Cheap Flights to Washington County | Popular Routes to Washington County from HK$2,383

View HK$2,383 flight on Sat, 28 Feb 2026Opens in a new window

Popular airlines to Washington County

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  • 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 HK$2,383 for one-way flights and HK$3,701 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Mon, 2 Mar - Tue, 3 Mar
DTW
Detroit
STL
St. Louis
HK$3,701 Return, found 1 day ago
HK$3,701
Return
found 1 day ago
Select American Airlines flight, departing Mon, 2 Mar from Detroit to St. Louis, returning Tue, 3 Mar, priced at HK$3,701 found 1 day ago
United
Sun, 1 Mar - Fri, 6 Mar
DTW
Detroit
STL
St. Louis
HK$3,754 Return, found 1 day ago
HK$3,754
Return
found 1 day ago
Select United flight, departing Sun, 1 Mar from Detroit to St. Louis, returning Fri, 6 Mar, priced at HK$3,754 found 1 day ago
American Airlines
Sat, 28 Feb - Tue, 3 Mar
DTW
Detroit
STL
St. Louis
HK$4,238 Return, found 1 day ago
HK$4,238
Return
found 1 day ago
Select American Airlines flight, departing Sat, 28 Feb from Detroit to St. Louis, returning Tue, 3 Mar, priced at HK$4,238 found 1 day ago
United
Sat, 28 Feb - Tue, 3 Mar
DTW
Detroit
STL
St. Louis
HK$4,239 Return, found 1 day ago
HK$4,239
Return
found 1 day ago
Select United flight, departing Sat, 28 Feb from Detroit to St. Louis, returning Tue, 3 Mar, priced at HK$4,239 found 1 day ago
Delta
Sat, 28 Feb - Tue, 3 Mar
DTW
Detroit
STL
St. Louis
HK$4,749 Return, found 1 day ago
HK$4,749
Return
found 1 day ago
Select Delta flight, departing Sat, 28 Feb from Detroit to St. Louis, returning Tue, 3 Mar, priced at HK$4,749 found 1 day ago
United
Sat, 2 May - Sat, 27 Jun
MUC
Munich
STL
St. Louis
HK$5,627 Return, found 1 day ago
HK$5,627
Return
found 1 day ago
Select United flight, departing Sat, 2 May from Munich to St. Louis, returning Sat, 27 Jun, priced at HK$5,627 found 1 day ago
China Airlines
Tue, 6 Oct - Sat, 31 Oct
HKG
Hong Kong SAR
STL
St. Louis
HK$6,726 Return, found 15 hours ago
HK$6,726
Return
found 15 hours ago
Select China Airlines flight, departing Tue, 6 Oct from Hong Kong SAR to St. Louis, returning Sat, 31 Oct, priced at HK$6,726 found 15 hours ago
Scandinavian Airlines
Sat, 2 May - Sat, 27 Jun
MUC
Munich
STL
St. Louis
HK$7,302 Return, found 1 day ago
HK$7,302
Return
found 1 day ago
Select Scandinavian Airlines flight, departing Sat, 2 May from Munich to St. Louis, returning Sat, 27 Jun, priced at HK$7,302 found 1 day ago
Air Canada
Sat, 2 May - Sat, 27 Jun
MUC
Munich
STL
St. Louis
HK$7,447 Return, found 1 day ago
HK$7,447
Return
found 1 day ago
Select Air Canada flight, departing Sat, 2 May from Munich to St. Louis, returning Sat, 27 Jun, priced at HK$7,447 found 1 day ago
Air France
Sat, 2 May - Sat, 27 Jun
MUC
Munich
STL
St. Louis
HK$8,043 Return, found 1 day ago
HK$8,043
Return
found 1 day ago
Select Air France flight, departing Sat, 2 May from Munich to St. Louis, returning Sat, 27 Jun, priced at HK$8,043 found 1 day ago

About Washington County

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.

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. HK$3,701 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 HK$3,701 and HK$8,043 in the last seven days. For one-way trips departing from Detroit (DTW), the lowest amount paid during this time was HK$2,383.
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 HK$3,701 to HK$8,043 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.

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.

China Airlines
Tue, 6 Oct - Sat, 31 Oct
HKG
Hong Kong SAR
STL
St. Louis
HK$6,726 Return, found 15 hours ago
HK$6,726
Return
found 15 hours ago
Select China Airlines flight, departing Tue, 6 Oct from Hong Kong SAR to St. Louis, returning Sat, 31 Oct, priced at HK$6,726 found 15 hours ago
*Available to Expedia members.