Cheap Flights to Washington County from ￥70,700

View ￥70,700 flight on Wed, May 13, 2026Opens in a new window

Popular airlines to Washington County

  • American Airlines

  • Delta

  • United

  • Southwest Airlines

  • Frontier Airlines

  • Alaska 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

How much is the cheapest flight to Washington County?

Prices were available within the past 7 days and start at ￥70,700 for one-way flights and ￥108,300 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Mon, May 11 - Mon, Sep 14
HND
Tokyo
STL
St. Louis
￥108,300 Roundtrip, found 2 days ago
￥108,300
Roundtrip
found 2 days ago
Select American Airlines flight, departing Mon, May 11 from Tokyo to St. Louis, returning Mon, Sep 14, priced at ￥108,300 found 2 days ago
American Airlines
Wed, Aug 5 - Wed, Aug 12
NRT
Tokyo
STL
St. Louis
￥108,510 Roundtrip, found 2 days ago
￥108,510
Roundtrip
found 2 days ago
Select American Airlines flight, departing Wed, Aug 5 from Tokyo to St. Louis, returning Wed, Aug 12, priced at ￥108,510 found 2 days ago
Delta
Wed, May 13 - Fri, Jul 31
HND
Tokyo
STL
St. Louis
￥120,680 Roundtrip, found 5 days ago
￥120,680
Roundtrip
found 5 days ago
Select Delta flight, departing Wed, May 13 from Tokyo to St. Louis, returning Fri, Jul 31, priced at ￥120,680 found 5 days ago
United
Mon, Aug 24 - Sun, Aug 30
HND
Tokyo
STL
St. Louis
￥121,500 Roundtrip, found 2 days ago
￥121,500
Roundtrip
found 2 days ago
Select United flight, departing Mon, Aug 24 from Tokyo to St. Louis, returning Sun, Aug 30, priced at ￥121,500 found 2 days ago
American Airlines
Wed, Aug 19 - Wed, Aug 26
HND
Tokyo
COU
Columbia
￥123,400 Roundtrip, found 3 days ago
￥123,400
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Aug 19 from Tokyo to Columbia, returning Wed, Aug 26, priced at ￥123,400 found 3 days ago
American Airlines
Tue, Sep 1 - Mon, Sep 7
NRT
Tokyo
COU
Columbia
￥123,610 Roundtrip, found 2 days ago
￥123,610
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Sep 1 from Tokyo to Columbia, returning Mon, Sep 7, priced at ￥123,610 found 2 days ago
Air Canada
Tue, Jul 14 - Tue, Jul 28
NRT
Tokyo
STL
St. Louis
￥167,880 Roundtrip, found 2 days ago
￥167,880
Roundtrip
found 2 days ago
Select Air Canada flight, departing Tue, Jul 14 from Tokyo to St. Louis, returning Tue, Jul 28, priced at ￥167,880 found 2 days ago
Alaska Airlines
Mon, Aug 24 - Sun, Sep 6
NRT
Tokyo
STL
St. Louis
￥172,160 Roundtrip, found 3 days ago
￥172,160
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Mon, Aug 24 from Tokyo to St. Louis, returning Sun, Sep 6, priced at ￥172,160 found 3 days ago
Cathay Pacific
Thu, Sep 17 - Fri, Sep 25
NRT
Tokyo
STL
St. Louis
￥201,620 Roundtrip, found 1 day ago
￥201,620
Roundtrip
found 1 day ago
Select Cathay Pacific flight, departing Thu, Sep 17 from Tokyo to St. Louis, returning Fri, Sep 25, priced at ￥201,620 found 1 day ago
Alaska Airlines
Sat, Aug 29 - Fri, Sep 4
NGO
Nagoya
STL
St. Louis
￥207,090 Roundtrip, found 6 days ago
￥207,090
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Sat, Aug 29 from Nagoya to St. Louis, returning Fri, Sep 4, priced at ￥207,090 found 6 days ago

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
Mon, May 11 - Mon, Sep 14
HND
Tokyo
STL
St. Louis
￥108,300 Roundtrip, found 2 days ago
￥108,300
Roundtrip
found 2 days ago
Select American Airlines flight, departing Mon, May 11 from Tokyo to St. Louis, returning Mon, Sep 14, priced at ￥108,300 found 2 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. ￥108,300 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 ￥108,300 and ￥207,090 in the last seven days. For one-way trips departing from Tokyo (HND), the lowest amount paid during this time was ￥70,700.
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 ￥108,300 to ￥207,090 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.

Explore a world of travel with Expedia

*Available to Expedia members.