Flight to Jefferson County

View S$89 flight on Thu, 9 Apr, 2026Opens in a new window

Popular airlines to Jefferson County

  • Alaska Airlines

  • Delta

  • American Airlines

  • United

  • Southwest Airlines

  • Frontier Airlines

  • JetBlue Airways

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Cheap round-trip flights to Jefferson County

Prices were available within the past 7 days and start at S$89 for one-way flights and S$213 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, 24 Mar - Tue, 7 Apr
ONT
Ontario
SEA
Seattle
S$213 Return, found 1 day ago
S$213
Return
found 1 day ago
Select Delta flight, departing Tue, 24 Mar from Ontario to Seattle, returning Tue, 7 Apr, priced at S$213 found 1 day ago
Alaska Airlines
Thu, 26 Mar - Wed, 8 Apr
ONT
Ontario
SEA
Seattle
S$320 Return, found 1 day ago
S$320
Return
found 1 day ago
Select Alaska Airlines flight, departing Thu, 26 Mar from Ontario to Seattle, returning Wed, 8 Apr, priced at S$320 found 1 day ago
United
Mon, 9 Mar - Mon, 16 Mar
ONT
Ontario
SEA
Seattle
S$491 Return, found 1 day ago
S$491
Return
found 1 day ago
Select United flight, departing Mon, 9 Mar from Ontario to Seattle, returning Mon, 16 Mar, priced at S$491 found 1 day ago
Singapore Airlines
Thu, 18 Jun - Sat, 12 Sept
SIN
Singapore
SEA
Seattle
S$945 Return, found 4 days ago
S$945
Return
found 4 days ago
Select Singapore Airlines flight, departing Thu, 18 Jun from Singapore to Seattle, returning Sat, 12 Sept, priced at S$945 found 4 days ago
Cathay Pacific
Thu, 7 May - Thu, 14 May
SIN
Singapore
SEA
Seattle
S$996 Return, found 1 hour ago
S$996
Return
found 1 hour ago
Select Cathay Pacific flight, departing Thu, 7 May from Singapore to Seattle, returning Thu, 14 May, priced at S$996 found 1 hour ago
China Airlines
Thu, 21 May - Fri, 22 May
SIN
Singapore
SEA
Seattle
S$1,011 Return, found 5 days ago
S$1,011
Return
found 5 days ago
Select China Airlines flight, departing Thu, 21 May from Singapore to Seattle, returning Fri, 22 May, priced at S$1,011 found 5 days ago
STARLUX Airlines
Thu, 23 Apr - Tue, 28 Apr
SIN
Singapore
SEA
Seattle
S$1,034 Return, found 5 days ago
S$1,034
Return
found 5 days ago
Select STARLUX Airlines flight, departing Thu, 23 Apr from Singapore to Seattle, returning Tue, 28 Apr, priced at S$1,034 found 5 days ago
Hainan Airlines
Wed, 13 May - Thu, 28 May
SIN
Singapore
SEA
Seattle
S$1,078 Return, found 6 hours ago
S$1,078
Return
found 6 hours ago
Select Hainan Airlines flight, departing Wed, 13 May from Singapore to Seattle, returning Thu, 28 May, priced at S$1,078 found 6 hours ago
Korean Air
Wed, 23 Dec - Sat, 2 Jan
SIN
Singapore
SEA
Seattle
S$1,103 Return, found 3 days ago
S$1,103
Return
found 3 days ago
Select Korean Air flight, departing Wed, 23 Dec from Singapore to Seattle, returning Sat, 2 Jan, priced at S$1,103 found 3 days ago
Asiana Airlines
Thu, 24 Dec - Sat, 2 Jan
SIN
Singapore
SEA
Seattle
S$1,103 Return, found 2 hours ago
S$1,103
Return
found 2 hours ago
Select Asiana Airlines flight, departing Thu, 24 Dec from Singapore to Seattle, returning Sat, 2 Jan, priced at S$1,103 found 2 hours ago

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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.

Singapore Airlines
Thu, 18 Jun - Sat, 12 Sept
SIN
Singapore
SEA
Seattle
S$945 Return, found 4 days ago
S$945
Return
found 4 days ago
Select Singapore Airlines flight, departing Thu, 18 Jun from Singapore to Seattle, returning Sat, 12 Sept, priced at S$945 found 4 days ago

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, S$213 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 S$213 and S$1,103. If you were flying one way from Ontario (ONT), you could have gotten a great deal from just S$89.
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.
When is the cheapest time to fly to Jefferson County?
Fly out on a Tuesday to boost your odds of securing the cheapest flight to Jefferson County. Mondays are usually the second most affordable day to depart. Saturday is generally the most expensive day to fly anywhere.
How much is a plane ticket to Jefferson County?
In the last seven days, plane tickets to Jefferson County ranged between S$213 and S$1,103. 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.

Book with confidence

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.

Travel information

Jefferson County Flights Information

Airlines serving
Delta, Alaska Airlines, United, American Airlines, Singapore Airlines, Hainan Airlines, China Airlines, STARLUX Airlines, All Nippon Airways, EVA Airways, Cathay Pacific, Korean Air, Asiana Airlines
Roundtrip price
from S$213
Jefferson County Flights Information

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