A wooden bridge with a dog walking on it.

Flight to Washington County

View S$161 flight on Wed, 28 Oct, 2026Opens in a new window

Popular airlines to Washington County

  • American Airlines

  • Delta

  • United

  • Southwest Airlines

  • Alaska Airlines

  • Frontier Airlines

  • Air Canada

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 40% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap round-trip flights to Washington County

Prices were available within the past 7 days and start at S$161 for one-way flights and S$322 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, 28 Oct - Mon, 2 Nov
AUS
Austin
STL
St. Louis
S$322 Return, found 22 hours ago
S$322
Return
found 22 hours ago
Select Delta flight, departing Wed, 28 Oct from Austin to St. Louis, returning Mon, 2 Nov, priced at S$322 found 22 hours ago
Delta
Wed, 28 Oct - Mon, 2 Nov
AUS
Austin
STL
St. Louis
S$348 Return, found 22 hours ago
S$348
Return
found 22 hours ago
Select Delta flight, departing Wed, 28 Oct from Austin to St. Louis, returning Mon, 2 Nov, priced at S$348 found 22 hours ago
United
Wed, 28 Oct - Mon, 2 Nov
AUS
Austin
STL
St. Louis
S$399 Return, found 22 hours ago
S$399
Return
found 22 hours ago
Select United flight, departing Wed, 28 Oct from Austin to St. Louis, returning Mon, 2 Nov, priced at S$399 found 22 hours ago
American Airlines
Wed, 28 Oct - Mon, 2 Nov
AUS
Austin
STL
St. Louis
S$451 Return, found 22 hours ago
S$451
Return
found 22 hours ago
Select American Airlines flight, departing Wed, 28 Oct from Austin to St. Louis, returning Mon, 2 Nov, priced at S$451 found 22 hours ago
United
Sat, 22 Aug - Fri, 28 Aug
MEM
Memphis
STL
St. Louis
S$541 Return, found 1 day ago
S$541
Return
found 1 day ago
Select United flight, departing Sat, 22 Aug from Memphis to St. Louis, returning Fri, 28 Aug, priced at S$541 found 1 day ago
Qatar Airways
Wed, 7 Oct - Tue, 17 Nov
SIN
Singapore
STL
St. Louis
S$1,529 Return, found 1 hour ago
S$1,529
Return
found 1 hour ago
Select Qatar Airways flight, departing Wed, 7 Oct from Singapore to St. Louis, returning Tue, 17 Nov, priced at S$1,529 found 1 hour ago
Cathay Pacific
Thu, 17 Sept - Sat, 17 Oct
DPS
Bali
STL
St. Louis
S$1,635 Return, found 1 day ago
S$1,635
Return
found 1 day ago
Select Cathay Pacific flight, departing Thu, 17 Sept from Bali to St. Louis, returning Sat, 17 Oct, priced at S$1,635 found 1 day ago
Cathay Pacific
Thu, 17 Sept - Sat, 17 Oct
DPS
Bali
STL
St. Louis
S$1,676 Return, found 1 day ago
S$1,676
Return
found 1 day ago
Select Cathay Pacific flight, departing Thu, 17 Sept from Bali to St. Louis, returning Sat, 17 Oct, priced at S$1,676 found 1 day ago
Cathay Pacific
Mon, 21 Sept - Wed, 30 Sept
SIN
Singapore
COU
Columbia
S$1,697 Return, found 2 days ago
S$1,697
Return
found 2 days ago
Select Cathay Pacific flight, departing Mon, 21 Sept from Singapore to Columbia, returning Wed, 30 Sept, priced at S$1,697 found 2 days ago
Japan Airlines
Wed, 7 Oct - Tue, 17 Nov
SIN
Singapore
STL
St. Louis
S$1,705 Return, found 1 hour ago
S$1,705
Return
found 1 hour ago
Select Japan Airlines flight, departing Wed, 7 Oct from Singapore to St. Louis, returning Tue, 17 Nov, priced at S$1,705 found 1 hour 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.

Qatar Airways
Wed, 7 Oct - Tue, 17 Nov
SIN
Singapore
STL
St. Louis
S$1,529 Return, found 1 hour ago
S$1,529
Return
found 1 hour ago
Select Qatar Airways flight, departing Wed, 7 Oct from Singapore to St. Louis, returning Tue, 17 Nov, priced at S$1,529 found 1 hour 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. S$322 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 S$322 and S$1,705 in the last seven days. For one-way trips departing from Austin (AUS), the lowest amount paid during this time was S$161.
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.
When is the cheapest time to fly to Washington County?
Fly out on a Tuesday to raise your chances of landing the cheapest flight to Washington County. Mondays are usually the next most affordable day to depart. Saturday is typically the costliest day to fly anywhere.
How much is a plane ticket to Washington County?
Fares to Washington County varied from S$322 to S$1,705 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.

Book with confidence

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.

Travel information

Washington County Flights Information

Airlines serving
Delta, United, American Airlines, Qatar Airways, Cathay Pacific, Air Canada, Japan Airlines
Roundtrip price
from S$322
Washington County Flights Information
*Available to Expedia members.