Flight Destinations in Jefferson County

View ฿3,980 flight on Sun, 15 Mar 2026Opens in a new window

Popular airlines to Jefferson County

  • American Airlines

  • Delta

  • United

  • Southwest Airlines

  • Frontier Airlines

  • Alaska Airlines

  • Air Canada

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 40% 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 Jefferson County

Prices were available within the past 7 days and start at ฿3,980 for one-way flights and ฿8,875 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, 21 May - Wed, 27 May
PDX
Portland
STL
St. Louis
฿8,875 Return, found 1 day ago
฿8,875
Return
found 1 day ago
Select Delta flight, departing Thu, 21 May from Portland to St. Louis, returning Wed, 27 May, priced at ฿8,875 found 1 day ago
United
Thu, 21 May - Wed, 27 May
PDX
Portland
STL
St. Louis
฿9,395 Return, found 1 day ago
฿9,395
Return
found 1 day ago
Select United flight, departing Thu, 21 May from Portland to St. Louis, returning Wed, 27 May, priced at ฿9,395 found 1 day ago
Delta
Thu, 21 May - Wed, 27 May
PDX
Portland
STL
St. Louis
฿9,800 Return, found 1 day ago
฿9,800
Return
found 1 day ago
Select Delta flight, departing Thu, 21 May from Portland to St. Louis, returning Wed, 27 May, priced at ฿9,800 found 1 day ago
United
Thu, 21 May - Wed, 27 May
PDX
Portland
STL
St. Louis
฿10,820 Return, found 1 day ago
฿10,820
Return
found 1 day ago
Select United flight, departing Thu, 21 May from Portland to St. Louis, returning Wed, 27 May, priced at ฿10,820 found 1 day ago
Delta
Wed, 1 Apr - Tue, 7 Apr
SFO
San Francisco
STL
St. Louis
฿12,660 Return, found 2 days ago
฿12,660
Return
found 2 days ago
Select Delta flight, departing Wed, 1 Apr from San Francisco to St. Louis, returning Tue, 7 Apr, priced at ฿12,660 found 2 days ago
United
Mon, 9 Mar - Tue, 17 Mar
SFO
San Francisco
STL
St. Louis
฿14,945 Return, found 6 days ago
฿14,945
Return
found 6 days ago
Select United flight, departing Mon, 9 Mar from San Francisco to St. Louis, returning Tue, 17 Mar, priced at ฿14,945 found 6 days ago
American Airlines
Mon, 9 Mar - Tue, 17 Mar
SFO
San Francisco
STL
St. Louis
฿15,575 Return, found 6 days ago
฿15,575
Return
found 6 days ago
Select American Airlines flight, departing Mon, 9 Mar from San Francisco to St. Louis, returning Tue, 17 Mar, priced at ฿15,575 found 6 days ago
Philippine Airlines
Fri, 28 Aug - Fri, 2 Oct
BKK
Bangkok
STL
St. Louis
฿32,110 Return, found 2 days ago
฿32,110
Return
found 2 days ago
Select Philippine Airlines flight, departing Fri, 28 Aug from Bangkok to St. Louis, returning Fri, 2 Oct, priced at ฿32,110 found 2 days ago
EVA Airways
Tue, 28 Apr - Thu, 28 May
CNX
Chiang Mai
STL
St. Louis
฿33,450 Return, found 5 days ago
฿33,450
Return
found 5 days ago
Select EVA Airways flight, departing Tue, 28 Apr from Chiang Mai to St. Louis, returning Thu, 28 May, priced at ฿33,450 found 5 days ago
Air Canada
Fri, 1 May - Mon, 11 May
BKK
Bangkok
STL
St. Louis
฿36,815 Return, found 4 days ago
฿36,815
Return
found 4 days ago
Select Air Canada flight, departing Fri, 1 May from Bangkok to St. Louis, returning Mon, 11 May, priced at ฿36,815 found 4 days ago

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.

Philippine Airlines
Fri, 28 Aug - Fri, 2 Oct
BKK
Bangkok
STL
St. Louis
฿32,110 Return, found 2 days ago
฿32,110
Return
found 2 days ago
Select Philippine Airlines flight, departing Fri, 28 Aug from Bangkok to St. Louis, returning Fri, 2 Oct, priced at ฿32,110 found 2 days ago

Book with confidence

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.
About Jefferson County

Explore a world of travel with Expedia

*Available to Expedia members.