Cheap flights to Jefferson County

View €339 flight on Mon, 2 Feb 2026Opens in a new window

Popular airlines to Jefferson County

  • Alaska Airlines

  • Delta

  • American Airlines

  • United

  • Southwest Airlines

  • Frontier Airlines

  • Air Canada

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Cheap round-trip flights to Jefferson County

Prices were available within the past 7 days and start at €339 for one-way flights and €391 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Tue, 17 Mar - Sun, 29 Mar
DUB
Dublin
SEA
Seattle
€391 Return, found 1 day ago
€391
Return
found 1 day ago
Select Icelandair flight, departing Tue, 17 Mar from Dublin to Seattle, returning Sun, 29 Mar, priced at €391 found 1 day ago
Scandinavian Airlines
Mon, 1 Jun - Sun, 7 Jun
DUB
Dublin
SEA
Seattle
€408 Return, found 12 hours ago
€408
Return
found 12 hours ago
Select Scandinavian Airlines flight, departing Mon, 1 Jun from Dublin to Seattle, returning Sun, 7 Jun, priced at €408 found 12 hours ago
British Airways
Mon, 23 Feb - Sun, 8 Mar
DUB
Dublin
SEA
Seattle
€417 Return, found 10 hours ago
€417
Return
found 10 hours ago
Select British Airways flight, departing Mon, 23 Feb from Dublin to Seattle, returning Sun, 8 Mar, priced at €417 found 10 hours ago
Lufthansa
Fri, 6 Mar - Thu, 12 Mar
LHR
London
SEA
Seattle
€426 Return, found 1 day ago
€426
Return
found 1 day ago
Select Lufthansa flight, departing Fri, 6 Mar from London to Seattle, returning Thu, 12 Mar, priced at €426 found 1 day ago
Iberia
Sun, 8 Nov - Wed, 18 Nov
DUB
Dublin
SEA
Seattle
€427 Return, found 2 days ago
€427
Return
found 2 days ago
Select Iberia flight, departing Sun, 8 Nov from Dublin to Seattle, returning Wed, 18 Nov, priced at €427 found 2 days ago
Aer Lingus
Fri, 27 Feb - Sun, 15 Mar
DUB
Dublin
SEA
Seattle
€429 Return, found 6 hours ago
€429
Return
found 6 hours ago
Select Aer Lingus flight, departing Fri, 27 Feb from Dublin to Seattle, returning Sun, 15 Mar, priced at €429 found 6 hours ago
Lufthansa
Mon, 9 Mar - Mon, 16 Mar
LHR
London
SEA
Seattle
€431 Return, found 4 days ago
€431
Return
found 4 days ago
Select Lufthansa flight, departing Mon, 9 Mar from London to Seattle, returning Mon, 16 Mar, priced at €431 found 4 days ago
American Airlines
Wed, 25 Nov - Mon, 30 Nov
DUB
Dublin
SEA
Seattle
€434 Return, found 10 hours ago
€434
Return
found 10 hours ago
Select American Airlines flight, departing Wed, 25 Nov from Dublin to Seattle, returning Mon, 30 Nov, priced at €434 found 10 hours ago
Delta
Sun, 8 Mar - Sun, 15 Mar
LHR
London
SEA
Seattle
€443 Return, found 1 day ago
€443
Return
found 1 day ago
Select Delta flight, departing Sun, 8 Mar from London to Seattle, returning Sun, 15 Mar, priced at €443 found 1 day ago
United
Fri, 6 Mar - Thu, 12 Mar
LHR
London
SEA
Seattle
€447 Return, found 1 day ago
€447
Return
found 1 day ago
Select United flight, departing Fri, 6 Mar from London to Seattle, returning Thu, 12 Mar, priced at €447 found 1 day ago

About Jefferson County

Expedia offers flights to Jefferson County to meet every traveller's needs. Whatever your flight need - Expedia has the flight for you. So choose from flights to Jefferson 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 Jefferson County that have flexible change policies?
When it comes to flying these days, flexibility is key. That's why we've added a "No change fee" search function to help you track down flexible, affordable fares to Jefferson County. It's near the top left of your screen right underneath the "Flexible change policies" heading.
Which airlines fly to Jefferson County?
Settle on your travel dates and then take off towards Jefferson County with one of these leading airlines:

  • Alaska Airlines - 8,781 flights to or near Jefferson County each month, including 8,781 flights to Seattle - Tacoma Intl. Airport (SEA) per month.
  • Delta Air Lines - 4,186 flights to or near Jefferson County each month, including 4,186 flights to Seattle - Tacoma Intl. Airport (SEA) per month.
  • United Airlines - 828 flights to or near Jefferson County each month, including 828 flights to Seattle - Tacoma Intl. Airport (SEA) per month.

How can I find cheap tickets to Jefferson County?
To nab a terrific deal to Jefferson County, book in advance. Also make use of Expedia's "flexible dates" feature at the top of your search results. This will compare prices for nearby days. In the last seven days, €391 was the best price for a flight to Jefferson County.
How much is a flight to Jefferson County?
The cost of a round-trip flight to Jefferson County in the last seven days ranged between €391 and €447. If you were flying one way from London (LHR), you could have gotten a great deal from just €339.
What are the most popular airports to fly into in Jefferson County?
The primary gateway to Jefferson County, roughly 15,456 flights land at Seattle - Tacoma Intl. Airport (SEA) each month. Scout around for an unbeatable deal, lock in your fare and get ready to discover this amazing region.
How much is a plane ticket to Jefferson County?
In the last seven days, plane tickets to Jefferson County ranged between €391 and €447. Prices generally depend on the departure time, cabin class, airline and how early you make your booking.
What is the best time to go to Jefferson County?
If you'd love to check out Jefferson County's leading city at its busiest, visit Port Townsend sometime during March, April and June. Similar to most places in the Northern Hemisphere, summer here begins June 20, with average temperatures of between 13ºC and 18ºC.
What months are the cheapest to book a flight to Jefferson County?
The cheapest month to land a fabulous deal to Jefferson County is February, whereas prices are at their highest in December. Avoid this month if you want to save your dollars.

Trending flights to Jefferson 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.

Icelandair
Tue, 17 Mar - Sun, 29 Mar
DUB
Dublin
SEA
Seattle
€391 Return, found 1 day ago
€391
Return
found 1 day ago
Select Icelandair flight, departing Tue, 17 Mar from Dublin to Seattle, returning Sun, 29 Mar, priced at €391 found 1 day ago
*Available to Expedia members.