Flight Destinations in Washington County

View ฿6,180 flight on Mon, 20 Apr 2026Opens in a new window

Popular airlines to Washington County

  • American Airlines

  • Delta

  • United

  • Southwest Airlines

  • Frontier Airlines

  • Alaska Airlines

  • Air Canada

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Cheap round-trip flights to Washington County

Prices were available within the past 7 days and start at ฿6,180 for one-way flights and ฿13,470 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, 14 Mar - Tue, 24 Mar
BOS
Boston
STL
St. Louis
฿13,470 Return, found 1 day ago
฿13,470
Return
found 1 day ago
Select Delta flight, departing Sat, 14 Mar from Boston to St. Louis, returning Tue, 24 Mar, priced at ฿13,470 found 1 day ago
American Airlines
Sat, 14 Mar - Tue, 24 Mar
BOS
Boston
STL
St. Louis
฿15,365 Return, found 1 day ago
฿15,365
Return
found 1 day ago
Select American Airlines flight, departing Sat, 14 Mar from Boston to St. Louis, returning Tue, 24 Mar, priced at ฿15,365 found 1 day ago
United
Fri, 13 Mar - Tue, 24 Mar
BOS
Boston
STL
St. Louis
฿15,615 Return, found 1 day ago
฿15,615
Return
found 1 day ago
Select United flight, departing Fri, 13 Mar from Boston to St. Louis, returning Tue, 24 Mar, priced at ฿15,615 found 1 day ago
Delta
Thu, 26 Nov - Tue, 15 Dec
LHR
London
STL
St. Louis
฿22,435 Return, found 1 day ago
฿22,435
Return
found 1 day ago
Select Delta flight, departing Thu, 26 Nov from London to St. Louis, returning Tue, 15 Dec, priced at ฿22,435 found 1 day ago
Iberia
Thu, 26 Nov - Tue, 15 Dec
LHR
London
STL
St. Louis
฿23,970 Return, found 1 day ago
฿23,970
Return
found 1 day ago
Select Iberia flight, departing Thu, 26 Nov from London to St. Louis, returning Tue, 15 Dec, priced at ฿23,970 found 1 day ago
British Airways
Thu, 26 Nov - Tue, 15 Dec
LHR
London
STL
St. Louis
฿25,390 Return, found 1 day ago
฿25,390
Return
found 1 day ago
Select British Airways flight, departing Thu, 26 Nov from London to St. Louis, returning Tue, 15 Dec, priced at ฿25,390 found 1 day ago
Air France
Thu, 26 Nov - Tue, 15 Dec
LHR
London
STL
St. Louis
฿27,820 Return, found 1 day ago
฿27,820
Return
found 1 day ago
Select Air France flight, departing Thu, 26 Nov from London to St. Louis, returning Tue, 15 Dec, priced at ฿27,820 found 1 day ago
Philippine Airlines
Tue, 5 May - Fri, 11 Sept
BKK
Bangkok
STL
St. Louis
฿28,560 Return, found 1 day ago
฿28,560
Return
found 1 day ago
Select Philippine Airlines flight, departing Tue, 5 May from Bangkok to St. Louis, returning Fri, 11 Sept, priced at ฿28,560 found 1 day ago
Finnair
Thu, 26 Nov - Tue, 15 Dec
LHR
London
STL
St. Louis
฿28,730 Return, found 1 day ago
฿28,730
Return
found 1 day ago
Select Finnair flight, departing Thu, 26 Nov from London to St. Louis, returning Tue, 15 Dec, priced at ฿28,730 found 1 day ago
KLM
Thu, 26 Nov - Tue, 15 Dec
LHR
London
STL
St. Louis
฿29,090 Return, found 1 day ago
฿29,090
Return
found 1 day ago
Select KLM flight, departing Thu, 26 Nov from London to St. Louis, returning Tue, 15 Dec, priced at ฿29,090 found 1 day ago

About Washington County

Expedia offers flights to Washington County to meet every traveller's needs. Whatever your flight need - Expedia has the flight for you. So choose from flights to Washington County or destinations around the world and discover how easy it is to make your flight reservations on Expedia.

Frequently asked questions

How do I find cheap flights to Washington County that have flexible change policies?
At Expedia, we've been channeling our inner yogi to provide you with the most flexible airfares on the market. Just check the "No change fee" box right under the filter heading "Flexible change policies" to find your dream flight to Washington County.
Which airlines fly to Washington County?
With a great range of airlines operating flights into or near Washington County, you're not short on choice:

  • Southwest Airlines - 2,214 flights to or near Washington County each month, including 2,214 flights to Lambert-St. Louis Intl. Airport (STL) per month.
  • American Airlines - 789 flights to or near Washington County each month, including 789 flights to Lambert-St. Louis Intl. Airport (STL) per month.
  • Delta Air Lines - 650 flights to or near Washington County each month, including 650 flights to Lambert-St. Louis Intl. Airport (STL) per month.

How can I find cheap tickets to Washington County?
You'll always nab an amazing deal with Expedia, but our "flexible dates" feature makes it that much easier. Enter your preferred travel date, then click on the flexible dates box above to compare prices for nearby days. ฿13,470 was the best price for a flight to Washington County in the last seven days.
How much is a flight to Washington County?
You could have scored a return ticket to Washington County from anywhere between ฿13,470 and ฿29,640 in the last seven days. For one-way trips departing from Boston (BOS), the lowest amount paid during this time was ฿6,180.
What are the most popular airports to fly into in Washington County?
Book your flight to Lambert-St. Louis Intl. Airport (STL) and sample the best that Washington County has to offer. As the region's primary entry point, approximately 4,902 flights touch down here every month.
How much is a plane ticket to Washington County?
Fares to Washington County varied from ฿13,470 to ฿29,640 in the last seven days. Generally, the sooner you make a reservation, the better the deal.
What is the best time to go to Washington County?
July, August and September are the most popular months to venture to Sullivan, one of Washington County's most interesting cities. Summertime here starts June 20. Average temperatures vary from 18ºC to 29ºC across this season, so organise your travels around then if you're into warmer weather.
What months are the cheapest to book a flight to Washington County?
February is the ideal month to bag an awesome deal to Washington County. Keep in mind that the most expensive time to make a booking in the States isn't during the height of summer, but the month of December.

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.

Philippine Airlines
Tue, 5 May - Fri, 11 Sept
BKK
Bangkok
STL
St. Louis
฿28,560 Return, found 1 day ago
฿28,560
Return
found 1 day ago
Select Philippine Airlines flight, departing Tue, 5 May from Bangkok to St. Louis, returning Fri, 11 Sept, priced at ฿28,560 found 1 day ago
*Available to Expedia members.