Title: $37 Cheap flights from Belleville, IL - 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) # $37 Cheap flights from Belleville, IL [View $37 flight on Wed, Apr 8, 2026](https://expedia.com/Flights-Search?trip=oneway&leg1=from:STL,to:DEN,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:36.98&airProductToken=AQowCi4IxnISBDQ1NjcY8lwgg2ko7OuJAzCF7YkDOEVAAFgBagRQQ18xcgdLMjFYWFMyEgoIARABGAEqAkY5GAEiBAgBEAEoAigDMA0) [Belleville Travel Guide](https://expedia.com/Belleville.dx55581)[Hotels in Belleville](https://expedia.com/Belleville-Hotels.d55581.Travel-Guide-Hotels)[Car Rentals in Belleville](https://expedia.com/Car-Rentals-In-Belleville.d55581.Car-Rental-Guide)[Belleville Vacation Packages](https://expedia.com/Belleville.d55581.Destination-Travel-Guides) ## Popular airlines from Belleville - ![](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_UA.svg) United - ![](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_F9.svg) Frontier Airlines - ![](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_AC.svg) Air Canada - ![](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 Belleville Nonstop Carry-on included Lower price than typical - St. Louis (STL)Las Vegas (LAS) Thu, Apr 9 Mon, Apr 13 ![Southwest Airlines](https://a.travel-assets.com/air/airlines/wn_sq.svg)Southwest Airlines • Nonstop --- 4-day trip found 17 hours ago 25% less than typical $328 [](https://www.expedia.com/Flights-Search?leg1=from:STL,to:LAS,departure:4/9/2026TANYT&leg2=from:LAS,to:STL,departure:4/13/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&airOfferToken=v5-sos-2c4b038663e44e65915c9e7705c1de76-4082-1-st-v5-sos-2c4b038663e44e65915c9e7705c1de76-3891-1~8.S.1~AQoCCAESBwjUBBABGAEoAlgCcABwAHoDYmZzegNiZnOIAbLPj12qAQcKA1NUTBAAsgEHCgNMQVMQAA~AQoxCi8I15wBEgQ0NDc0GPJcIIuQASjg94kDMLL5iQM4RkAAWAFqA1dHQXIHRlpOVk4yRhIKCAEQARgBKgJXThgBIgQIARABKAIoAygEMAE.AQpoCjIIwYIBEgMzMjMYi5ABIKOxASjjpooDMIOoigM4QkAAWAFqBUJBU0lDcghPV0FaWk5CVgoyCMGCARIEMjk0MhijsQEg8lwolamKAzCCqooDOEJAAVgBagVCQVNJQ3IIT1dBWlpOQlYSCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAL&medianPrice=564.00&displayPrice=327.60&src=dflp) - St. Louis (STL)Phoenix (PHX) Fri, Mar 27 Tue, Mar 31 ![Southwest Airlines](https://a.travel-assets.com/air/airlines/wn_sq.svg)Southwest Airlines • Nonstop --- 4-day trip found 10 hours ago 25% less than typical $420 [](https://www.expedia.com/Flights-Search?leg1=from:STL,to:PHX,departure:3/27/2026TANYT&leg2=from:PHX,to:STL,departure:3/31/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&airOfferToken=v5-sos-215e08b4070e4cef940f515dbbc92dd3-4092-1-st-v5-sos-215e08b4070e4cef940f515dbbc92dd3-4024-1~8.S.1~AQoCCAESBwjUBBABGAEoAlgCcABwAHoDYmZzegNiZnOIAZuLkV2QAQGQAQGqAQcKA1NUTBAAsgEHCgNQSFgQAA~AQoxCi8I15wBEgQyODQ3GPJcIO-5ASjn3YgDML7fiAM4R0AAWAFqA1dHQXIHR0xOMFcyRhIKCAEQARgBKgJXThgBIgQIARABKAIoAygEMAE.AQpnCjIIwYIBEgQzMjA1GO-5ASCuHCi7lIkDMJGWiQM4QkAAWAFqBUJBU0lDcghRVkFJS1NCWAoxCMGCARIEMzM1NRiuHCDyXCiwmIkDMIOZiQM4QkABWAFqBUJBU0lDcghPVkFJS1NCWBIKCAEQARgBKgJBQRgBIgQIARABKAIoAygEMAs&medianPrice=701.00&displayPrice=419.19&src=dflp) - St. Louis (STL)Phoenix (PHX) Sun, Mar 22 Sat, Mar 28 ![Southwest Airlines](https://a.travel-assets.com/air/airlines/wn_sq.svg)Southwest Airlines • Nonstop --- 6-day trip found 8 hours ago 35% less than typical $450 [](https://www.expedia.com/Flights-Search?leg1=from:STL,to:PHX,departure:3/22/2026TANYT&leg2=from:PHX,to:STL,departure:3/28/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&airOfferToken=v5-sos-710b5386d3524b6a9e27ff17549cfb61-260-1~8.S.1~AQoCCAESBwjUBBABGAEoAlgCcAB6A2Jmc4gBoLmRXaoBBwoDU1RMEACyAQcKA1BIWBAA~AQoxCi8I15wBEgQyODQ3GPJcIO-5ASjqpYgDMMGniAM4R0AAWAFqA1dHQXIHR0xOMFcyRgpfCi4I15wBEgMxMTYY77kBIINpKPzqiAMw5euIAzhaQABYAWoDV0dBcgdaREEwVzJGCi0I15wBEgM0MjQYg2kg8lwo7OyIAzDk7YgDOFpAAVgBagNXR0FyB1pEQTBXMkYSCggBEAEYASoCV04YASIECAEQASgCKAMoBDAB&medianPrice=911.00&displayPrice=449.59&src=dflp) - St. Louis (STL)Phoenix (PHX) Mon, Mar 16 Sat, Mar 21 ![Southwest Airlines](https://a.travel-assets.com/air/airlines/wn_sq.svg)Southwest Airlines • Nonstop --- 4-day trip found 12 hours ago 35% less than typical $450 [](https://www.expedia.com/Flights-Search?leg1=from:STL,to:PHX,departure:3/16/2026TANYT&leg2=from:PHX,to:STL,departure:3/21/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&airOfferToken=v5-sos-fd8ca03d851044e5a89c0defb3a6f976-2273-1~8.S.1~AQoCCAESBwjUBBABGAEoAlgCcAB6A2Jmc4gB0c6QXaoBBwoDU1RMEACyAQcKA1BIWBAA~AQoxCi8I15wBEgQzNTg4GPJcIO-5ASje6IcDMLDqhwM4R0AAWAFqA1dHQXIHR0xOMFcyRgphCi8I15wBEgQzNTUyGO-5ASCOAyi1nIgDMNCdiAM4WkAAWAFqA1dHQXIHWkRBMFcyRgouCNecARIEMzAxMhiOAyDyXCiQoIgDMNugiAM4WkABWAFqA1dHQXIHWkRBMFcyRhIKCAEQARgBKgJXThgBIgQIARABKAIoAygEMAE&medianPrice=895.00&displayPrice=449.59&src=dflp) - St. Louis (STL)New York (LGA) Mon, Mar 30 Fri, Apr 3 ![Southwest Airlines](https://a.travel-assets.com/air/airlines/wn_sq.svg)Southwest Airlines • Nonstop --- 4-day trip found 21 hours ago 20% less than typical $336 [](https://www.expedia.com/Flights-Search?leg1=from:STL,to:LGA,departure:3/30/2026TANYT&leg2=from:LGA,to:STL,departure:4/3/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&airOfferToken=v5-sos-3552a1b8b9674c37bbb07fe4d31ccb92-3456-1-st-v5-sos-3552a1b8b9674c37bbb07fe4d31ccb92-3404-1~8.S.1~AQoCCAESBwjUBBABGAEoAlgCcABwAHoDYmZzegNiZnOIAbbQjl2QAQWQASeqAQcKA1NUTBAAsgEHCgNMR0EQAQ~AQovCi0I15wBEgMzNDMY8lwgywEo4P-IAzDsgIkDOEpAAFgBagNXR0FyB0paTlZOMkUSCggBEAEYASoCV04YASIECAEQASgCKAMoBDAB.AQptCjQIxJgBEgM5NjQYywEg4FwopbKJAzDIs4kDOEVAAFgBaglNQUlOQkFTSUNyCFRBVk5BMEJDCjUIxJgBEgQxNDAzGOBcIPJcKMO0iQMwqrWJAzhFQAFYAWoJTUFJTkJBU0lDcghUQVZOQTBCQxIKCAEQARgBKgJETBgBIgQIARABKAIoAygEMAE&medianPrice=553.00&displayPrice=335.60&src=dflp) - St. Louis (STL)New York (LGA) Fri, Apr 17 Mon, Apr 20 ![Southwest Airlines](https://a.travel-assets.com/air/airlines/wn_sq.svg)Southwest Airlines • Nonstop --- 3-day trip found 23 hours ago 35% less than typical $260 [](https://www.expedia.com/Flights-Search?leg1=from:STL,to:LGA,departure:4/17/2026TANYT&leg2=from:LGA,to:STL,departure:4/20/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&airOfferToken=v5-sos-2a67429f181e4a5fa87ed05919d99947-1621-1~8.S.1~AQoCCAESBwjUBBABGAEoAlgCcAB6A2Jmc4gB746OXZABHqoBBwoDU1RMEACyAQcKA0xHQRAA~AQowCi4I15wBEgQ0NDc3GPJcIMsBKKrKigMwtsuKAzhKQABYAWoDV0dBcgdKTE5XVDJFCl8KLgjXnAESBDI5MTMYywEgoQMo9fKKAzCV9IoDOFZAAFgBagNXR0FyB1ZMTlVUMkUKLQjXnAESAzgwNhihAyDyXCjN94oDMJ34igM4VkABWAFqA1dHQXIHVkJOVk4yRBIKCAEQARgBKgJXThgBIgQIARABKAIoAygEMAE&medianPrice=500.00&displayPrice=259.60&src=dflp) - St. Louis (STL)New York (LGA) Thu, Apr 16 Tue, Apr 21 ![Southwest Airlines](https://a.travel-assets.com/air/airlines/wn_sq.svg)Southwest Airlines • Nonstop --- 5-day trip found 4 hours ago 30% less than typical $284 [](https://www.expedia.com/Flights-Search?leg1=from:STL,to:LGA,departure:4/16/2026TANYT&leg2=from:LGA,to:STL,departure:4/21/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&airOfferToken=v5-sos-e14bff1af9a448878ca47463d571303c-2306-1~8.S.1~AQoGCAEQ7bUYEgcI1AQQARgBKAJYAnAAegNiZnOIAYG2kl2qAQcKA1NUTBAAsgEHCgNMR0EQAA~AQowCi4I15wBEgQ0NDc3GPJcIMsBKIq_igMwlsCKAzhKQABYAWoDV0dBcgdKWk5WTjJFCjAKLgjXnAESBDI5NDAYywEg8lwop_iKAzDR-YoDOERAAFgBagNXR0FyB0RCTlZOMkUSCggBEAEYASoCV04YASIECAEQASgCKAMoBDAB&medianPrice=519.00&displayPrice=283.80&src=dflp) - St. Louis (STL)Denver (DEN) Sun, Apr 19 Sun, Apr 26 ![Southwest Airlines](https://a.travel-assets.com/air/airlines/wn_sq.svg)Southwest Airlines • Nonstop --- 7-day trip found 2 hours ago 25% less than typical $237 [](https://www.expedia.com/Flights-Search?leg1=from:STL,to:DEN,departure:4/19/2026TANYT&leg2=from:DEN,to:STL,departure:4/26/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&airOfferToken=v5-sos-b76b9db244c74f11943ec517c082398c-114-1~8.S.1~AQoCCAESBwjUBBABGAEoAlgCcAB6A2Jmc4gBl-ySXaoBBwoDU1RMEACyAQcKA0RFThAA~AQowCi4I15wBEgQ0NDU0GPJcIINpKIPhigMwj-KKAzhaQABYAWoDV0dBcgdaTk5XVDJFCjAKLgjXnAESBDIwOTYYg2kg8lwopLCLAzChsYsDOFpAAFgBagNXR0FyB1pOTldUMkUSCggBEAEYASoCV04YASIECAEQASgCKAMoBDAB&medianPrice=416.00&displayPrice=236.79&src=dflp) - St. Louis (STL)Denver (DEN) Fri, Apr 17 Tue, Apr 21 ![Southwest Airlines](https://a.travel-assets.com/air/airlines/wn_sq.svg)Southwest Airlines • Nonstop --- 4-day trip found 13 hours ago 25% less than typical $211 [](https://www.expedia.com/Flights-Search?leg1=from:STL,to:DEN,departure:4/17/2026TANYT&leg2=from:DEN,to:STL,departure:4/21/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&airOfferToken=v5-sos-5012ccf3c53141fbb3e88dc13e4c2d8f-246-1~8.S.1~AQoCCAESBwjUBBABGAEoAlgCcAB6A2Jmc4gBjLeQXaoBBwoDU1RMEACyAQcKA0RFThAA~AQowCi4I15wBEgQ0NDU5GPJcIINpKLHQigMwvdGKAzhaQABYAWoDV0dBcgdaTk5XVDJFCjAKLgjXnAESBDIxMDIYg2kg8lwo2f2KAzDl_ooDOEpAAFgBagNXR0FyB0pCTlZIMkUSCggBEAEYASoCV04YASIECAEQASgCKAMoBDAB&medianPrice=363.00&displayPrice=210.80&src=dflp) ## Cheapest flights from Belleville 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) Wed, Apr 8 - Mon, Apr 13 STL St. Louis DEN Denver $77 Roundtrip found 7 hours ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:STL,to:DEN,departure:4/8/2026TANYT&leg2=from:DEN,to:STL,departure:4/13/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:76.96&airProductToken=AQowCi4IxnISBDQ1NjcY8lwgg2ko7OuJAzCF7YkDOEVAAFgBagRQQ18xcgdLMjFYWFMyCjAKLgjGchIEMzMwMhiDaSDyXCiYnooDMJifigM4RUAAWAFqBFBDXzFyB1owN05YUzkSCggBEAEYASoCRjkYASIECAEQASgCKAMwDQ) ![Frontier Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/F9.gif) Sat, May 9 - Mon, May 11 STL St. Louis DEN Denver $79 Roundtrip found 12 hours ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:STL,to:DEN,departure:5/9/2026TANYT&leg2=from:DEN,to:STL,departure:5/11/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:78.96&airProductToken=AQowCi4IxnISBDQ1NjcY8lwgg2koyMiMAzDhyYwDOEVAAFgBagRQQ18xcgdLMjFTWFMyCjAKLgjGchIEMzMwMhiDaSDyXCjI3YwDMMzejAM4RUAAWAFqBFBDXzFyB1oyMU5YUzISCggBEAEYASoCRjkYASIECAEQASgCKAMwDQ) ![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 STL St. Louis DEN Denver $81 Roundtrip found 2 hours ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:STL,to:DEN,departure:4/1/2026TANYT&leg2=from:DEN,to:STL,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:80.96&airProductToken=AQowCi4IxnISBDQ1NjcY8lwgg2kojJ2JAzClnokDOEVAAFgBagRQQ18xcgdLMjFYWFMyCjAKLgjGchIEMzMwMhiDaSDyXCj45YkDMPjmiQM4RUAAWAFqBFBDXzFyB1owN1hYUzkSCggBEAEYASoCRjkYASIECAEQASgCKAMwDQ) ![Frontier Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/F9.gif) Wed, Apr 1 - Sat, Apr 4 STL St. Louis DEN Denver $83 Roundtrip found 11 hours ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:STL,to:DEN,departure:4/1/2026TANYT&leg2=from:DEN,to:STL,departure:4/4/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:82.96&airProductToken=AQowCi4IxnISBDQ1NjcY8lwgg2kojJ2JAzClnokDOEVAAFgBagRQQ18xcgdLMjFYWFMyCjAKLgjGchIEMzMwMhiDaSDyXCj4uIkDMPi5iQM4RUAAWAFqBFBDXzFyB1oyMVNYUzISCggBEAEYASoCRjkYASIECAEQASgCKAMwDQ) ![Frontier Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/F9.gif) Sat, Apr 25 - Mon, Apr 27 STL St. Louis DEN Denver $84 Roundtrip just found [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:STL,to:DEN,departure:4/25/2026TANYT&leg2=from:DEN,to:STL,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:83.96&airProductToken=AQowCi4IxnISBDQ1NjcY8lwgg2kojauLAzCmrIsDOEVAAFgBagRQQ18xcgdaMjFTWFMyCjAKLgjGchIEMzMwMhiDaSDyXCicwIsDMKDBiwM4RUAAWAFqBFBDXzFyB1owN05YUzkSCggBEAEYASoCRjkYASIECAEQASgCKAMwDQ) ![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 STL St. Louis DEN Denver $86 Roundtrip found 11 hours ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:STL,to:DEN,departure:4/13/2026TANYT&leg2=from:DEN,to:STL,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:85.96&airProductToken=AQowCi4IxnISBDQ1NjcY8lwgg2koj6SKAzCopYoDOEVAAFgBagRQQ18xcgdaMDdOWFM5CjAKLgjGchIEMzMwMhiDaSDyXCixxIoDMLXFigM4RUAAWAFqBFBDXzFyB1oyMVJYUzISCggBEAEYASoCRjkYASIECAEQASgCKAMwDQ) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Tue, Jun 2 - Wed, Jun 10 STL St. Louis DEN Denver $185 Roundtrip just found [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:STL,to:DEN,departure:6/2/2026TANYT&leg2=from:DEN,to:STL,departure:6/10/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:184.80&airProductToken=AQo4CjYI1YIBEgQxNDgzGPJcIINpKPzUjgMwl9aOAzhOQABYAWoKMV9iYXNpY2Vjb3IIS0FVMkpLQlMKNwo1CNWCARIDMjE0GINpIPJcKKWxjwMwqbKPAzhOQABYAWoKMV9iYXNpY2Vjb3IIS0FVMkpLQlMSCggBEAEYASoCVUEYASIECAEQASgCKAMoBDAL) ![Southwest Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/wn.gif) Sat, Apr 18 - Thu, Apr 23 STL St. Louis SAN San Diego $198 Roundtrip found 1 day ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:STL,to:SAN,departure:4/18/2026TANYT&leg2=from:SAN,to:STL,departure:4/23/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:197.78&airProductToken=AQpiCi8I15wBEgQyMDgyGPJcIMejASj82ooDMP7bigM4VkAAWAFqA1dHQXIHVkpBVUgyRgovCNecARIEMjQxMBjHowEgkmgosNyKAzD93YoDOFZAAVgBagNXR0FyB1ZKQVVIMkYSCggBEAEYASoCV04YASIECAEQASgCKAMoBDAB) ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Sat, May 16 - Sat, May 30 STL St. Louis DFW Dallas $201 Roundtrip found 3 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:STL,to:DFW,departure:5/16/2026TANYT&leg2=from:DFW,to:STL,departure:5/30/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:200.78&airProductToken=AQo0CjIIwYIBEgQyOTQ1GPJcIKOxASivlo0DMKSXjQM4QkAAWAFqBUJBU0lDcghPV0FJSlNCWBIKCAEQARgBKgJBQRgBIgQIARABKAIoAygEMAs) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Sat, Apr 18 - Sat, Apr 25 STL St. Louis DEN Denver $217 Roundtrip just found [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:STL,to:DEN,departure:4/18/2026TANYT&leg2=from:DEN,to:STL,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:216.40&airProductToken=AQpuCjUIxJgBEgQyMzYzGPJcIPISKJDWigMw19eKAzhFQABYAWoJTUFJTkJBU0lDcghWQVdOSDFCRwo1CMSYARIEMTU1MxjyEiCDaSiA2IoDMNzYigM4RUABWAFqCU1BSU5CQVNJQ3IIVkFXTkgxQkcKbgo1CMSYARIEMjg0NxiDaSDMfCiLp4sDMICoiwM4RUAAWAFqCU1BSU5CQVNJQ3IIVkFXTkgxQkcKNQjEmAESBDE2MDUYzHwg8lwo4qiLAzC-qYsDOEVAAVgBaglNQUlOQkFTSUNyCFZBV05IMUJHEgoIARABGAEqAkRMGAEiBAgBEAEoAigDKAQwAQ) ![](https://forever.travel-assets.com/flex/flexmanager/images/2026/02/06/expedia-sale-2026-desktop-us-ca.jpg?impolicy=fcrop&w=1400&h=600&q=mediumHigh) ## The Annual Vacation Sale Members save up to 40% on hotels and homes. Plan this year’s big trip and save. [Book now](https://expedia.com/deals?rfrr=FTG_SPRING_PROMO_) ## How to Find Cheap Flights from Belleville, IL #### How much is a flight from Belleville? This week, flights from Belleville are available between $77 – $217\. #### How to find cheap flights from Belleville? Expedia makes it easy to compare cheap flights from Belleville to many destinations. Check out excellent deals on domestic and international flights from Belleville. 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 Belleville? 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 Belleville 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 Belleville may be more expensive. Airlines with strict bag policies or fees can also impact your costs. #### What is the best airline to fly from Belleville? 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 Belleville with: Frontier Airlines, United, Southwest Airlines, American Airlines, Delta. #### What is the best month to fly from Belleville? One of the cheapest times to fly from Belleville airport(s) is April, 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 Belleville? Expedia is the place to find last-minute flights from Belleville, 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 Belleville 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 Belleville. 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 Belleville: Essential Travel Information | Cheapest flight from Belleville | $77 (roundtrip) | | ------------------------------------- | ----------------------------------------------------------------------- | | Best airlines to fly from Belleville | Frontier Airlines, United, Southwest Airlines, American Airlines, Delta | | Cheapest month to fly from Belleville | April | | Belleville IATA code | STL | | Belleville Country/State | Illinois | | Airline ticket deals from Belleville | $77 - $217 | \*Flight schedules are subject to change. ## Explore a world of travel with Expedia - Lodging - Flights - Packages - Cars - Vacation Rentals - Other - [Hotels near St. Clair County Historical Society ](https://www.expedia.com/St-Clair-County-Historical-Society-Hotels.0-l553248621532655930-0.Travel-Guide-Filter-Hotels) - 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