Title: Cheap Flights to Washington County - Expedia.co.uk ![Lodging Image](https://a.travel-assets.com/travel-assets-manager/bex-affinities/lodging.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://a.travel-assets.com/travel-assets-manager/bex-affinities/lodging.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # £340 Cheap Flights to Washington County [View £340 flight on Tue, 21 Apr 2026](https://expedia.co.uk/Flights-Search?trip=oneway&leg1=from:DUB,to:STL,departure:21/04/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:339.19&airProductToken=AQpyCi8IxZIBEgMxNjAYgw0g64kBKNL3igMwp_iKAzhHQABYAWoGTE9XX0xIcgVHT1cyMwo_CMWSARIEODkyMRjriQEg8lwovfmKAzDe_YoDOE9AAFgBagZMT1dfTEhyCE9MWDVDNU00egoIwoIBEgQ4OTIxEgoIARABGAEqAkVJGAEiBAgBEAEoAigDKAQwDQ) - [Return](?flightType=roundtrip) - [One-way](?flightType=oneway) - [Multi-city](?flightType=multicity) ### Travellers Adults ChildrenAges 2 to 17 InfantsYounger than 2 EconomyPremium economyBusiness classFirst class Leaving from Going to Departing Returning Add a place to stay Add a car Direct flights only [Washington County Hotels](https://expedia.co.uk/Destinations-In-Washington-County.d553248635976433502.Hotel-Destinations)[Holiday Rentals in Washington County](https://expedia.co.uk/Destinations-In-Washington-County.d553248635976433502.Holiday-Rental-Destinations)[Washington County Car Hire](https://expedia.co.uk/Destinations-In-Washington-County.d553248635976433502.Car-Hire-Destinations)[Washington County Holidays](https://expedia.co.uk/Washington-County.d553248635976433502.Holidays-City-Breaks) ## Popular airlines to Washington County - ![](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 25% 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 rewards [Sign in](https://www.expedia.co.uk/login) ## Cheap round-trip flights to Washington County Prices were available within the past 7 days and start at £340 for one-way flights and £546 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Return ![British Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/BA.gif) Wed, 18 Mar - Wed, 25 Mar LHR London STL St. Louis £546 Return found 17 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:STL,departure:18/03/2026TANYT&leg2=from:STL,to:LHR,departure:25/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:545.99&airProductToken=AQqDAQpACMKCARIEMTU5NhjriQEg4poBKLP4hwMwz_yHAzhPQABYAWoFTk9CQUdyCU9MWDhDMUI0UHoKCMGCARIEMTU5Ngo_CMKCARIENjg0MxjimgEg8lwoof6HAzCe_4cDOE9AAVgBagVOT0JBR3IJT0xYOEMxQjRQegoIwYIBEgQ2ODQzCoMBCj8IwoIBEgQ1NjgzGPJcIKOxASi5zIgDMLPNiAM4T0AAWAFqBU5PQkFHcglPTFg4QzFCNFB6CgjBggESBDU2ODMKQAjCggESBDE1MzEYo7EBIOuJASiNzogDMLjSiAM4T0ABWAFqBU5PQkFHcglPTFg4QzFCNFB6CgjBggESBDE1MzESCggBEAEYASoCQkEYASIECAEQASgCKAMwDQ) ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Wed, 18 Mar - Wed, 25 Mar LHR London STL St. Louis £546 Return found 17 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:STL,departure:18/03/2026TANYT&leg2=from:STL,to:LHR,departure:25/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:545.99&airProductToken=AQpnCjEIwYIBEgI1MRjriQEgo7EBKNT3hwMwwPyHAzhCQABYAWoFQkFTSUNyCE9MWDhDMUI0CjIIwYIBEgQyMjY5GKOxASDyXCiq_YcDMJX-hwM4QkABWAFqBUJBU0lDcghPTFg4QzFCNApoCjIIwYIBEgQyNDg2GPJcIOKaASiay4gDMI7MiAM4QkAAWAFqBUJBU0lDcghPTFUxQzFCNAoyCMGCARIDNzMwGOKaASDriQEouM2IAzCY0YgDOEJAAVgBagVCQVNJQ3IIT0xVMUMxQjQSCggCEAEYAioCQUEYASIECAEQASgCKAMoBDAL) ![KLM](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/KL.gif) Wed, 11 Mar - Thu, 26 Mar LHR London STL St. Louis £551 Return found 2 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:STL,departure:11/03/2026TANYT&leg2=from:STL,to:LHR,departure:26/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:550.45&airProductToken=AQqnAQozCMuYARIEMTAwMBjriQEggJMBKIaohwMw1qiHAzhMQABYAWoFTElHSFRyCFZZMkVEQkxBCjEIy5gBEgM2MjMYgJMBIOBcKJephwMw262HAzhWQAFYAWoFTElHSFRyCFZZMkVEQkxBCj0Iy5gBEgQ1ODc0GOBcIPJcKPyuhwMw3a-HAzhWQAFYAWoFTElHSFRyCFZZMkVEQkxBegoIxJgBEgQ1ODc0Cn8KPQjLmAESBDcyODcY8lwg4Fwo8NSIAzDO1YgDOFZAAFgBagVMSUdIVHIIVlkyRURCTEF6CgjEmAESBDcyODcKPgjLmAESBDQ4MDUY4Fwg64kBKKbYiAMwgdyIAzhWQAFYAWoFTElHSFRyCFZZMkVEQkxBegoI1qYBEgQ0ODA1EgoIARABGAEqAktMGAEiBAgBEAEoAigDKAQwDQ) ![Air France](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AF.gif) Mon, 16 Mar - Mon, 30 Mar LHR London STL St. Louis £555 Return found 2 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:STL,departure:16/03/2026TANYT&leg2=from:STL,to:LHR,departure:30/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:554.75&airProductToken=AQqkAQoyCMGMARIEMTY4MRjriQEg4jAovOGHAzCR4ocDOExAAFgBagVMSUdIVHIIVlkyRURCTEEKLwjBjAESAjMyGOIwIOBcKLbjhwMw_-eHAzhWQAFYAWoFTElHSFRyCFZZMkVEQkxBCj0IwYwBEgQ1OTk0GOBcIPJcKNrxhwMwvPKHAzhWQAFYAWoFTElHSFRyCFZZMkVEQkxBegoIxJgBEgQ1OTk0Cn8KPQjBjAESBDU2MjIY8lwg4Fwo8IGJAzDOgokDOFZAAFgBagVMSUdIVHIIVlkyRURCTEF6CgjEmAESBDU2MjIKPgjBjAESBDM1NTUY4Fwg64kBKNGEiQMwxYiJAzhWQAFYAWoFTElHSFRyCFZZMkVEQkxBegoIxJgBEgQzNTU1EgoIARABGAEqAkFGGAEiBAgBEAEoAigDKAQwDQ) ![Iberia](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/IB.gif) Mon, 16 Mar - Mon, 30 Mar LHR London STL St. Louis £558 Return found 2 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:STL,departure:16/03/2026TANYT&leg2=from:STL,to:LHR,departure:30/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:557.35&airProductToken=AQqkAQoxCMmEARIDNzI2GOuJASCMGCi85ocDMM3nhwM4T0AAWAFqBUJBU0lDcghPTFg4QzFCNAowCMmEARIDMzQxGIwYIK4cKNTthwMwp_KHAzhPQAFYAWoFQkFTSUNyCE9MWDhDMUI0Cj0IyYQBEgQ4MDU1GK4cIPJcKLL1hwMw_PWHAzhPQAFYAWoFQkFTSUNyCE9MWDhDMUI0egoIwYIBEgQ4MDU1Cn8KPQjJhAESBDQ0OTcY8lwgrhwo5YWJAzC-hokDOE9AAFgBagVCQVNJQ3IIT0xYOEMxQjR6CgjBggESBDQ0OTcKPgjJhAESBDg1NTIYrhwg64kBKOSGiQMwuoqJAzhPQAFYAWoFQkFTSUNyCE9MWDhDMUI0egoIwYIBEgQ4NTUyEgoIARABGAEqAklCGAEiBAgBEAEoAigDKAQwDQ) ![Virgin Atlantic](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/VS.gif) Tue, 27 Oct - Mon, 2 Nov LHR London STL St. Louis £562 Return found 3 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:STL,departure:27/10/2026TANYT&leg2=from:STL,to:LHR,departure:02/11/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:561.55&airProductToken=AQrCAQo_CNamARIENzA1NBjriQEggJMBKInKmwMw1MqbAzhUQABYAWoFTElHSFRyCE9ZMlNKRExBegoIy5gBEgQ3MDU0Cj8I1qYBEgQzOTQ2GICTASDjtAEosNGbAzDH1ZsDOFRAAVgBagVMSUdIVHIIT1kyU0pETEF6CgjEmAESBDM5NDYKPgjWpgESBDE2NjMY47QBIPJcKPvWmwMw4debAzhUQAFYAWoFTElHSFRyCE9ZMlNKRExBegoIxJgBEgQxNjYzCrIBCj4I1qYBEgQxNjg4GPJcIOO0ASjCjZwDMJ6OnAM4VEAAWAFqBUxJR0hUcghPWTJFRERMQXoKCMSYARIEMTY4OAo-CNamARIEMzEyMBjjtAEgqVEo0o-cAzDEkJwDOFRAAVgBagVMSUdIVHIIT1kyRURETEF6CgjEmAESBDMxMjAKMAjWpgESAjI2GKlRIOuJASi2lZwDMNCYnAM4VEABWAFqBUxJR0hUcghPWTJFRERMQRIKCAEQARgBKgJWUxgBIgQIARABKAIoAygEMAE) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Wed, 18 Mar - Wed, 25 Mar LHR London STL St. Louis £563 Return found 17 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:STL,departure:18/03/2026TANYT&leg2=from:STL,to:LHR,departure:25/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:562.99&airProductToken=AQptCjQIxJgBEgIzNxjriQEg4FwolvuHAzDf_4cDOEVAAFgBaglNQUlOQkFTSUNyCFZZMkVEQkxBCjUIxJgBEgQxNDAzGOBcIPJcKMOAiAMwqoGIAzhFQAFYAWoJTUFJTkJBU0lDcghWWTJFREJMQQptCjUIxJgBEgQxMzkzGPJcIOBcKN_NiAMwyM6IAzhFQABYAWoJTUFJTkJBU0lDcghWWTJFREJMQQo0CMSYARICMzYY4Fwg64kBKK3PiAMwnNOIAzhFQAFYAWoJTUFJTkJBU0lDcghWWTJFREJMQRIKCAEQARgBKgJETBgBIgQIARABKAIoAygEMAE) ![British Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/BA.gif) Tue, 21 Apr - Wed, 29 Apr LHR London STL St. Louis £568 Return found 19 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:STL,departure:21/04/2026TANYT&leg2=from:STL,to:LHR,departure:29/04/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:567.07&airProductToken=AQozCjEIwoIBEgMyMjEY64kBIPJcKL35igMw3v2KAzhPQABYAWoFTk9CQUdyCE9MVTFDMUI0CjMKMQjCggESAzIyMBjyXCDriQEo29iLAzC73IsDOE9AAFgBagVOT0JBR3IIT0xVMUMxQjQSCggBEAEYASoCQkEYASIECAEQASgCKAMwDQ) ![Finnair](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AY.gif) Wed, 15 Apr - Mon, 20 Apr LHR London STL St. Louis £584 Return found 1 day ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:STL,departure:15/04/2026TANYT&leg2=from:STL,to:LHR,departure:20/04/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:583.99&airProductToken=AQqBAQo_CMGyARIEMzg4OBjriQEgrhwombWKAzCruYoDOE9AAFgBagZFTElHSFRyCE9MWDhDMUI0egoIwYIBEgQzODg4Cj4IwbIBEgQ0MDc2GK4cIPJcKPG6igMwxbuKAzhPQAFYAWoGRUxJR0hUcghPTFg4QzFCNHoKCMGCARIENDA3NgqBAQo-CMGyARIENDIwMRjyXCCuHCi98YoDMJvyigM4T0AAWAFqBkVMSUdIVHIIT0xYOEMxQjR6CgjBggESBDQyMDEKPwjBsgESBDM4ODcYrhwg64kBKP_yigMw2vaKAzhPQAFYAWoGRUxJR0hUcghPTFg4QzFCNHoKCMGCARIEMzg4NxIKCAIQARgCKgJBWRgBIgQIARABKAIoAygEMAE) ![British Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/BA.gif) Mon, 23 Nov - Mon, 30 Nov MAN Manchester STL St. Louis £587 Return found 4 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:MAN,to:STL,departure:23/11/2026TANYT&leg2=from:STL,to:MAN,departure:30/11/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:586.04&airProductToken=AQqrAQozCMKCARIEMTM2NRiMaCDriQEo5vWdAzCx9p0DOE9AAFgBagVOT0JBR3IJT0xYNUM1QjRQCjMIwoIBEgMxOTMY64kBIKOxASik950DMIb8nQM4T0ABWAFqBU5PQkFHcglPTFg1QzVCNFAKPwjCggESBDQzMzYYo7EBIPJcKOD8nQMwzf2dAzhPQAFYAWoFTk9CQUdyCU9MWDVDNUI0UHoKCMGCARIENDMzNhIKCAEQARgBKgJCQRgBIgQIARABKAIoAzAN) ![](https://forever.travel-assets.com/flex/flexmanager/images/2026/02/06/expedia-sale-2026-desktop-uk-fr-de.jpg?impolicy=fcrop&w=1400&h=600&q=mediumHigh) ## The Annual Holiday Sale Members save up to 40% on hotels and holiday homes. Plan this year’s big trip and save. [Book now](https://expedia.co.uk/cheap-deals?rfrr=FTG_SPRING_PROMO_) ## Top tips for booking flights to Washington County from UK ### Get ready to fly to Washington County Prepare your luggage and book your flights to Washington County with Expedia. We offer a seamless flight booking experience, with a wide range of Washington County plane tickets to choose from. If you need help finding some of the best deals for cheap flights to Washington County in 2026, we are always available to assist you. Book your flights to Washington County today and let the adventure begin! ### Find the best tickets to Washington County To find some of the best tickets to Washington County in 2026, use Expedia's powerful search engine to compare dates and the different departure and arrival airports for your trip. Whether you're after direct flights to Washington County or last-minute flights to Washington County, you can filter and sort your search results, making it easy to find the ideal flight to Washington County. ### Airlines fly to Washington County There are 20 different airlines that fly to Washington County including some of the most trusted names in the business. To book flights to Washington County with your favourite airline, take a look at Expedia's flight listings and try out different dates to find some of the best Washington County plane tickets. ### Find the cheapest flights to Washington County By booking early you may find some of the best deals for Washington County flights from the UK, including Washington County direct flights. You can usually find affordable and cheap flights to Washington County, whether one-way from £340 or round-trip from £546, with Expedia if you book your trip far enough in advance. ### Find the best airports for cheap flights to Washington County Try searching for different Washington County airports with Expedia to find some of the cheapest flights to Washington County. Flights from Dublin (DUB) to St. Louis (STL) usually have the lowest price from £340. ### Why book your flights to Washington County with Expedia Expedia offers great deals on Washington County air fares from £340 to cater to every budget. Not only is Expedia one of the top platforms to book flights to Washington County from the UK, it is also your one-stop shop for booking hotels, car rentals, and more. \*Prices and availability are subject to change. Additional terms apply. ## Washington County Flights Information | Airlines serving | Aer Lingus, Swiss International Air Lines, Lufthansa, Austrian Airlines, Air Canada, American Airlines, British Airways, Iberia, KLM, Air France, Virgin Atlantic, Delta, Finnair | | ---------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Roundtrip price | from £546 | ## Frequently asked questions ### How do I find cheap flights to Washington County that have flexible change policies? ### Which airlines fly to Washington County? ### How can I find cheap tickets to Washington County? ### How much is a flight to Washington County? ### What are the most popular airports to fly into in Washington County? ### When is the cheapest time to fly to Washington County? ### How much is a plane ticket to Washington County? ### What is the best time to go to Washington County? ### What months are the cheapest to book a flight to Washington County? - Top Flights Destinations - Top Washington County Hotels - Related Airlines ### Top Flight Destinations In Washington County - [Flights to Southern Illinois ](https://expedia.co.uk/Cheap-Flights-To-Southern-Illinois.d6233859.Travel-Guide-Flights) - [Flights to Central United States ](https://expedia.co.uk/Cheap-Flights-To-Central-United-States.d6209877.Travel-Guide-Flights) - [Flights to Southwest Illinois ](https://expedia.co.uk/Cheap-Flights-To-Southwest-Illinois.d6058943.Travel-Guide-Flights) ### Top Flight Destinations In World - [Flights to United Kingdom ](https://expedia.co.uk/Destinations-In-United-Kingdom.d190.Flight-Destinations) - [Flights to Australia ](https://expedia.co.uk/Destinations-In-Australia.d10.Flight-Destinations) - [Flights to Mexico ](https://expedia.co.uk/Destinations-In-Mexico.d117.Flight-Destinations) - [Flights to France ](https://expedia.co.uk/Destinations-In-France.d59.Flight-Destinations) - [Flights to Indonesia ](https://expedia.co.uk/Destinations-In-Indonesia.d81.Flight-Destinations) - [Flights to China ](https://expedia.co.uk/Destinations-In-China.d37.Flight-Destinations) - [Flights to Spain ](https://expedia.co.uk/Destinations-In-Spain.d166.Flight-Destinations) - [Flights to Switzerland ](https://expedia.co.uk/Destinations-In-Switzerland.d174.Flight-Destinations) - [Flights to Philippines ](https://expedia.co.uk/Destinations-In-Philippines.d145.Flight-Destinations) - [Flights to Sweden ](https://expedia.co.uk/Destinations-In-Sweden.d173.Flight-Destinations) - [Flights to Italy ](https://expedia.co.uk/Destinations-In-Italy.d86.Flight-Destinations) - [Flights to United States of America ](https://expedia.co.uk/Destinations-In-United-States-Of-America.d201.Flight-Destinations) - [Flights to Colombia ](https://expedia.co.uk/Destinations-In-Colombia.d38.Flight-Destinations) - [Flights to Germany ](https://expedia.co.uk/Destinations-In-Germany.d64.Flight-Destinations) - [Flights to Argentina ](https://expedia.co.uk/Destinations-In-Argentina.d8.Flight-Destinations) - [Flights to Brazil ](https://expedia.co.uk/Destinations-In-Brazil.d23.Flight-Destinations) - [Flights to India ](https://expedia.co.uk/Destinations-In-India.d80.Flight-Destinations) - [Flights to South Korea ](https://expedia.co.uk/Destinations-In-South-Korea.d94.Flight-Destinations) - [Flights to Thailand ](https://expedia.co.uk/Destinations-In-Thailand.d178.Flight-Destinations) - [Flights to Japan ](https://expedia.co.uk/Destinations-In-Japan.d89.Flight-Destinations) ### Top Washington County Hotels - [Drury Plaza Hotel Mt. Vernon ](https://expedia.co.uk/Mount-Vernon-Hotels-Drury-Inn-Suites-Mt-Vernon.h42021.Hotel-Information) - [Super 8 by Wyndham O'Fallon ](https://expedia.co.uk/Collinsville-Hotels-Super-8-By-Wyndham-OFallon.h11071.Hotel-Information) - [Drury Inn & Suites St. Louis O'Fallon, IL ](https://expedia.co.uk/Collinsville-Hotels-Drury-Inn-Suites-St-Louis-OFallon.h1544028.Hotel-Information) - [Comfort Suites Mount Vernon ](https://expedia.co.uk/Mount-Vernon-Hotels-Comfort-Suites-Mount-Vernon.h1387309.Hotel-Information) - [Quality Inn O'Fallon IL - St. Louis ](https://expedia.co.uk/Collinsville-Hotels-Quality-Inn-OFallon-I-64.h64675.Hotel-Information) - [La Quinta Inn & Suites by Wyndham O'Fallon, IL - St. Louis ](https://expedia.co.uk/Collinsville-Hotels-La-Quinta-Inn-Suites-By-Wyndham-OFallon.h201286.Hotel-Information) - [Holiday Inn Express & Suites - O'Fallon /Shiloh by IHG ](https://expedia.co.uk/Collinsville-Hotels-Holiday-Inn-Express-Suites-OFallon-Shiloh.h1037681.Hotel-Information) - [Baymont by Wyndham O'Fallon St. Louis Area ](https://expedia.co.uk/Collinsville-Hotels-Baymont-By-Wyndham-OFallon-St-Louis-Area.h60642.Hotel-Information) - [Holiday Inn Express & Suites Mount Vernon by IHG ](https://expedia.co.uk/Mount-Vernon-Hotels-Holiday-Inn-Express-Suites-Mount-Vernon.h16341844.Hotel-Information) - [Sleep Inn O'Fallon near I-64 ](https://expedia.co.uk/Collinsville-Hotels-Sleep-Inn.h168383.Hotel-Information) - [Comfort Inn & Suites O'Fallon - St. Louis Area ](https://expedia.co.uk/OFallon-Hotels-Regency-Inn-Suites.h42017.Hotel-Information) - [Fairgrounds Inn ](https://expedia.co.uk/Carbondale-Hotels-Fairgrounds-Inn.h6909469.Hotel-Information) - [Best Western Plus MidAmerica Hotel ](https://expedia.co.uk/Collinsville-Hotels-Best-Western-Plus-MidAmerica-Hotel.h2662110.Hotel-Information) - [Welcome Suites ](https://expedia.co.uk/Collinsville-Hotels-Welcome-Suites.h2141767.Hotel-Information) - [Candlewood Suites O Fallon by IHG ](https://expedia.co.uk/Collinsville-Hotels-Candlewood-Suites-O-Fallon.h1503826.Hotel-Information) - [Days Inn by Wyndham Mount Vernon ](https://expedia.co.uk/Mount-Vernon-Hotels-Days-Inn-By-Wyndham-Mount-Vernon.h423046.Hotel-Information) - [Hilton Garden Inn St. Louis Shiloh/O'Fallon IL ](https://expedia.co.uk/Collinsville-Hotels-Hilton-Garden-Inn-St-Louis-ShilohOFallon-IL.h2109882.Hotel-Information) ### Related Airlines - [Amber Air ](https://expedia.co.uk/Amber-Air-Flights.c0A.Travel-Guide-Airlines) - [BlueAir ](https://expedia.co.uk/BlueAir-Flights.c0B.Travel-Guide-Airlines) - [Catovair ](https://expedia.co.uk/Cobra-Aviation-Flights.c0C.Travel-Guide-Airlines) - [Darwin Airline SA Lugano ](https://expedia.co.uk/Darwin-Airline-SA-Lugano-Flights.c0D.Travel-Guide-Airlines) - [Evergreen International ](https://expedia.co.uk/Evergreen-International-Flights.c0E.Travel-Guide-Airlines) - [Ghadames Air Transport ](https://expedia.co.uk/Ghadames-Air-Transport-Flights.c0G.Travel-Guide-Airlines) - [Aircompany Kokshetau ](https://expedia.co.uk/AirCompany-Kokshetau-Flights.c0K.Travel-Guide-Airlines) - [Vietnam Air Service Co. ](https://expedia.co.uk/Vietnam-Air-Service-Co-Flights.c0V.Travel-Guide-Airlines) - [West Caribbean Costa Rica ](https://expedia.co.uk/West-Caribbean-Costa-Rica-Flights.c0W.Travel-Guide-Airlines) - [Olympus Airways ](https://expedia.co.uk/Olympus-Airways-Flights.c11.Travel-Guide-Airlines) ## Trending flights to Washington County These prices were available within the past 7 days. Prices quoted are per person, return, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Return ![British Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/BA.gif) Wed, 18 Mar - Wed, 25 Mar LHR London STL St. Louis £546 Return found 17 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:STL,departure:18/03/2026TANYT&leg2=from:STL,to:LHR,departure:25/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:545.99&airProductToken=AQqDAQpACMKCARIEMTU5NhjriQEg4poBKLP4hwMwz_yHAzhPQABYAWoFTk9CQUdyCU9MWDhDMUI0UHoKCMGCARIEMTU5Ngo_CMKCARIENjg0MxjimgEg8lwoof6HAzCe_4cDOE9AAVgBagVOT0JBR3IJT0xYOEMxQjRQegoIwYIBEgQ2ODQzCoMBCj8IwoIBEgQ1NjgzGPJcIKOxASi5zIgDMLPNiAM4T0AAWAFqBU5PQkFHcglPTFg4QzFCNFB6CgjBggESBDU2ODMKQAjCggESBDE1MzEYo7EBIOuJASiNzogDMLjSiAM4T0ABWAFqBU5PQkFHcglPTFg4QzFCNFB6CgjBggESBDE1MzESCggBEAEYASoCQkEYASIECAEQASgCKAMwDQ) \*Available to Expedia members.