Title: $28 Cheap flights from Ontario, CA - Expedia.com ![](https://a.travel-assets.com/travel-assets-manager/fallback-images-brand/bex_flights_v2.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # $28 Cheap flights from Ontario, CA [View $28 flight on Wed, Apr 8, 2026](https://expedia.com/Flights-Search?trip=oneway&leg1=from:ONT,to:LAS,departure:4/8/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:27.98&airProductToken=AQoyCjAIxnISBDQ3NTgYrpsBIIuQASiY64kDMN7riQM4RUAAWAFqBFBDXzFyB0sxNFhYUzISCggBEAEYASoCRjkYASIECAEQASgCKAMwDQ) [Ontario Travel Guide](https://expedia.com/Ontario.dx2680)[Hotels in Ontario](https://expedia.com/Ontario-Hotels.d2680.Travel-Guide-Hotels)[Things to do in Ontario](https://expedia.com/Things-To-Do-In-Ontario.d2680.Travel-Guide-Activities)[Car Rentals in Ontario](https://expedia.com/Car-Rentals-In-Ontario.d2680.Car-Rental-Guide)[Ontario Vacation Packages](https://expedia.com/Ontario.d2680.Destination-Travel-Guides) ## Popular airlines from Ontario - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AS.svg) Alaska Airlines - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_UA.svg) United - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg) American Airlines - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_DL.svg) Delta - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_F9.svg) Frontier Airlines - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_WN.svg) Southwest Airlines - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_B6.svg) JetBlue Airways - ![](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) ## Today's featured flight deals from Ontario Nonstop Carry-on included Lower price than typical - Los Angeles (LAX)Las Vegas (LAS) Tue, Apr 14 Wed, Apr 22 ![American Airlines](https://a.travel-assets.com/air/airlines/aa_sq.svg)American Airlines • Nonstop --- 7-day trip found 17 hours ago 65% less than typical $117 [](https://www.expedia.com/Flights-Search?leg1=from:LAX,to:LAS,departure:4/14/2026TANYT&leg2=from:LAS,to:LAX,departure:4/22/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&airOfferToken=v5-sos-51659b3d6bf34f22bba220fac5a155eb-398-1~9.S.1~AQoGCAEQyr4NEgcI1AQQARhAKAJYAnAAegNiZnOIAZnCuV2qAQcKA0xBWBAAsgEHCgNMQVMQAA~AQo1CjMIwYIBEgQyMjU2GIu4ASCLkAEo66yKAzC6rYoDOEJAAFgBagVCQVNJQ3IIT1ZBSUtTQlgKNQozCMGCARIEMjY5MBiLkAEgi7gBKJeEiwMw6ISLAzhCQABYAWoFQkFTSUNyCE9WQUlLU0JYEgoIARABGAEqAkFBGAEiBAgBEAEoAigDKAQwCw&medianPrice=427.00&displayPrice=116.79&src=dflp) - Los Angeles (LAX)Las Vegas (LAS) Wed, Apr 8 Sun, Apr 12 ![Southwest Airlines](https://a.travel-assets.com/air/airlines/wn_sq.svg)Southwest Airlines • Nonstop --- 4-day trip just found 45% less than typical $166 [](https://www.expedia.com/Flights-Search?leg1=from:LAX,to:LAS,departure:4/8/2026TANYT&leg2=from:LAS,to:LAX,departure:4/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&airOfferToken=v5-sos-8ec768a0b4b64c5aa85d5d2ae320f605-149-1~8.S.1~AQoCCAESBwjUBBABGAEoAlgCcAB6A2Jmc4gByJO9XZABLKoBBwoDTEFYEACyAQcKA0xBUxAA~AQoyCjAI15wBEgQzODI4GIu4ASCLkAEorOeJAzD354kDOFZAAFgBagNXR0FyB1ZCTlZOMkQKZAowCNecARIEMjgyNhiLkAEgk5UBKP6aigMwzpuKAzhEQABYAWoDV0dBcgdETEFWVzJECjAI15wBEgQyNzc1GJOVASCLuAEohp-KAzDqn4oDOERAAVgBagNXR0FyB0RMQVZXMkQSCggBEAEYASoCV04YASIECAEQASgCKAMoBDAB&medianPrice=378.00&displayPrice=165.60&src=dflp) - Los Angeles (LAX)San Salvador (SAL) Wed, Apr 22 Sat, May 2 ![Avianca](https://a.travel-assets.com/air/airlines/av_sq.svg)Avianca • Nonstop --- 10-day trip found 20 hours ago 40% less than typical $367 [](https://www.expedia.com/Flights-Search?leg1=from:LAX,to:SAL,departure:4/22/2026TANYT&leg2=from:SAL,to:LAX,departure:5/2/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&airOfferToken=v5-sos-a592150c537a46b1a99acd6e66331ee5-605-1-st-v5-sos-a592150c537a46b1a99acd6e66331ee5-602-1~8.S.1~AQoCCAESBwjUBBABGAEoAlgCcABwAHoDYmZzegNiZnOIAY7suF2iAQFOqgEHCgNMQVgQALIBBwoDU0FMEAA~AQozCjEIwawBEgM1MjEYi7gBIJJYKKCBiwMwzIOLAzhVQABYAWoFTElHSFRyCFVaT0IxSVI5EgoIARABGAEqAkFWGAEiBAgBEAEoAigDKAQwAQ.AQozCjEIwawBEgM1MjgYklggi7gBKK_5iwMw9PuLAzhTQABYAWoFTElHSFRyCFNaT0IxR1I5EgoIARABGAEqAkFWGAEiBAgBEAEoAigDKAQwAQ&medianPrice=828.00&displayPrice=366.27&src=dflp) - Los Angeles (LAX)San Salvador (SAL) Thu, Apr 23 Sun, May 3 ![Avianca](https://a.travel-assets.com/air/airlines/av_sq.svg)Avianca • Nonstop --- 10-day trip found 18 hours ago 35% less than typical $437 [](https://www.expedia.com/Flights-Search?leg1=from:LAX,to:SAL,departure:4/23/2026TANYT&leg2=from:SAL,to:LAX,departure:5/3/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&airOfferToken=v5-sos-9a998c2e04a6429ba96e7f5acb3db89b-419-1-st-v5-sos-9a998c2e04a6429ba96e7f5acb3db89b-415-1~8.S.1~AQoCCAESBwjUBBABGAEoAlgCcABwAHoDYmZzegNiZnOIAYGPuV2iAQFOqgEHCgNRTEEQALIBBwoDU0FMEAA~AQozCjEIwawBEgM1MjEYi7gBIJJYKMCMiwMw7I6LAzhXQABYAWoFTElHSFRyCFdFT0IxRlI5EgoIARABGAEqAkFWGAEiBAgBEAEoAigDKAQwAQ.AQozCjEIwawBEgM1MjAYklggi7gBKKeEjAMw9oaMAzhTQABYAWoFTElHSFRyCFNaT0IxR1I5EgoIARABGAEqAkFWGAEiBAgBEAEoAigDKAQwAQ&medianPrice=880.00&displayPrice=436.27&src=dflp) - Los Angeles (LAX)San Salvador (SAL) Wed, Apr 29 Thu, May 7 ![Avianca](https://a.travel-assets.com/air/airlines/av_sq.svg)Avianca • Nonstop --- 8-day trip just found 45% less than typical $329 [](https://www.expedia.com/Flights-Search?leg1=from:LAX,to:SAL,departure:4/29/2026TANYT&leg2=from:SAL,to:LAX,departure:5/7/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&airOfferToken=v5-sos-e0f94ebb2b7641b7886769739b90ef7e-628-1-st-v5-sos-e0f94ebb2b7641b7886769739b90ef7e-577-1~8.S.1~AQoCCAESBwjUBBABGAEoAlgCcABwAHoDYmZzegNiZnOIAaSNvV2QAQCQASSiAQFOqgEHCgNMQVgQALIBBwoDU0FMEAA~AQozCjEIwawBEgM1MjEYi7gBIJJYKIDQiwMwrNKLAzhVQABYAWoFTElHSFRyCFVaT0IxSVI5EgoIARABGAEqAkFWGAEiBAgBEAEoAigDKAQwAQ.AQpoCjEIwYIBEgMzODAYklggo7EBKL-vjAMwp7GMAzhCQABYAWoFQkFTSUNyCE9OTjJBVEJaCjMIwYIBEgQxNjY5GKOxASCLuAEozLKMAzCctIwDOEJAAVgBagVCQVNJQ3IIT05OMkFUQloSCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAL&medianPrice=806.00&displayPrice=328.91&src=dflp) - Los Angeles (LAX)Guatemala City (GUA) Sat, Apr 18 Sat, Apr 25 ![Avianca](https://a.travel-assets.com/air/airlines/av_sq.svg)Avianca • Nonstop --- 6-day trip found 18 hours ago 50% less than typical $416 [](https://www.expedia.com/Flights-Search?leg1=from:LAX,to:GUA,departure:4/18/2026TANYT&leg2=from:GUA,to:LAX,departure:4/25/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&airOfferToken=v5-sos-e05d288e0160492796a6bb42a572d753-972-1-st-v5-sos-e05d288e0160492796a6bb42a572d753-974-1~8.S.1~AQoCCAESBwjUBBABGAEoAlgCcABwAHoDYmZzegNiZnOIAbiYuV2QAQGQARKqAQcKA1FMQRAAsgEHCgNHVUEQAA~AQozCjEIwawBEgM2NDEYi7gBIIYFKNTaigMw7NyKAzhXQABYAWoFTElHSFRyCFdFT0IxQlI5EgoIARABGAEqAkFWGAEiBAgBEAEoAigDKAQwAQ.AQplCjAIwawBEgM1NzkYhgUgklgozaSLAzD6pIsDOFpAAFgBagVMSUdIVHIIWkVPQjFCUjkKMQjBrAESAzUyMBiSWCCLuAEop6qLAzD2rIsDOFpAAVgBagVMSUdIVHIIWkVPQjFCUjkSCggBEAEYASoCQVYYASIECAEQASgCKAMoBDAB&medianPrice=1073.00&displayPrice=415.43&src=dflp) - Los Angeles (LAX)Guatemala City (GUA) Tue, Apr 28 Sat, May 2 ![Avianca](https://a.travel-assets.com/air/airlines/av_sq.svg)Avianca • Nonstop --- 3-day trip found 4 hours ago 55% less than typical $366 [](https://www.expedia.com/Flights-Search?leg1=from:LAX,to:GUA,departure:4/28/2026TANYT&leg2=from:GUA,to:LAX,departure:5/2/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&airOfferToken=v5-sos-364e7850a6e44f5b9c54c004d4ab7486-706-1-st-v5-sos-364e7850a6e44f5b9c54c004d4ab7486-702-1~8.S.1~AQoCCAESBwjUBBABGAEoAlgCcABwAHoDYmZzegNiZnOIAfmuvF2QAQ2QASOqAQcKA0xBWBAAsgEHCgNHVUEQAA~AQozCjEIwawBEgM2NDEYi7gBIIYFKJTLiwMwrM2LAzhTQABYAWoFTElHSFRyCFNFT0IxQlI5EgoIARABGAEqAkFWGAEiBAgBEAEoAigDKAQwAQ.AQplCjAIwawBEgM1NzMYhgUgklgowPWLAzDy9YsDOFdAAFgBagVMSUdIVHIIV0VPQjFCUjkKMQjBrAESAzUyMBiSWCCLuAEoh_mLAzDW-4sDOFdAAVgBagVMSUdIVHIIV0VPQjFCUjkSCggBEAEYASoCQVYYASIECAEQASgCKAMoBDAB&medianPrice=1018.00&displayPrice=365.43&src=dflp) - Los Angeles (LAX)Guatemala City (GUA) Tue, Apr 28 Sat, May 2 ![Avianca](https://a.travel-assets.com/air/airlines/av_sq.svg)Avianca • Nonstop --- 3-day trip found 20 hours ago 55% less than typical $367 [](https://www.expedia.com/Flights-Search?leg1=from:LAX,to:GUA,departure:4/28/2026TANYT&leg2=from:GUA,to:LAX,departure:5/2/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&airOfferToken=v5-sos-10ea9ddc95ac4aaeac64e386217d369e-851-1-st-v5-sos-10ea9ddc95ac4aaeac64e386217d369e-866-1~8.S.1~AQoCCAESBwjUBBABGAEoAlgCcABwAHoDYmZzegNiZnOIAY_ouF2QASuQAQCqAQcKA0xBWBAAsgEHCgNHVUEQAA~AQozCjEIwawBEgM2NDEYi7gBIIYFKJTLiwMwrM2LAzhTQABYAWoFTElHSFRyCFNFT0IxQlI5EgoIARABGAEqAkFWGAEiBAgBEAEoAigDKAQwAQ.AQplCjAIwawBEgM1NzMYhgUgklgowPWLAzDy9YsDOFdAAFgBagVMSUdIVHIIV0VPQjFCUjkKMQjBrAESAzUyMBiSWCCLuAEoh_mLAzDW-4sDOFdAAVgBagVMSUdIVHIIV0VPQjFCUjkSCggBEAEYASoCQVYYASIECAEQASgCKAMoBDAB&medianPrice=1018.00&displayPrice=366.43&src=dflp) ## Cheapest flights from Ontario These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Roundtrip ![Frontier Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/F9.gif) Sat, May 2 - Mon, May 4 SNA Orange County PHX Phoenix $56 Roundtrip just found [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:SNA,to:PHX,departure:5/2/2026TANYT&leg2=from:PHX,to:SNA,departure:5/4/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:55.96&airProductToken=AQoxCi8IxnISBDE3MjAYsgMg77kBKJP4iwMw6viLAzhFQABYAWoEUENfMXIHSzIxU1hTMgoxCi8IxnISBDE3MTkY77kBILIDKMONjAMwnI6MAzhFQABYAWoEUENfMXIHSzIxTlhTMhIKCAEQARgBKgJGORgBIgQIARABKAIoAzAN) ![Frontier Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/F9.gif) Mon, Apr 13 - Thu, Apr 16 SNA Orange County LAS Las Vegas $56 Roundtrip just found [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:SNA,to:LAS,departure:4/13/2026TANYT&leg2=from:LAS,to:SNA,departure:4/16/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:55.96&airProductToken=AQoxCi8IxnISBDE3MDAYsgMgi5ABKMykigMwlaWKAzhFQABYAWoEUENfMXIHSzIxTVhTMgoxCi8IxnISBDM3MzcYi5ABILIDKIzFigMw2MWKAzhFQABYAWoEUENfMXIHSzIxTVhTMhIKCAEQARgBKgJGORgBIgQIARABKAIoAzAN) ![Frontier Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/F9.gif) Wed, Apr 8 - Wed, Apr 15 ONT Ontario LAS Las Vegas $61 Roundtrip just found [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ONT,to:LAS,departure:4/8/2026TANYT&leg2=from:LAS,to:ONT,departure:4/15/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:60.96&airProductToken=AQoyCjAIxnISBDQyMDYYrpsBIIuQASjP7YkDMJbuiQM4RUAAWAFqBFBDXzFyB0sxNFhYUzIKMgowCMZyEgQxMjgzGIuQASCumwEovraKAzCIt4oDOEVAAFgBagRQQ18xcgdLMjFYWFMyEgoIARABGAEqAkY5GAEiBAgBEAEoAigDMA0) ![Frontier Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/F9.gif) Wed, Apr 1 - Wed, Apr 8 ONT Ontario DEN Denver $73 Roundtrip just found [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ONT,to:DEN,departure:4/1/2026TANYT&leg2=from:DEN,to:ONT,departure:4/8/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:72.96&airProductToken=AQoxCi8IxnISBDE1MDAYrpsBIINpKMCXiQMwz5iJAzhFQABYAWoEUENfMXIHWjA3WFhTOQoxCi8IxnISBDEyNjEYg2kgrpsBKK7tiQMwwO6JAzhFQABYAWoEUENfMXIHSzE0WFhTMhIKCAEQARgBKgJGORgBIgQIARABKAIoAzAN) ![Frontier Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/F9.gif) Tue, May 12 - Tue, May 19 ONT Ontario SFO San Francisco $76 Roundtrip found 1 hour ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ONT,to:SFO,departure:5/12/2026TANYT&leg2=from:SFO,to:ONT,departure:5/19/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:75.96&airProductToken=AQoxCi8IxnISBDI2NzcYrpsBILJxKKXrjAMwh-yMAzhFQABYAWoEUENfMXIHSzIxRVhTMgoxCi8IxnISBDI2NzgYsnEgrpsBKPK1jQMw1baNAzhFQABYAWoEUENfMXIHSzIxRVhTMhIKCAEQARgBKgJGORgBIgQIARABKAIoAzAN) ![Frontier Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/F9.gif) Sat, Apr 18 - Sat, Apr 25 SNA Orange County DEN Denver $80 Roundtrip found 1 hour ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:SNA,to:DEN,departure:4/18/2026TANYT&leg2=from:DEN,to:SNA,departure:4/25/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:79.96&airProductToken=AQowCi4IxnISBDQzNzIYsgMgg2kovtmKAzDQ2ooDOEVAAFgBagRQQ18xcgdaMDdTWFM5CjAKLgjGchIENDM3MRiDaSCyAyjVposDMPGniwM4RUAAWAFqBFBDXzFyB1owN1NYUzkSCggBEAEYASoCRjkYASIECAEQASgCKAMwDQ) ![Breeze Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/MX.gif) Mon, May 11 - Thu, May 14 SBD San Bernardino SFO San Francisco $102 Roundtrip found 23 hours ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:SBD,to:SFO,departure:5/11/2026TANYT&leg2=from:SFO,to:SBD,departure:5/14/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:101.21&airProductToken=AQosCioIzbABEgM2MDgYshggsnEo6d2MAzDH3owDOEFAAFgBagJOT3IFQU5PMDAKLAoqCM2wARIDNjAwGLJxILIYKJH_jAMw6_-MAzhBQABYAWoCTk9yBUFOTzAwEgoIARABGAEqAk1YGAEiBAgBEAEoAigDKAQwDQ) ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Tue, May 12 - Wed, May 13 ONT Ontario PHX Phoenix $117 Roundtrip found 2 hours ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ONT,to:PHX,departure:5/12/2026TANYT&leg2=from:PHX,to:ONT,departure:5/13/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:116.78&airProductToken=AQo1CjMIwYIBEgQyNDYzGK6bASDvuQEox-eMAzCY6IwDOEJAAFgBagVCQVNJQ3IIT1ZBSUtTQlgSCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAL) ![Alaska Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AS.gif) Thu, Apr 23 - Mon, Apr 27 SNA Orange County SEA Seattle $139 Roundtrip just found [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:SNA,to:SEA,departure:4/23/2026TANYT&leg2=from:SEA,to:SNA,departure:4/27/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:138.81&airProductToken=AQozCjEIwaYBEgQxMzI1GLIDIJIBKJmPiwMw0JCLAzhYQABYAWoFU0FWRVJyCEdINUVBVkJOCjIKMAjBpgESAzYzMRiSASCyAyjiwYsDMI7DiwM4WEAAWAFqBVNBVkVScghHSDVFQVZCThIMCAEQARgBKgJBUzIAGAEiBAgBEAEoAigDKAQwDQ) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Sat, May 2 - Sun, May 10 ONT Ontario SEA Seattle $139 Roundtrip just found [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ONT,to:SEA,departure:5/2/2026TANYT&leg2=from:SEA,to:ONT,departure:5/10/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:138.81&airProductToken=AQo4CjYIxJgBEgQ0MDMxGK6bASCSASjX-YsDMI37iwM4RUAAWAFqCU1BSU5CQVNJQ3IIVkZXU0EwQlEKOAo2CMSYARIENDA3MBiSASCumwEonc-MAzDE0IwDOEVAAFgBaglNQUlOQkFTSUNyCFZGV1NBMEJREgwIARABGAEqAkRMMgAYASIECAEQASgCKAMoBDAB) ## How to Find Cheap Flights from Ontario, CA #### How much is a flight from Ontario? This week, flights from Ontario are available between $56 – $139\. #### How to find cheap flights from Ontario? Expedia makes it easy to compare cheap flights from Ontario to many destinations. Check out excellent deals on domestic and international flights from Ontario. Once you select an offer, use our filters and sort by “Price (Lowest)” to see some of the cheapest and suitable options. #### How can I get the best deal on flights from Ontario? On Expedia, you have some of best airline ticket deals at your fingertips. Whether it’s a beach escape with your partner, a family vacation with your kids, or business trip with colleagues, these low airline ticket prices mean more savings for you. An excellent strategy for finding some of the best deals on flights from Ontario is to be flexible with your dates. Within each offer, you can compare prices for similar timeframes using our “Show flexible dates” feature. Depending on your destination, direct flights from Ontario may be more expensive. Airlines with strict bag policies or fees can also impact your costs. #### What is the best airline to fly from Ontario? At Expedia, we give you all the available options from our reputable partners. Select the airline that best suits your preferences and membership loyalties. You can fly from Ontario with: Frontier Airlines, Breeze Airways, American Airlines, Southwest Airlines, United, Alaska Airlines, Delta. #### What is the best month to fly from Ontario? One of the cheapest times to fly from Ontario airport(s) is May, based on the current list of flights available now. Prices on plane tickets vary considerably throughout the year due to availability and seasonal demand. #### Are there any last-minute flights from Ontario? Expedia is the place to find last-minute flights from Ontario, making it easy for you to compare prices on flights in the near future for different combinations of travel dates and from multiple airlines. We source some of the best deals for you and display some of the best offers available over the next 2 weeks. #### Why book your ticket with Expedia? Booking flights from Ontario with Expedia is the obvious choice to get low prices, save money, and see more value from every dollar spent. We show you some of the best deals happening right now and provide a vast inventory of airlines and flight routes to choose from, so you can find some of the cheapest flights from Ontario. You can customize your journey to your timeline, route preferences, budget, rewards programs, and more. #### Can I change/cancel my flight? Some flights can be changed or canceled, but fees and refunds will depend on the unique terms of your flight agreement. Airlines have different rules and restrictions for exchanging or refunding flights. For more information, go to your itinerary or visit our [customer service portal](https://www.expedia.com/service/). We recommend choosing flights with no change fees for the most flexibility. Filter by “Flexible change policies” to see flights with no change fees. \*Data specialists from both ARC and Expedia Group analysed ARC's global flight data to distil actionable information to help people save money on travel. While it's impossible to guarantee when to find the lowest prices, after examining the variables, we were able to observe trends. Analysis based on ARC, round-trip flight data between 1 October 2017 - 30 September 2018 for Economy and Premium cabin ATPs on a global basis. ## Travel information ## Flights from Ontario: Essential Travel Information | Cheapest flight from Ontario | $56 (roundtrip) | | ---------------------------------- | -------------------------------------------------------------------------------------------------------- | | Best airlines to fly from Ontario | Frontier Airlines, Breeze Airways, American Airlines, Southwest Airlines, United, Alaska Airlines, Delta | | Cheapest month to fly from Ontario | May | | Ontario IATA code | QLA | | Ontario Country/State | Los Angeles | | Airline ticket deals from Ontario | $56 - $139 | \*Flight schedules are subject to change. ## Explore a world of travel with Expedia - Lodging - Flights - Packages - Cars - Vacation Rentals - Other - [Hotels near Disneyland® Resort ](https://www.expedia.com/Disneyland-Resort-Hotels.0-l6025613-0.Travel-Guide-Filter-Hotels) - 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