Flight Destinations in Washington County

View ฿5,905 flight on Mon, 23 Mar 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 ฿5,905 for one-way flights and ฿11,805 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Mon, 23 Mar - Fri, 27 Mar
DEN
Denver
STL
St. Louis
฿11,805 Return, found 1 day ago
฿11,805
Return
found 1 day ago
Select Delta flight, departing Mon, 23 Mar from Denver to St. Louis, returning Fri, 27 Mar, priced at ฿11,805 found 1 day ago
United
Mon, 23 Mar - Fri, 27 Mar
DEN
Denver
STL
St. Louis
฿13,990 Return, found 1 day ago
฿13,990
Return
found 1 day ago
Select United flight, departing Mon, 23 Mar from Denver to St. Louis, returning Fri, 27 Mar, priced at ฿13,990 found 1 day ago
Delta
Mon, 27 Jul - Mon, 3 Aug
LAX
Los Angeles
STL
St. Louis
฿14,745 Return, found 4 days ago
฿14,745
Return
found 4 days ago
Select Delta flight, departing Mon, 27 Jul from Los Angeles to St. Louis, returning Mon, 3 Aug, priced at ฿14,745 found 4 days ago
American Airlines
Mon, 23 Mar - Fri, 27 Mar
DEN
Denver
STL
St. Louis
฿16,025 Return, found 1 day ago
฿16,025
Return
found 1 day ago
Select American Airlines flight, departing Mon, 23 Mar from Denver to St. Louis, returning Fri, 27 Mar, priced at ฿16,025 found 1 day ago
United
Sat, 21 Mar - Sun, 22 Mar
IAD
Washington
STL
St. Louis
฿17,490 Return, found 1 day ago
฿17,490
Return
found 1 day ago
Select United flight, departing Sat, 21 Mar from Washington to St. Louis, returning Sun, 22 Mar, priced at ฿17,490 found 1 day ago
Philippine Airlines
Wed, 30 Sept - Wed, 14 Oct
BKK
Bangkok
STL
St. Louis
฿28,385 Return, found 4 days ago
฿28,385
Return
found 4 days ago
Select Philippine Airlines flight, departing Wed, 30 Sept from Bangkok to St. Louis, returning Wed, 14 Oct, priced at ฿28,385 found 4 days ago
Air Canada
Tue, 12 May - Wed, 26 Aug
BKK
Bangkok
STL
St. Louis
฿33,560 Return, found 2 days ago
฿33,560
Return
found 2 days ago
Select Air Canada flight, departing Tue, 12 May from Bangkok to St. Louis, returning Wed, 26 Aug, priced at ฿33,560 found 2 days ago
Cathay Pacific
Wed, 14 Oct - Sun, 1 Nov
BKK
Bangkok
STL
St. Louis
฿36,770 Return, found 4 days ago
฿36,770
Return
found 4 days ago
Select Cathay Pacific flight, departing Wed, 14 Oct from Bangkok to St. Louis, returning Sun, 1 Nov, priced at ฿36,770 found 4 days ago
Qatar Airways
Thu, 26 Mar - Mon, 13 Apr
BKK
Bangkok
STL
St. Louis
฿42,630 Return, found 13 hours ago
฿42,630
Return
found 13 hours ago
Select Qatar Airways flight, departing Thu, 26 Mar from Bangkok to St. Louis, returning Mon, 13 Apr, priced at ฿42,630 found 13 hours ago
Austrian Airlines
Thu, 22 Oct - Sat, 7 Nov
BKK
Bangkok
STL
St. Louis
฿42,865 Return, found 4 days ago
฿42,865
Return
found 4 days ago
Select Austrian Airlines flight, departing Thu, 22 Oct from Bangkok to St. Louis, returning Sat, 7 Nov, priced at ฿42,865 found 4 days ago

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
Wed, 30 Sept - Wed, 14 Oct
BKK
Bangkok
STL
St. Louis
฿28,385 Return, found 4 days ago
฿28,385
Return
found 4 days ago
Select Philippine Airlines flight, departing Wed, 30 Sept from Bangkok to St. Louis, returning Wed, 14 Oct, priced at ฿28,385 found 4 days ago

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. ฿11,805 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 ฿11,805 and ฿42,865 in the last seven days. For one-way trips departing from Denver (DEN), the lowest amount paid during this time was ฿5,905.
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 ฿11,805 to ฿42,865 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.

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About Washington County

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About Washington County

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