Title: Cheap United fights from St. Louis to Kailua-Kona - Expedia.ca ![Hapuna Beach State Park showing a sunset, rugged coastline and general coastal views](https://images.trvl-media.com/place/6064005/a9ba1d9b-ff25-40cd-acf6-43b6435bc5d3.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/6064005/a9ba1d9b-ff25-40cd-acf6-43b6435bc5d3.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # Cheap United fights from St. Louis (STL) to Kailua-Kona (KOA) - [Roundtrip](?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 - ![notification illustration](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\* - ![deals illustration](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\* - ![trophy illustration](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.ca/login) Flight from St. Louis to Kailua-Kona (STL - KOA) route information | Origin airport | Lambert-St. Louis Intl. | | --- | --- | | Destination airport | Kona Intl. | | Distance | 6531 km | ![](https://forever.travel-assets.com/flex/flexmanager/images/2025/11/05/BEX-BF-25_CA_1_Desktop.jpg?impolicy=fcrop&w=1400&h=600&q=mediumHigh) ## Black Friday Sale Limited-time deals: save up to 50% on select hotels [Book now](https://expedia.ca/deals?rfrr=FTG_BF_PROMO_) ## Frequently asked questions ### How much is a United Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Kona Intl. Airport (KOA)? > Apply the "Price (lowest to highest)" filter on Expedia to find cheap United Airlines return flights from STL to KOA. Affordable one-way tickets are available as well.\**\*These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.* ### What is the cheapest month to fly from STL to KOA with United Airlines? > October is one of the cheapest months to get away to Kailua-Kona with United Airlines. You could also find great deals on one-way and round-trip tickets in September. ### Does United Airlines fly nonstop from Lambert-St. Louis Intl. Airport (STL) to Kona Intl. Airport (KOA)? > Enter your dates, press search and check the "Nonstop" filter on Expedia to browse any direct flights from STL to KOA with United Airlines or other airlines. ### What airports does United Airlines fly into in Kailua-Kona? > Take a United Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Kailua-Kona, and you'll probably land at Kona Intl. Airport (KOA). This is the airline's primary hub here. ### Can I change or cancel my United Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Kona Intl. Airport (KOA)? > Depending on your ticket type, a fee is typically charged if you modify or cancel your flight more than 24 hours after it's confirmed. To find flexible fares, select our "Changes included" and "No cancel fee" boxes when you search for flights. For more information on cancelling or modifying your reservation, go to "[Trips](https://www.expedia.ca/trips)," select your flight and click on "Manage Booking." ## Explore a world of travel with Expedia - Lodging - Flights - Packages - Cars - Vacation Rental - Other ### Lodging - [Kailua-Kona Hotels](https://www.expedia.ca/Kailua-Kona-Hotels.d1879.Travel-Guide-Hotels) - [Aparthotels in Kalaoa](https://www.expedia.ca/Kalaoa-Apart-Hotels.d3000186518-aaApartHotels.Travel-Guide-Accommodation) - [Guest Houses in Kalaoa](https://www.expedia.ca/Kalaoa-Guest-Houses.d3000186518-aaGuestHouses.Travel-Guide-Accommodation) - [Cheap Hotels in Kalaoa](https://www.expedia.ca/Kalaoa-Hotels-Cheap-Hotels.0-0-d3000186518-tCheapHotels.Travel-Guide-Filter-Hotels) - [Luxury Hotels in Kalaoa](https://www.expedia.ca/Kalaoa-Hotels-Luxury-Hotel.0-0-d3000186518-tLuxuryHotel.Travel-Guide-Filter-Hotels) - [Kalaoa Hotels](https://www.expedia.ca/Kalaoa-Hotels.d3000186518.Travel-Guide-Hotels) - [Inns in Kalaoa](https://www.expedia.ca/Kalaoa-Inns.d3000186518-aaInns.Travel-Guide-Accommodation) - 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[Kohanaiki Beach Park](https://www.expedia.ca/Kohanaiki-Beach-Park-Kailua-Kona.d553248635977261088.Vacation-Attraction) - [Mahai'ula Beach](https://www.expedia.ca/Mahaiula-Beach-Kailua-Kona.d553248621555565565.Vacation-Attraction) - [Ooma Beach](https://www.expedia.ca/Ooma-Beach-Kailua-Kona.d553248635983994078.Vacation-Attraction) - [All inclusive Vacation Packages Hawaii](https://www.expedia.ca/lp/theme-vacations/all-inclusive-vacations/213/Hawaii) ### Cars - [Avis Rental Cars in Kalaoa](https://www.expedia.ca/Avis-Car-Rentals-In-Kalaoa.d3000186518-c41.Car-Rental-Guide-Suppliers) - [Enterprise Rental Cars in Kalaoa](https://www.expedia.ca/Enterprise-Car-Rentals-In-Kalaoa.d3000186518-c15.Car-Rental-Guide-Suppliers) ### Vacation Rental - [Kalaoa Vacation Rentals](https://www.expedia.ca/Kalaoa-Vacation-Rentals.d3000186518.Travel-Guide-VacationRentals) ### Other - [Things to do in Kalaoa](https://www.expedia.ca/Things-To-Do-In-Kalaoa.d3000186518.Travel-Guide-Activities) \*Available to Expedia members.