Washington County Flights - Book Cheap Flights to Washington County

View RM595 flight on Sat, 2 May 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 RM595 for one-way flights and RM1,188 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, 2 May - Sat, 9 May
SAN
San Diego
STL
St. Louis
RM1,188 Return, found 1 day ago
RM1,188
Return
found 1 day ago
Select Delta flight, departing Sat, 2 May from San Diego to St. Louis, returning Sat, 9 May, priced at RM1,188 found 1 day ago
Delta
Fri, 7 Aug - Sun, 9 Aug
DFW
Dallas
STL
St. Louis
RM1,299 Return, found 1 day ago
RM1,299
Return
found 1 day ago
Select Delta flight, departing Fri, 7 Aug from Dallas to St. Louis, returning Sun, 9 Aug, priced at RM1,299 found 1 day ago
American Airlines
Sat, 2 May - Sat, 9 May
SAN
San Diego
STL
St. Louis
RM1,368 Return, found 1 day ago
RM1,368
Return
found 1 day ago
Select American Airlines flight, departing Sat, 2 May from San Diego to St. Louis, returning Sat, 9 May, priced at RM1,368 found 1 day ago
Delta
Sat, 2 May - Sat, 9 May
SAN
San Diego
STL
St. Louis
RM1,371 Return, found 1 day ago
RM1,371
Return
found 1 day ago
Select Delta flight, departing Sat, 2 May from San Diego to St. Louis, returning Sat, 9 May, priced at RM1,371 found 1 day ago
Delta
Fri, 7 Aug - Sun, 9 Aug
DAL
Dallas
STL
St. Louis
RM1,379 Return, found 1 day ago
RM1,379
Return
found 1 day ago
Select Delta flight, departing Fri, 7 Aug from Dallas to St. Louis, returning Sun, 9 Aug, priced at RM1,379 found 1 day ago
United
Sat, 2 May - Sat, 9 May
SAN
San Diego
STL
St. Louis
RM1,389 Return, found 1 day ago
RM1,389
Return
found 1 day ago
Select United flight, departing Sat, 2 May from San Diego to St. Louis, returning Sat, 9 May, priced at RM1,389 found 1 day ago
Delta
Fri, 7 Aug - Sun, 9 Aug
DFW
Dallas
STL
St. Louis
RM1,435 Return, found 1 day ago
RM1,435
Return
found 1 day ago
Select Delta flight, departing Fri, 7 Aug from Dallas to St. Louis, returning Sun, 9 Aug, priced at RM1,435 found 1 day ago
Delta
Sat, 2 May - Sat, 9 May
SAN
San Diego
STL
St. Louis
RM1,452 Return, found 1 day ago
RM1,452
Return
found 1 day ago
Select Delta flight, departing Sat, 2 May from San Diego to St. Louis, returning Sat, 9 May, priced at RM1,452 found 1 day ago
United
Fri, 7 Aug - Sun, 9 Aug
DFW
Dallas
STL
St. Louis
RM1,459 Return, found 1 day ago
RM1,459
Return
found 1 day ago
Select United flight, departing Fri, 7 Aug from Dallas to St. Louis, returning Sun, 9 Aug, priced at RM1,459 found 1 day ago
Delta
Fri, 7 Aug - Sun, 9 Aug
DFW
Dallas
STL
St. Louis
RM1,460 Return, found 1 day ago
RM1,460
Return
found 1 day ago
Select Delta flight, departing Fri, 7 Aug from Dallas to St. Louis, returning Sun, 9 Aug, priced at RM1,460 found 1 day 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. RM1,188 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 RM1,188 and RM1,460 in the last seven days. For one-way trips departing from San Diego (SAN), the lowest amount paid during this time was RM595.
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 RM1,188 to RM1,460 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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