Title: $59 Cheap Flights to Southwest Illinois, IL - Expedia.com ![](https://images.trvl-media.com/place/6058943/ba13542c-304d-47c2-bad4-d7c83a7389e4.jpg?impolicy=fcrop&w=1200&h=500&q=medium) Photo by Southernmost Illinois Tourism Bureau ![](https://images.trvl-media.com/place/6058943/ba13542c-304d-47c2-bad4-d7c83a7389e4.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # $59 Cheap Flights to Southwest Illinois, IL [View $59 flight on Wed, Apr 29, 2026](https://expedia.com/Flights-Search?trip=oneway&leg1=from:ORD,to:STL,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:58.39&airProductToken=AQozCjEIwYIBEgQzNjIyGK4cIPJcKMLUiwMwl9WLAzhCQABYAWoFQkFTSUNyCE9WQUlLU0JYEgoIARABGAEqAkFBGAEiBAgBEAEoAigDKAQwCw) [Southwest Illinois Travel Guide](https://expedia.com/Southwest-Illinois.dx6058943)[Hotels in Southwest Illinois](https://expedia.com/Southwest-Illinois-Hotels.d6058943.Travel-Guide-Hotels)[Car Rentals in Southwest Illinois](https://expedia.com/Car-Rentals-In-Southwest-Illinois.d6058943.Car-Rental-Guide)[Southwest Illinois Vacation Packages](https://expedia.com/Southwest-Illinois.d6058943.Destination-Travel-Guides) ## Popular airlines - ![](https://a.travel-assets.com/air/airlines/lf_sq.svg) Contour Airlines - ![](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) ## How much is the cheapest flight to Southwest Illinois? Prices were available within the past 7 days and start at $59 for one-way flights and $117 for 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 - Fri, May 8 IAH Houston STL St. Louis $140 Roundtrip found 2 hours ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:IAH,to:STL,departure:5/2/2026TANYT&leg2=from:STL,to:IAH,departure:5/8/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:139.96&airProductToken=AQpgCi4IxnISBDE0MTgYiDggzHAo9faLAzCM-IsDOEVAAFgBagRQQ18xcgdLMjFQWFA0Ci4IxnISBDI2MzUYzHAg8lwo-_mLAzCj-4sDOEVAAFgBagRQQ18xcgdLMjFQWFA0CmIKLwjGchIEMjAxNxjyXCCLkAEo6r2MAzDCv4wDOEVAAFgBagRQQ18xcgdLMjFQWFA0Ci8IxnISBDE0OTAYi5ABIIg4KLfDjAMw_cSMAzhFQABYAWoEUENfMXIHSzIxUFhQNBIKCAEQARgBKgJGORgBIgQIARABKAIoAzAN) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Tue, Apr 28 - Tue, May 5 AUS Austin STL St. Louis $225 Roundtrip found 1 day ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:AUS,to:STL,departure:4/28/2026TANYT&leg2=from:STL,to:AUS,departure:5/5/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:224.40&airProductToken=AQpFCiEIxJgBEgQxNDkxGICVASDgXCiLzIsDMJXNiwM4RUAAWAEKIAjEmAESBDE0MDMY4Fwg8lwozM2LAzC0zosDOEVAAVgBCkUKIAjEmAESBDE1MjQY8lwg4Fwo9JSMAzDYlYwDOEVAAFgBCiEIxJgBEgQyODg2GOBcIICVASiVlowDMK-XjAM4RUABWAESCggBEAEYASoCREwYASIECAEQASgEMAE) ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Tue, May 19 - Wed, May 20 STL St. Louis MWA Marion $278 Roundtrip found 4 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:STL,to:MWA,departure:5/19/2026TANYT&leg2=from:MWA,to:STL,departure:5/20/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:277.61&airProductToken=AQpbCjAIwYIBEgQ0MTM1GPJcIK4cKOOzjQMwu7SNAzhPQABYAWoETUFJTnIIT1ZBSUtTTTMKJwjMjAESBDMwNTQYrhwgzAUojLeNAzDrt40DOEtAAVgBcgVLN0NOWApbCicIzIwBEgQzMDUzGMwFIK4cKI7CjQMw8sKNAzhLQABYAXIFSzdDTlgKMAjBggESBDIxMjYYrhwg8lwo08SNAzCnxY0DOE9AAVgBagRNQUlOcghPVkFJS1NNMxIKCAEQARgBKgJMRhgBIgQIARABKAIoAygEMAE) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Thu, Jul 2 - Sun, Jul 5 IAH Houston PAH Paducah $293 Roundtrip just found [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:IAH,to:PAH,departure:7/2/2026TANYT&leg2=from:PAH,to:IAH,departure:7/5/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:292.20&airProductToken=AQo4CjYI1YIBEgQ1MDQ1GIg4II84KNuokQMw2KmRAzhOQABYAWoKMV9iYXNpY2Vjb3IIVEVBMkFBQk4KOAo2CNWCARIENTA1NRiPOCCIOCiFx5EDMJHIkQM4TkAAWAFqCjFfYmFzaWNlY29yCFRFQTJBQUJOEgoIARABGAEqAlVBGAEiBAgBEAEoAigDKAQwCw) ![Alaska Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AS.gif) Sat, May 2 - Sat, May 9 AUS Austin STL St. Louis $583 Roundtrip found 3 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:AUS,to:STL,departure:5/2/2026TANYT&leg2=from:STL,to:AUS,departure:5/9/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:582.40&airProductToken=AQpfCi4IwaYBEgM1OTUYgJUBIJIBKJTziwMwq_WLAzhYQABYAWoCU1ZyCE9IMk9YVUJOCi0IwaYBEgMzMTQYkgEg8lwo5_WLAzDi94sDOFhAAVgBagJTVnIIT0gyT1hVQk4SCggBEAEYASoCQVMYASIECAEQASgCKAMoBDAB) ## Alternative airports Prices were available within the past 7 days. Prices and availability are subject to change. [](https://www.expedia.com/Flights-Search?leg1=from:CMH,to:STL,departure:4/22/2026TANYT&leg2=from:STL,to:CMH,departure:4/24/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) STL Lambert-St. Louis Intl. Cheapest [Flights from $325 ](https://www.expedia.com/Flights-Search?leg1=from:CMH,to:STL,departure:4/22/2026TANYT&leg2=from:STL,to:CMH,departure:4/24/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) ## Frequently asked questions ### What month is the cheapest to fly to Southwest Illinois? ### Which US cities have the cheapest flights to Southwest Illinois? ### Which US cities fly direct to Southwest Illinois? > - New York > - Washington > - Dallas > - Boston > - Phoenix ### How to find a cheap flight to Southwest Illinois? ### How to get a cheap last-minute flight to Southwest Illinois? ### How far in advance should I book a flight to Southwest Illinois? ### Which day of the week is the cheapest day to buy a plane ticket to Southwest Illinois? ### Which airlines fly to Southwest Illinois? > - American Airlines - 1,079 flights to Southwest Illinois each month, including 927 flights to Lambert-St. Louis Intl. Airport (STL) per month. > - Delta Air Lines - 723 flights to Southwest Illinois each month, including 637 flights to Lambert-St. Louis Intl. Airport (STL) per month. ### Where do you fly into Southwest Illinois? ### Can I save money by booking a Southwest Illinois trip package? ### Can I change or cancel my flight to Southwest Illinois? \*Flight schedules are subject to change. \*Available to One Key members. ## Travel information | Destination airport | Lambert-St. Louis Intl. | | ----------------------------- | ----------------------- | | Destination airport IATA code | STL | | Destination city name | St. Louis | | Roundtrip price | $63 | ## Trending flights to Southwest Illinois Prices were available within the past 7 days and start at $59 for one-way flights and $117 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Roundtrip ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Tue, May 5 - Wed, May 6 ORD Chicago STL St. Louis $117 Roundtrip found 1 hour ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ORD,to:STL,departure:5/5/2026TANYT&leg2=from:STL,to:ORD,departure:5/6/2026TANYT&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=AQozCjEIwYIBEgQxOTI2GK4cIPJcKP2WjAMwz5eMAzhCQABYAWoFQkFTSUNyCE9WQUlLU0JYEgoIARABGAEqAkFBGAEiBAgBEAEoAigDKAQwCw) ## Explore a world of travel with Expedia - Lodging - Flights - Packages - Cars - Vacation Rentals - [Addieville Hotels ](https://www.expedia.com/Addieville-Hotels.d3000420807.Travel-Guide-Hotels) - [Motels in Addieville ](https://www.expedia.com/Addieville-Motels.d3000420807-aaMotels.Travel-Guide-Accommodation) - [Hotels near Rainbow Ranch Petting Zoo ](https://www.expedia.com/Rainbow-Ranch-Petting-Zoo-Hotels.0-l6186924-0.Travel-Guide-Filter-Hotels) - 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