A mountain peak surrounded by dense forest and distant hills under a partly cloudy sky.

Cheap Flights to Washington County | Popular Routes to Washington County from HK$2,028

View HK$2,028 flight on Mon, 3 Aug 2026Opens in a new window

Popular airlines to Washington County

  • American Airlines

  • Delta

  • KLM

  • Air France

  • United

  • Virgin Atlantic

  • Breeze Airways

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 35% 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 HK$2,028 for one-way flights and HK$2,271 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Mon, 3 Aug - Mon, 10 Aug
IAD
Washington
TRI
Tri-Cities
HK$2,271 Return, found 23 hours ago
HK$2,271
Return
found 23 hours ago
Select Delta flight, departing Mon, 3 Aug from Washington to Tri-Cities, returning Mon, 10 Aug, priced at HK$2,271 found 23 hours ago
Delta
Mon, 3 Aug - Mon, 10 Aug
IAD
Washington
TRI
Tri-Cities
HK$2,389 Return, found 23 hours ago
HK$2,389
Return
found 23 hours ago
Select Delta flight, departing Mon, 3 Aug from Washington to Tri-Cities, returning Mon, 10 Aug, priced at HK$2,389 found 23 hours ago
Delta
Fri, 21 Aug - Fri, 28 Aug
IAD
Washington
TRI
Tri-Cities
HK$2,583 Return, found 3 days ago
HK$2,583
Return
found 3 days ago
Select Delta flight, departing Fri, 21 Aug from Washington to Tri-Cities, returning Fri, 28 Aug, priced at HK$2,583 found 3 days ago
Delta
Mon, 3 Aug - Mon, 10 Aug
IAD
Washington
TRI
Tri-Cities
HK$2,626 Return, found 23 hours ago
HK$2,626
Return
found 23 hours ago
Select Delta flight, departing Mon, 3 Aug from Washington to Tri-Cities, returning Mon, 10 Aug, priced at HK$2,626 found 23 hours ago
Delta
Fri, 21 Aug - Fri, 28 Aug
IAD
Washington
TRI
Tri-Cities
HK$2,701 Return, found 3 days ago
HK$2,701
Return
found 3 days ago
Select Delta flight, departing Fri, 21 Aug from Washington to Tri-Cities, returning Fri, 28 Aug, priced at HK$2,701 found 3 days ago
Delta
Mon, 3 Aug - Mon, 10 Aug
IAD
Washington
TRI
Tri-Cities
HK$2,744 Return, found 23 hours ago
HK$2,744
Return
found 23 hours ago
Select Delta flight, departing Mon, 3 Aug from Washington to Tri-Cities, returning Mon, 10 Aug, priced at HK$2,744 found 23 hours ago
American Airlines
Mon, 3 Aug - Mon, 10 Aug
IAD
Washington
TRI
Tri-Cities
HK$2,819 Return, found 23 hours ago
HK$2,819
Return
found 23 hours ago
Select American Airlines flight, departing Mon, 3 Aug from Washington to Tri-Cities, returning Mon, 10 Aug, priced at HK$2,819 found 23 hours ago
Delta
Mon, 3 Aug - Mon, 10 Aug
IAD
Washington
TRI
Tri-Cities
HK$2,894 Return, found 23 hours ago
HK$2,894
Return
found 23 hours ago
Select Delta flight, departing Mon, 3 Aug from Washington to Tri-Cities, returning Mon, 10 Aug, priced at HK$2,894 found 23 hours ago
Delta
Mon, 3 Aug - Mon, 10 Aug
IAD
Washington
TRI
Tri-Cities
HK$2,905 Return, found 23 hours ago
HK$2,905
Return
found 23 hours ago
Select Delta flight, departing Mon, 3 Aug from Washington to Tri-Cities, returning Mon, 10 Aug, priced at HK$2,905 found 23 hours ago
Delta
Mon, 3 Aug - Mon, 10 Aug
IAD
Washington
TRI
Tri-Cities
HK$2,937 Return, found 23 hours ago
HK$2,937
Return
found 23 hours ago
Select Delta flight, departing Mon, 3 Aug from Washington to Tri-Cities, returning Mon, 10 Aug, priced at HK$2,937 found 23 hours 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 acrobat to offer you the most flexible fares in town. Just tick the "No change fee" box right under the "Flexible change policies" filter to find the best flights to Washington County.
Which airlines fly to Washington County?
Find your passport, pack your bags and choose from these major airlines that have flights into or near Washington County:

  • American Airlines - 260 flights to or near Washington County each month, including 260 flights to Tri-Cities Regional Airport (TRI) per month.
  • Delta Air Lines - 108 flights to or near Washington County each month, including 108 flights to Tri-Cities Regional Airport (TRI) per month.
  • Allegiant Air - 17 flights to or near Washington County each month, including 17 flights to Tri-Cities Regional Airport (TRI) per month.

How can I find cheap tickets to Washington County?
You'll always get an amazing deal with Expedia, but our "flexible dates" search function makes it that much easier. Enter your preferred flight date, then click on the flexible dates box above to see the cheapest prices for nearby days. HK$2,271 was the cheapest price for a flight to Washington County in the last seven days.
How much is a flight to Washington County?
The cost of a round-trip ticket to Washington County in the last seven days fluctuated between HK$2,271 and HK$4,413. If you were flying one way from Washington (IAD), you could have picked up a bargain from just HK$2,028.
What are the most popular airports to fly into in Washington County?
Pack your suitcase and fly into Tri-Cities Regional Airport (TRI), Washington County's primary flight hub. Book one of the 385 flights that touch down at this top destination every month.
When is the cheapest time to fly to Washington County?
Jetting off on a Tuesday, followed by a Monday, is generally the best way to land the cheapest flight. Steer clear of weekends if possible, because Saturday is typically the most expensive day. Spend the money you saved having fun in Washington County instead!
How much is a plane ticket to Washington County?
In the last seven days, seats to Washington County varied between HK$2,271 and HK$4,413. Prices usually rise as your travel date nears, so land yourself an awesome deal today.
What is the best time to go to Washington County?
If you want to experience Washington County's leading city when it's buzzing with activity, set off for Bristol sometime in June, July and August. Like most places in the Northern Hemisphere, summer here starts June 20, bringing average temperatures of between 16ºC and 29ºC.
What months are the cheapest to book a flight to Washington County?
February is the cheapest month to reserve a seat for your Washington County escape. Fares are priciest over the busy month of December, so keep clear of this time if possible.

Book with confidence

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.
About Washington County
*Available to Expedia members.