Cheap Flights to Franklin County from ₩128,200

View ₩128,200 flight on Thu, Feb 12, 2026Opens in a new window

Popular airlines to Franklin 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

  • notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
  • deals illustration

    Book smarter

    Save up to 40% on select hotels after you book a flight*
  • trophy illustration

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

How much is the cheapest flight to Franklin County?

Prices were available within the past 7 days and start at ₩128,200 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 5 days ago
₩282,200
Roundtrip
found 5 days ago
Select Delta flight, departing Sat, May 16 from Seattle to St. Louis, returning Tue, May 19, priced at ₩282,200 found 5 days ago
Delta
Wed, May 27 - Mon, Jun 1
SEA
Seattle
STL
St. Louis
₩299,400 Roundtrip, found 4 days ago
₩299,400
Roundtrip
found 4 days ago
Select Delta flight, departing Wed, May 27 from Seattle to St. Louis, returning Mon, Jun 1, priced at ₩299,400 found 4 days ago
Delta
Sat, May 16 - Wed, May 27
SEA
Seattle
STL
St. Louis
₩305,200 Roundtrip, found 5 days ago
₩305,200
Roundtrip
found 5 days ago
Select Delta flight, departing Sat, May 16 from Seattle to St. Louis, returning Wed, May 27, priced at ₩305,200 found 5 days ago
Alaska Airlines
Sat, May 2 - Sat, May 16
SEA
Seattle
STL
St. Louis
₩311,300 Roundtrip, found 5 days ago
₩311,300
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Sat, May 2 from Seattle to St. Louis, returning Sat, May 16, priced at ₩311,300 found 5 days ago
Delta
Fri, May 1 - Mon, May 18
SEA
Seattle
STL
St. Louis
₩312,300 Roundtrip, found 5 days ago
₩312,300
Roundtrip
found 5 days ago
Select Delta flight, departing Fri, May 1 from Seattle to St. Louis, returning Mon, May 18, priced at ₩312,300 found 5 days ago
Alaska Airlines
Fri, May 1 - Sat, May 16
SEA
Seattle
STL
St. Louis
₩325,700 Roundtrip, found 5 days ago
₩325,700
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Fri, May 1 from Seattle to St. Louis, returning Sat, May 16, priced at ₩325,700 found 5 days ago
Delta
Sat, Jun 6 - Mon, Jun 22
SEA
Seattle
STL
St. Louis
₩328,100 Roundtrip, found 5 days ago
₩328,100
Roundtrip
found 5 days ago
Select Delta flight, departing Sat, Jun 6 from Seattle to St. Louis, returning Mon, Jun 22, priced at ₩328,100 found 5 days ago
United
Tue, May 19 - Sat, Jun 6
SEA
Seattle
STL
St. Louis
₩481,700 Roundtrip, found 5 days ago
₩481,700
Roundtrip
found 5 days ago
Select United flight, departing Tue, May 19 from Seattle to St. Louis, returning Sat, Jun 6, priced at ₩481,700 found 5 days ago
American Airlines
Tue, May 19 - Sat, Jun 6
SEA
Seattle
STL
St. Louis
₩503,400 Roundtrip, found 5 days ago
₩503,400
Roundtrip
found 5 days ago
Select American Airlines flight, departing Tue, May 19 from Seattle to St. Louis, returning Sat, Jun 6, priced at ₩503,400 found 5 days ago
Hawaiian Airlines
Thu, Mar 12 - Sun, Mar 15
LAS
Las Vegas
STL
St. Louis
₩677,300 Roundtrip, found 4 hours ago
₩677,300
Roundtrip
found 4 hours ago
Select Hawaiian Airlines flight, departing Thu, Mar 12 from Las Vegas to St. Louis, returning Sun, Mar 15, priced at ₩677,300 found 4 hours ago

About Franklin County

Expedia offers flights to Franklin County to meet every traveler's needs. Whatever your flight need - Expedia has the flight for you. So choose from flights to Franklin 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 Franklin County that have flexible change policies?
At Expedia, we've been channeling our inner yoga master to provide you with the most flexible airfares in town. Simply check the "No change fee" box right underneath the "Flexible change policies" heading to find your perfect flight to Franklin County.
Which airlines fly to Franklin County?
With a great range of airlines operating flights into or near Franklin County, the choice is yours:

  • Southwest Airlines - 2,214 flights to or near Franklin County each month, including 2,214 flights to Lambert-St. Louis Intl. Airport (STL) per month.
  • American Airlines - 789 flights to or near Franklin County each month, including 789 flights to Lambert-St. Louis Intl. Airport (STL) per month.
  • Delta Air Lines - 650 flights to or near Franklin County each month, including 650 flights to Lambert-St. Louis Intl. Airport (STL) per month.

How can I find cheap tickets to Franklin County?
You'll always walk away with an awesome deal with Expedia, but our "flexible dates" feature makes it that much easier. Enter your preferred travel date, then check the flexible dates box above to reveal the cheapest prices for nearby days. ₩282,200 was the cheapest price for a flight to Franklin County in the last seven days.
How much is a flight to Franklin County?
If you were flying one way from Seattle (SEA), you could've nabbed a cheap ticket for just ₩128,200 in the last seven days. Round-trip journeys to Franklin County ranged from only ₩282,200 to ₩908,300 during this same period.
What are the most popular airports to fly into in Franklin County?
Get ready to pack your bags and jet into Lambert-St. Louis Intl. Airport (STL), Franklin County's main flight hub. Secure a seat on one of the 4,902 flights that land here every month.
When is the cheapest time to fly to Franklin County?
Consider leaving earlier in the week to score the best airfare to Franklin County. Tuesday is routinely the most affordable day to fly, with Monday a close second. Saturday often has the highest prices. This is because many travelers choose to start their trip on a weekend.
How much is a plane ticket to Franklin County?
In the last seven days, airfares to Franklin County ranged between ₩282,200 and ₩908,300. Prices tend to rise over time, so find a top deal today.
What is the best time to go to Franklin County?
Summer begins June 20 in the Northern Hemisphere, and these warmer months are a fantastic time to visit the top Franklin County city of Washington. Average temperatures fluctuate between 65ºF and 85ºF throughout this season. The biggest crowds flock here in April, June and September.
What months are the cheapest to book a flight to Franklin County?
The best month to book low-cost airfares to Franklin County is February. Bear in mind that in the U.S, an expensive time to secure a ticket is during the busy month of December.

Trending flights to Franklin 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, Mar 30 - Wed, Apr 8
ICN
Seoul
STL
St. Louis
₩908,300 Roundtrip, found 4 days ago
₩908,300
Roundtrip
found 4 days ago
Select American Airlines flight, departing Mon, Mar 30 from Seoul to St. Louis, returning Wed, Apr 8, priced at ₩908,300 found 4 days ago
*Available to Expedia members.