Title: $438 Cheap flights from Islip to Carlsbad (ISP to CLD) - Expedia.com ![](https://images.trvl-media.com/place/6056550/6dda68e1-544f-4579-a0c9-eb6c39b73ec0.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/6056550/6dda68e1-544f-4579-a0c9-eb6c39b73ec0.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # $438 Cheap Flights from Islip (ISP) to Carlsbad (CLD) [View $438 flight on Tue, Mar 31, 2026](https://expedia.com/Flights-Search?trip=oneway&leg1=from:ISP,to:CLD,departure:3/31/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:437.20&airProductToken=AQqSAQopCLmWARIDMjEyGMh8IMGTASjHjIkDMJyNiQM4QkAAWAFqAkVScgNCSVAKMgjBggESBDEwNTcYwZMBIO-5ASjjjYkDMMiQiQM4UUABWAFqBE1BSU5yCFFVQUpaU001CjEIwYIBEgQ0MjM2GO-5ASDiGij3kYkDMMCSiQM4UUABWAFqBE1BSU5yCFFVQUpaU001EgoIARABGAEqAkFBGAEiBAgBEAEoAigDKAQwAQ) ## Popular airlines from MacArthur Airport (ISP) to Carlsbad, CA (CLD-McClellan-Palomar) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg) American Airlines [](https://www.expedia.com/Flights-Search?leg1=from:ISP,to:CLD,departure:3/31/2026TANYT&leg2=from:CLD,to:ISP,departure:4/7/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_UA.svg) United [](https://www.expedia.com/Flights-Search?leg1=from:ISP,to:CLD,departure:3/31/2026TANYT&leg2=from:CLD,to:ISP,departure:4/7/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_WN.svg) Southwest Airlines [](https://www.expedia.com/Flights-Search?leg1=from:ISP,to:CLD,departure:3/31/2026TANYT&leg2=from:CLD,to:ISP,departure:4/7/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"WN"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_DL.svg) Delta [](https://www.expedia.com/Flights-Search?leg1=from:ISP,to:CLD,departure:3/31/2026TANYT&leg2=from:CLD,to:ISP,departure:4/7/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_F9.svg) Frontier Airlines [](https://www.expedia.com/Flights-Search?leg1=from:ISP,to:CLD,departure:3/31/2026TANYT&leg2=from:CLD,to:ISP,departure:4/7/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"F9"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_B6.svg) JetBlue Airways [](https://www.expedia.com/Flights-Search?leg1=from:ISP,to:CLD,departure:3/31/2026TANYT&leg2=from:CLD,to:ISP,departure:4/7/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"B6"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AS.svg) Alaska Airlines [](https://www.expedia.com/Flights-Search?leg1=from:ISP,to:CLD,departure:3/31/2026TANYT&leg2=from:CLD,to:ISP,departure:4/7/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AS"}}]) - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__notification.svg) ### Be in the know Get alerts if flight prices drop or rise\* - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__deals.svg) ### Book smarter Save up to 30% on select hotels after you book a flight\* - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__trophy.svg) ### Earn twice Earn your airline miles on top of our OneKeyCash [Learn about One Key](https://www.expedia.com/welcome-one-key) ## Cheap Flights from Islip to Carlsbad (ISP-CLD) Prices were available within the past 7 days and start at $438 for one-way flights and $909 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Roundtrip ![Cape Air](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/9k.gif) Tue, Jul 21 - Tue, Aug 4 ISP Islip CLD Carlsbad $909 Roundtrip found 23 hours ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ISP,to:CLD,departure:7/21/2026TANYT&leg2=from:CLD,to:ISP,departure:8/4/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:908.41&airProductToken=AQqSAQopCLmWARIDMjE0GMh8IMGTASje-ZIDMLz6kgM4QkAAWAFqAkVScgNCSVAKMgjBggESBDMzMTMYwZMBIO-5ASjz-5IDMMr-kgM4UUABWAFqBE1BSU5yCFFWQUlaU001CjEIwYIBEgQ0MTU0GO-5ASDiGiif_5IDMOn_kgM4UUABWAFqBE1BSU5yCFFWQUlaU001CpIBCjEIwYIBEgQ0MjA0GOIaIO-5ASjempQDMLGblAM4TkAAWAFqBE1BSU5yCE5WRkhaTk0zCjIIwYIBEgQyNzAxGO-5ASDBkwEo_ZyUAzCpn5QDOE5AAVgBagRNQUlOcghOVkZIWk5NMwopCLmWARIDMjExGMGTASDIfCiKoZQDMOmhlAM4QkABWAFqAkVScgNCSVASCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAB) ![Cape Air](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/9k.gif) Wed, Jul 8 - Mon, Jul 13 ISP Islip CLD Carlsbad $919 Roundtrip found 2 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ISP,to:CLD,departure:7/8/2026TANYT&leg2=from:CLD,to:ISP,departure:7/13/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:918.41&airProductToken=AQqSAQopCLmWARIDMjEwGMh8IMGTASiN5ZEDMOvlkQM4QkAAWAFqAkVScgNCSVAKMgjBggESBDEwNTcYwZMBIO-5ASjV55EDMK7qkQM4UUABWAFqBE1BSU5yCFFWQUlaU001CjEIwYIBEgQ0MDIxGO-5ASDiGiiU65EDMNzrkQM4UUABWAFqBE1BSU5yCFFWQUlaU001CpIBCjEIwYIBEgQ0MDIxGOIaIO-5ASiipJIDMPSkkgM4TkAAWAFqBE1BSU5yCE5WRkhaTk0zCjIIwYIBEgQyNzAxGO-5ASDBkwEovaWSAzDpp5IDOE5AAVgBagRNQUlOcghOVkZIWk5NMwopCLmWARIDMjExGMGTASDIfCjKqZIDMKmqkgM4QkABWAFqAkVScgNCSVASCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAB) ![Cape Air](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/9k.gif) Mon, Apr 27 - Wed, Apr 29 ISP Islip CLD Carlsbad $955 Roundtrip found 6 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ISP,to:CLD,departure:4/27/2026TANYT&leg2=from:CLD,to:ISP,departure:4/29/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:954.40&airProductToken=AQqSAQopCLmWARIDMjEyGMh8IMGTASinvIsDMPy8iwM4U0AAWAFqAkVScgNTSVAKMgjBggESBDEwNTcYwZMBIO-5ASjJvYsDMKHAiwM4UUABWAFqBE1BSU5yCFFWQUpaU001CjEIwYIBEgQ0MDIxGO-5ASDiGiipwYsDMPjBiwM4UUABWAFqBE1BSU5yCFFWQUpaU001CpIBCjEIwYIBEgQ0MDIyGOIaIO-5ASjK0osDMJ3TiwM4UUAAWAFqBE1BSU5yCFFWQUpaU001CjIIwYIBEgQxNDUwGO-5ASDBkwEoxdOLAzD41YsDOFFAAVgBagRNQUlOcghRVkFKWlNNNQopCLmWARIDMjE3GMGTASDIfCjb1osDMLHXiwM4QkABWAFqAkVScgNCSVASCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAB) ![Cape Air](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/9k.gif) Sun, Sep 6 - Fri, Sep 11 ISP Islip CLD Carlsbad $995 Roundtrip found 3 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ISP,to:CLD,departure:9/6/2026TANYT&leg2=from:CLD,to:ISP,departure:9/11/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:994.41&airProductToken=AQqSAQopCLmWARIDMjE0GMh8IMGTASi-ipcDMJyLlwM4QkAAWAFqAkVScgNCSVAKMgjBggESBDE4NTAYwZMBIO-5ASjTjJcDMKePlwM4TkABWAFqBE1BSU5yCE5WQUpaU00zCjEIwYIBEgQ0MTU0GO-5ASDiGij_j5cDMMiQlwM4TkABWAFqBE1BSU5yCE5WQUpaU00zCpIBCjEIwYIBEgQzNTk1GOIaIO-5ASiix5cDMPbHlwM4TkAAWAFqBE1BSU5yCE5WQVpaTk0zCjIIwYIBEgQyNzAxGO-5ASDBkwEovciXAzDiypcDOE5AAVgBagRNQUlOcghOVkFaWk5NMwopCLmWARIDMjExGMGTASDIfCjKzJcDMKnNlwM4U0ABWAFqAkVScgNTSVASCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAB) ![Cape Air](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/9k.gif) Sun, Sep 6 - Fri, Sep 11 ISP Islip CLD Carlsbad $996 Roundtrip found 3 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ISP,to:CLD,departure:9/6/2026TANYT&leg2=from:CLD,to:ISP,departure:9/11/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:995.41&airProductToken=AQqSAQopCLmWARIDMjEwGMh8IMGTASiNiJcDMOuIlwM4QkAAWAFqAkVScgNCSVAKMgjBggESBDE2NTMYwZMBIO-5ASieiZcDMPCLlwM4R0ABWAFqBE1BSU5yCEdVQVpaTk0zCjEIwYIBEgQzNjA5GO-5ASDiGii9jJcDMJSNlwM4R0ABWAFqBE1BSU5yCEdVQVpaTk0zCpIBCjEIwYIBEgQ0MDIyGOIaIO-5ASi4wZcDMInClwM4TkAAWAFqBE1BSU5yCE5WQVpaTk0zCjIIwYIBEgQxMjQ1GO-5ASDBkwEoosKXAzDVxJcDOE5AAVgBagRNQUlOcghOVkFaWk5NMwopCLmWARIDMjE3GMGTASDIfCi7xZcDMJHGlwM4QkABWAFqAkVScgNCSVASCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAB) ![Cape Air](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/9k.gif) Tue, Jul 21 - Tue, Aug 4 ISP Islip CLD Carlsbad $1,034 Roundtrip found 23 hours ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ISP,to:CLD,departure:7/21/2026TANYT&leg2=from:CLD,to:ISP,departure:8/4/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1033.40&airProductToken=AQqSAQopCLmWARIDMjE0GMh8IMGTASje-ZIDMLz6kgM4QkAAWAFqAkVScgNCSVAKMgjBggESBDMzMTMYwZMBIO-5ASjz-5IDMMr-kgM4UUABWAFqBE1BSU5yCFFWQUlaU001CjEIwYIBEgQ0MTU0GO-5ASDiGiif_5IDMOn_kgM4UUABWAFqBE1BSU5yCFFWQUlaU001CpIBCjEIwYIBEgQ0MDIyGOIaIO-5ASjolZQDMLmWlAM4R0AAWAFqBE1BSU5yCEdVQVpaTk0zCjIIwYIBEgQxNTY0GO-5ASDBkwEo7paUAzCnmZQDOEdAAVgBagRNQUlOcghHVUFaWk5NMwopCLmWARIDMjE3GMGTASDIfCj7mZQDMNGalAM4U0ABWAFqAkVScgNTSVASCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAB) ![Cape Air](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/9k.gif) Thu, May 28 - Sun, May 31 ISP Islip CLD Carlsbad $1,042 Roundtrip found 2 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ISP,to:CLD,departure:5/28/2026TANYT&leg2=from:CLD,to:ISP,departure:5/31/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1041.40&airProductToken=AQqSAQopCLmWARIDMjE0GMh8IMGTASiemo4DMPyajgM4QkAAWAFqAkVScgNCSVAKMgjBggESBDMzMTMYwZMBIO-5ASixnI4DMIyfjgM4UUABWAFqBE1BSU5yCFFWQUlaU001CjEIwYIBEgQ0MTU0GO-5ASDiGijfn44DMKigjgM4UUABWAFqBE1BSU5yCFFWQUlaU001CpIBCjEIwYIBEgQ0MjA0GOIaIO-5ASi1v44DMIbAjgM4R0AAWAFqBE1BSU5yCEdVQVpaTk0xCjIIwYIBEgQyNzAxGO-5ASDBkwEouMGOAzDhw44DOEdAAVgBagRNQUlOcghHVUFaWk5NMQopCLmWARIDMjExGMGTASDIfCjqxY4DMMnGjgM4QkABWAFqAkVScgNCSVASCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAB) ![Cape Air](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/9k.gif) Sun, Sep 6 - Fri, Sep 11 ISP Islip CLD Carlsbad $1,056 Roundtrip found 3 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ISP,to:CLD,departure:9/6/2026TANYT&leg2=from:CLD,to:ISP,departure:9/11/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1055.41&airProductToken=AQqSAQopCLmWARIDMjEwGMh8IMGTASiNiJcDMOuIlwM4QkAAWAFqAkVScgNCSVAKMgjBggESBDE2NTMYwZMBIO-5ASieiZcDMPCLlwM4R0ABWAFqBE1BSU5yCEdVQVpaTk0zCjEIwYIBEgQzNjA5GO-5ASDiGii9jJcDMJSNlwM4R0ABWAFqBE1BSU5yCEdVQVpaTk0zCpIBCjEIwYIBEgQzNTk1GOIaIO-5ASiix5cDMPbHlwM4TkAAWAFqBE1BSU5yCE5WQVpaTk0zCjIIwYIBEgQyNzAxGO-5ASDBkwEovciXAzDiypcDOE5AAVgBagRNQUlOcghOVkFaWk5NMwopCLmWARIDMjExGMGTASDIfCjKzJcDMKnNlwM4U0ABWAFqAkVScgNTSVASCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAB) ![Cape Air](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/9k.gif) Thu, Jul 9 - Tue, Jul 14 ISP Islip CLD Carlsbad $1,069 Roundtrip found 2 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ISP,to:CLD,departure:7/9/2026TANYT&leg2=from:CLD,to:ISP,departure:7/14/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1068.40&airProductToken=AQqSAQopCLmWARIDMjEwGMh8IMGTASit8JEDMIvxkQM4QkAAWAFqAkVScgNCSVAKMgjBggESBDEwNTcYwZMBIO-5ASj18pEDMM71kQM4TkABWAFqBE1BSU5yCE5WRkhaTk0zCjEIwYIBEgQ0MDIxGO-5ASDiGii09pEDMPz2kQM4TkABWAFqBE1BSU5yCE5WRkhaTk0zCpIBCjEIwYIBEgQ0MDIyGOIaIO-5ASjIqZIDMJmqkgM4UUAAWAFqBE1BSU5yCFFWQUlaU001CjIIwYIBEgQxNTY0GO-5ASDBkwEozqqSAzCHrZIDOFFAAVgBagRNQUlOcghRVkFJWlNNNQopCLmWARIDMjE3GMGTASDIfCjbrZIDMLGukgM4QkABWAFqAkVScgNCSVASCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAB) ![Cape Air](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/9k.gif) Thu, Jul 9 - Mon, Jul 13 ISP Islip CLD Carlsbad $1,077 Roundtrip found 2 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ISP,to:CLD,departure:7/9/2026TANYT&leg2=from:CLD,to:ISP,departure:7/13/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1076.40&airProductToken=AQqSAQopCLmWARIDMjEyGMh8IMGTASjH8ZEDMJzykQM4QkAAWAFqAkVScgNCSVAKMgjBggESBDMzMTMYwZMBIO-5ASjz9JEDMMr3kQM4TkABWAFqBE1BSU5yCE5WRkhaTk0zCjEIwYIBEgQ0MTU0GO-5ASDiGiif-JEDMOn4kQM4TkABWAFqBE1BSU5yCE5WRkhaTk0zCpIBCjEIwYIBEgQ0MDIxGOIaIO-5ASiipJIDMPSkkgM4TkAAWAFqBE1BSU5yCE5WRkhaTk0zCjIIwYIBEgQyNzAxGO-5ASDBkwEovaWSAzDpp5IDOE5AAVgBagRNQUlOcghOVkZIWk5NMwopCLmWARIDMjExGMGTASDIfCjKqZIDMKmqkgM4QkABWAFqAkVScgNCSVASCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAB) ## Alternative airports near Carlsbad Prices were available within the past 7 days. Prices and availability are subject to change. [](https://www.expedia.com/Flights-Search?leg1=from:ISP,to:SAN,departure:3/31/2026TANYT&leg2=from:SAN,to:ISP,departure:4/3/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) SAN San Diego Intl. Cheapest 38 min [Flights from $1,188 ](https://www.expedia.com/Flights-Search?leg1=from:ISP,to:SAN,departure:3/31/2026TANYT&leg2=from:SAN,to:ISP,departure:4/3/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) ## Travel information | Origin airport | MacArthur | | ------------------- | ----------------- | | Destination airport | McClellan-Palomar | | Roundtrip price | $908 | | Distance | 2468 mi | ## Book with confidence # Islip to Carlsbad Flights The cheapest times to fly from Islip to Carlsbad On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Islip to Carlsbad are during the month of July. You can find some of the cheapest flights from Islip to Carlsbad with Expedia's search tool and vast selection of airlines. The best time to book a flight from Islip to Carlsbad Sunday is one of the best days to book for cheap flights from Islip to Carlsbad: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance. How to find cheap round-trip tickets from Islip to Carlsbad Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Islip to Carlsbad in 2026\. You can also book with separate airlines for your outbound and return journeys, from $438 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference\*. This is available for a small fee, and is free to One Key Gold and Platinum tier members. Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Islip to Carlsbad flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps. You could also save big by booking one of Expedia's [vacation packages](https://www.expedia.com/package-deals). Bundling together your Islip to Carlsbad airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures. \*Terms apply. Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023\. The percentages you see are averages. \*Flight schedules are subject to change. ## Explore a world of travel with Expedia - Lodging - Flights - Packages - Cars - Vacation Rentals - Other - [Hotels near LEGOLAND® California ](https://www.expedia.com/LEGOLAND-California-Hotels.0-l6051767-0.Travel-Guide-Filter-Hotels) - [Hotels near Carlsbad Skatepark ](https://www.expedia.com/Carlsbad-Skatepark-Hotels.0-l553248621532638502-0.Travel-Guide-Filter-Hotels) - [Carlsbad Hotels ](https://www.expedia.com/Carlsbad-Hotels.d6056550.Travel-Guide-Hotels) - [Hotels near Bressi Ranch ](https://www.expedia.com/Bressi-Ranch-Carlsbad-Hotels.0-n553248635976472990-0.Travel-Guide-Filter-Hotels) - [Hotels near Rancho Carlsbad Golf Course ](https://www.expedia.com/Rancho-Carlsbad-Golf-Course-Hotels.0-l553248621532638714-0.Travel-Guide-Filter-Hotels) - [Hotels near The Crossings at Carlsbad ](https://www.expedia.com/The-Crossings-At-Carlsbad-Hotels.0-l553248634335711822-0.Travel-Guide-Filter-Hotels) - [Hotels near Aviara ](https://www.expedia.com/Aviara-Carlsbad-Hotels.0-n553248635976480927-0.Travel-Guide-Filter-Hotels) - 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[Hotels near South Carlsbad State Beach ](https://www.expedia.com/South-Carlsbad-State-Beach-Hotels.0-l553248635976195369-0.Travel-Guide-Filter-Hotels) - [Hotels near Calavera Park ](https://www.expedia.com/Calavera-Park-Hotels.0-l553248621532638715-0.Travel-Guide-Filter-Hotels) - [Hotels near Calavera Hills ](https://www.expedia.com/Calavera-Hills-Carlsbad-Hotels.0-n553248635976479247-0.Travel-Guide-Filter-Hotels) - [Gay friendly Hotels in Calavera Hills ](https://www.expedia.com/Calavera-Hills-Carlsbad-Hotels-LGBT-Welcoming-Hotel.0-n553248635976479247-0-tLGBTWelcomingHotel.Travel-Guide-Filter-Hotels) - [Hotels near Lake San Marcos Executive Course ](https://www.expedia.com/Lake-San-Marcos-Executive-Course-Hotels.0-l553248621532638722-0.Travel-Guide-Filter-Hotels) - [Hotels near Terramar ](https://www.expedia.com/Terramar-Carlsbad-Hotels.0-n553248635976470687-0.Travel-Guide-Filter-Hotels) - [Hotels near South Ponto Beach ](https://www.expedia.com/South-Ponto-Beach-Hotels.0-l628352236596883456-0.Travel-Guide-Filter-Hotels) - [Hotels near Carlsbad Lagoon ](https://www.expedia.com/Carlsbad-Lagoon-Hotels.0-l553248621532638713-0.Travel-Guide-Filter-Hotels) - [Hotels near Lake ](https://www.expedia.com/Lake-Oceanside-Hotels.0-n553248635976468939-0.Travel-Guide-Filter-Hotels) - [Luxury Hotels in Lake ](https://www.expedia.com/Lake-Oceanside-Hotels-Luxury-Hotel.0-n553248635976468939-0-tLuxuryHotel.Travel-Guide-Filter-Hotels) - [Lake San Marcos Hotels ](https://www.expedia.com/Lake-San-Marcos-Hotels.d182988.Travel-Guide-Hotels) - [Pet-Friendly Hotels in Lake San Marcos ](https://www.expedia.com/Lake-San-Marcos-Hotels-Pet-Friendly-Hotel.0-0-d182988-tPetfriendlyHotel.Travel-Guide-Filter-Hotels) - [4 Star Hotels in Lake San Marcos ](https://www.expedia.com/4Star-Lake-San-Marcos-Hotels.s40-0-d182988.Travel-Guide-Filter-Hotels) - [Cabin Rentals in Lake San Marcos ](https://www.expedia.com/Lake-San-Marcos-Cabins.d182988-aaCabins.Travel-Guide-Accommodation) - [Cottages in Lake San Marcos ](https://www.expedia.com/Lake-San-Marcos-Cottages.d182988-aaCottages.Travel-Guide-Accommodation) - 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[The Crossings at Carlsbad ](https://www.expedia.com/The-Crossings-At-Carlsbad-Carlsbad.d553248634335711822.Vacation-Attraction) - [Poinsettia Park ](https://www.expedia.com/Poinsettia-Park-Aviara.d553248621532638506.Vacation-Attraction) - [Agua Hedionda Lagoon Foundation ](https://www.expedia.com/Agua-Hedionda-Lagoon-Foundation-Carlsbad.d553248633876894818.Vacation-Attraction) - [Sea LIFE Carlsbad Aquarium ](https://www.expedia.com/SEA-LIFE-Carlsbad-Aquarium-Carlsbad.d6128022.Vacation-Attraction) - [Craftsmanship Museum ](https://www.expedia.com/Craftsmanship-Museum-Carlsbad.d553248621532638721.Vacation-Attraction) - [Batiquitos Lagoon ](https://www.expedia.com/Batiquitos-Lagoon-Aviara.d553248621532638510.Vacation-Attraction) - [Aviara Golf Club ](https://www.expedia.com/Aviara-Golf-Club-Aviara.d553248621532638511.Vacation-Attraction) - [Aviara Golf Academy ](https://www.expedia.com/Aviara-Golf-Academy-Aviara.d553248621532638509.Vacation-Attraction) - [Leo Carrillo Ranch Historic Park ](https://www.expedia.com/Leo-Carrillo-Ranch-Historic-Park-Carlsbad.d553248621532638503.Vacation-Attraction) - [Flower Fields of Carlsbad ](https://www.expedia.com/Flower-Fields-Of-Carlsbad-Carlsbad.d6128020.Vacation-Attraction) - [Gia Museum ](https://www.expedia.com/GIA-Museum-Carlsbad.d553248621532638505.Vacation-Attraction) - [Carlsbad Premium Outlets ](https://www.expedia.com/Carlsbad-Premium-Outlets-Carlsbad.d6157989.Vacation-Attraction) - [Museum of Making Music ](https://www.expedia.com/Museum-Of-Making-Music-Carlsbad.d553248621532638504.Vacation-Attraction) - [Batiquitos Lagoon Foundation Nature Center ](https://www.expedia.com/Batiquitos-Lagoon-Foundation-Nature-Center-Aviara.d553248633876894827.Vacation-Attraction) - [Calavera Park ](https://www.expedia.com/Calavera-Park-Calavera-Hills-Village.d553248621532638715.Vacation-Attraction) - [Lake San Marcos Executive Course ](https://www.expedia.com/Lake-San-Marcos-Executive-Course-San-Marcos.d553248621532638722.Vacation-Attraction) - [South Ponto Beach ](https://www.expedia.com/South-Ponto-Beach-Encinitas.d628352236596883456.Vacation-Attraction) - [Visit Lake San Marcos ](https://www.expedia.com/Lake-San-Marcos.dx182988) - [Lake San Marcos Vacations ](https://www.expedia.com/Lake-San-Marcos.d182988.Destination-Travel-Guides) - [Car rentals near The Crossings at Carlsbad ](https://www.expedia.com/Car-Rentals-In-The-Crossings-At-Carlsbad.d553248634335711822.Car-Rental-Guide) - [Car rentals near Poinsettia Park ](https://www.expedia.com/Car-Rentals-In-Poinsettia-Park.d553248621532638506.Car-Rental-Guide) - [Car rentals near LEGOLAND® California ](https://www.expedia.com/Car-Rentals-In-LEGOLAND-California.d6051767.Car-Rental-Guide) - [Standard Car Rentals near LEGOLAND® California ](https://www.expedia.com/Standard-Car-Rentals-In-LEGOLAND-California.d6051767-tStandard.Car-Rental-Guide-Class) - [Fullsize Car Rentals near LEGOLAND® California ](https://www.expedia.com/Fullsize-Car-Rentals-In-LEGOLAND-California.d6051767-tFullsize.Car-Rental-Guide-Class) - [Car rentals near La Costa Golf Courses - North and South ](https://www.expedia.com/Car-Rentals-In-La-Costa-Golf-Courses-North-And-South.d553248621532638853.Car-Rental-Guide) - [Car rentals near Aviara Golf Club ](https://www.expedia.com/Car-Rentals-In-Aviara-Golf-Club.d553248621532638511.Car-Rental-Guide) - [Car rentals near Leo Carrillo Ranch Historic Park ](https://www.expedia.com/Car-Rentals-In-Leo-Carrillo-Ranch-Historic-Park.d553248621532638503.Car-Rental-Guide) - [Car rentals near Flower Fields of Carlsbad ](https://www.expedia.com/Car-Rentals-In-Flower-Fields-Of-Carlsbad.d6128020.Car-Rental-Guide) - [Car rentals near Carlsbad Premium Outlets ](https://www.expedia.com/Car-Rentals-In-Carlsbad-Premium-Outlets.d6157989.Car-Rental-Guide) - [Car rentals near Carlsbad Lagoon ](https://www.expedia.com/Car-Rentals-In-Carlsbad-Lagoon.d553248621532638713.Car-Rental-Guide) - [Car rentals near Lake San Marcos ](https://www.expedia.com/Car-Rentals-In-Lake-San-Marcos.d182988.Car-Rental-Guide) - [Lake San Marcos Vacation Rentals ](https://www.expedia.com/Lake-San-Marcos-Vacation-Rentals.d182988.Travel-Guide-VacationRentals) - [Things to do in Lake San Marcos ](https://www.expedia.com/Things-To-Do-In-Lake-San-Marcos.d182988.Travel-Guide-Activities) \*Available to One Key members.