Cheap Flights to Jefferson County from ₩141,900

View ₩141,900 flight on Tue, May 19, 2026Opens in a new window

Popular airlines to Jefferson County

  • American Airlines

    American Airlines

  • Delta

    Delta

  • United

    United

  • Southwest Airlines

    Southwest Airlines

  • Frontier Airlines

    Frontier Airlines

  • Alaska Airlines

    Alaska Airlines

  • Air Canada

    Air Canada

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How much is the cheapest flight to Jefferson County?

Prices were available within the past 7 days and start at ₩141,900 for one-way flights and ₩282,200 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, May 16 - Tue, May 19
SEA
Seattle
STL
St. Louis
₩282,200 Roundtrip, found 2 days ago
₩282,200
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, May 16 from Seattle to St. Louis, returning Tue, May 19, priced at ₩282,200 found 2 days ago
Delta
Wed, May 27 - Mon, Jun 1
SEA
Seattle
STL
St. Louis
₩299,400 Roundtrip, found 1 day ago
₩299,400
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, May 27 from Seattle to St. Louis, returning Mon, Jun 1, priced at ₩299,400 found 1 day ago
Delta
Sat, May 16 - Wed, May 27
SEA
Seattle
STL
St. Louis
₩305,200 Roundtrip, found 2 days ago
₩305,200
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, May 16 from Seattle to St. Louis, returning Wed, May 27, priced at ₩305,200 found 2 days ago
Alaska Airlines
Sat, May 2 - Sat, May 16
SEA
Seattle
STL
St. Louis
₩311,300 Roundtrip, found 2 days ago
₩311,300
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Sat, May 2 from Seattle to St. Louis, returning Sat, May 16, priced at ₩311,300 found 2 days ago
Delta
Fri, May 1 - Mon, May 18
SEA
Seattle
STL
St. Louis
₩312,300 Roundtrip, found 2 days ago
₩312,300
Roundtrip
found 2 days ago
Select Delta flight, departing Fri, May 1 from Seattle to St. Louis, returning Mon, May 18, priced at ₩312,300 found 2 days ago
Alaska Airlines
Fri, May 1 - Sat, May 16
SEA
Seattle
STL
St. Louis
₩325,700 Roundtrip, found 2 days ago
₩325,700
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Fri, May 1 from Seattle to St. Louis, returning Sat, May 16, priced at ₩325,700 found 2 days ago
Delta
Sat, Jun 6 - Mon, Jun 22
SEA
Seattle
STL
St. Louis
₩328,100 Roundtrip, found 2 days ago
₩328,100
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Jun 6 from Seattle to St. Louis, returning Mon, Jun 22, priced at ₩328,100 found 2 days ago
United
Tue, May 19 - Sat, Jun 6
SEA
Seattle
STL
St. Louis
₩481,700 Roundtrip, found 2 days ago
₩481,700
Roundtrip
found 2 days ago
Select United flight, departing Tue, May 19 from Seattle to St. Louis, returning Sat, Jun 6, priced at ₩481,700 found 2 days ago
American Airlines
Tue, May 19 - Sat, Jun 6
SEA
Seattle
STL
St. Louis
₩503,400 Roundtrip, found 2 days ago
₩503,400
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, May 19 from Seattle to St. Louis, returning Sat, Jun 6, priced at ₩503,400 found 2 days ago
Korean Air
Sun, Jan 25 - Sun, Feb 1
ICN
Seoul
STL
St. Louis
₩1,253,700 Roundtrip, found 6 days ago
₩1,253,700
Roundtrip
found 6 days ago
Select Korean Air flight, departing Sun, Jan 25 from Seoul to St. Louis, returning Sun, Feb 1, priced at ₩1,253,700 found 6 days ago

About Jefferson County

Expedia offers flights to Jefferson County to meet every traveler'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.

Trending flights to Jefferson 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, Feb 2 - Fri, Feb 6
ICN
Seoul
STL
St. Louis
₩869,300 Roundtrip, found 6 days ago
₩869,300
Roundtrip
found 6 days ago
Select American Airlines flight, departing Mon, Feb 2 from Seoul to St. Louis, returning Fri, Feb 6, priced at ₩869,300 found 6 days ago
*Available to Expedia members.