Cheap Flights to Washington County from ₩219,300

View ₩219,300 flight on Sat, Sep 5, 2026Opens in a new window

Popular airlines to Washington County

  • American Airlines

  • Delta

  • United

  • Alaska Airlines

  • Southwest Airlines

  • Frontier Airlines

  • Air Canada

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How much is the cheapest flight to Washington County?

Prices were available within the past 7 days and start at ₩219,300 for one-way flights and ₩465,600 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sun, Aug 2 - Tue, Aug 11
DFW
Dallas
STL
St. Louis
₩465,600 Roundtrip, found 9 hours ago
₩465,600
Roundtrip
found 9 hours ago
Select American Airlines flight, departing Sun, Aug 2 from Dallas to St. Louis, returning Tue, Aug 11, priced at ₩465,600 found 9 hours ago
Delta
Wed, Jul 29 - Mon, Aug 3
IAD
Washington
STL
St. Louis
₩470,100 Roundtrip, found 19 hours ago
₩470,100
Roundtrip
found 19 hours ago
Select Delta flight, departing Wed, Jul 29 from Washington to St. Louis, returning Mon, Aug 3, priced at ₩470,100 found 19 hours ago
Delta
Wed, Jul 29 - Mon, Aug 3
IAD
Washington
STL
St. Louis
₩470,200 Roundtrip, found 19 hours ago
₩470,200
Roundtrip
found 19 hours ago
Select Delta flight, departing Wed, Jul 29 from Washington to St. Louis, returning Mon, Aug 3, priced at ₩470,200 found 19 hours ago
American Airlines
Sun, Aug 2 - Tue, Aug 11
DFW
Dallas
STL
St. Louis
₩480,600 Roundtrip, found 9 hours ago
₩480,600
Roundtrip
found 9 hours ago
Select American Airlines flight, departing Sun, Aug 2 from Dallas to St. Louis, returning Tue, Aug 11, priced at ₩480,600 found 9 hours ago
American Airlines
Sun, Aug 2 - Tue, Aug 11
DFW
Dallas
STL
St. Louis
₩511,600 Roundtrip, found 9 hours ago
₩511,600
Roundtrip
found 9 hours ago
Select American Airlines flight, departing Sun, Aug 2 from Dallas to St. Louis, returning Tue, Aug 11, priced at ₩511,600 found 9 hours ago
American Airlines
Thu, Jul 23 - Thu, Jul 30
DFW
Dallas
STL
St. Louis
₩520,700 Roundtrip, found 9 hours ago
₩520,700
Roundtrip
found 9 hours ago
Select American Airlines flight, departing Thu, Jul 23 from Dallas to St. Louis, returning Thu, Jul 30, priced at ₩520,700 found 9 hours ago
American Airlines
Sun, Aug 2 - Tue, Aug 11
DFW
Dallas
STL
St. Louis
₩523,700 Roundtrip, found 9 hours ago
₩523,700
Roundtrip
found 9 hours ago
Select American Airlines flight, departing Sun, Aug 2 from Dallas to St. Louis, returning Tue, Aug 11, priced at ₩523,700 found 9 hours ago
United
Sat, Jul 25 - Mon, Jul 27
IAD
Washington
STL
St. Louis
₩537,900 Roundtrip, found 19 hours ago
₩537,900
Roundtrip
found 19 hours ago
Select United flight, departing Sat, Jul 25 from Washington to St. Louis, returning Mon, Jul 27, priced at ₩537,900 found 19 hours ago
Air Canada
Thu, Nov 26 - Sun, Dec 6
ICN
Seoul
STL
St. Louis
₩2,248,200 Roundtrip, found 4 days ago
₩2,248,200
Roundtrip
found 4 days ago
Select Air Canada flight, departing Thu, Nov 26 from Seoul to St. Louis, returning Sun, Dec 6, priced at ₩2,248,200 found 4 days ago
Lufthansa
Wed, Dec 16 - Fri, Jan 1
ICN
Seoul
STL
St. Louis
₩2,350,200 Roundtrip, found 4 days ago
₩2,350,200
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Wed, Dec 16 from Seoul to St. Louis, returning Fri, Jan 1, priced at ₩2,350,200 found 4 days ago
Book with confidence

About Washington County

Expedia offers flights to Washington County to meet every traveler'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.

Trending flights to Washington County

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Fri, Sep 4 - Wed, Sep 16
ICN
Seoul
STL
St. Louis
₩1,964,700 Roundtrip, just found
₩1,964,700
Roundtrip
just found
Select American Airlines flight, departing Fri, Sep 4 from Seoul to St. Louis, returning Wed, Sep 16, priced at ₩1,964,700 just found

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. ₩465,600 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 ₩465,600 and ₩2,350,200 in the last seven days. For one-way trips departing from Washington (IAD), the lowest amount paid during this time was ₩219,300.
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 ₩465,600 to ₩2,350,200 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 65ºF to 85ºF across this season, so organize 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

About Washington County

Expedia offers flights to Washington County to meet every traveler'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.
About Washington County
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