Southwest® flights from Washington, D.C. (Reagan National) to St. Louis from $109
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Low fares from Washington, D.C. (Reagan National) to St. Louis
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Washington, D.C. (Reagan National) (DCA)to
St. Louis (STL)
Depart: 11/12/2026
One-way
Basic
From
$109
Seen: 17 hrs ago
Washington, D.C. (Reagan National) (DCA)to
St. Louis (STL)
Depart: 10/10/2026
One-way
Basic
From
$109
Seen: 12 hrs ago
Washington, D.C. (Reagan National) (DCA)to
St. Louis (STL)
Depart: 09/15/2026
One-way
Basic
From
$109
Seen: 22 hrs ago
Washington, D.C. (Reagan National) (DCA)to
St. Louis (STL)
Depart: 10/03/2026
One-way
Basic
From
$109
Seen: 20 hrs ago
Washington, D.C. (Reagan National) (DCA)to
St. Louis (STL)
Depart: 10/12/2026
One-way
Basic
From
$119
Seen: 15 hrs ago
Washington, D.C. (Reagan National) (DCA)to
St. Louis (STL)
Depart: 11/05/2026
One-way
Basic
From
$119
Seen: 9 hrs ago
Explore flights from Washington, D.C. (Reagan National) to St. Louis
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Flight Details
Departing from:
Ronald Reagan National Airport
Arriving at:
Lambert-St Louis Int'l Airport
Average flight time:
2 hours 16 minutes
Distance:
719 miles
Route Information
156† Weekly flights
- 4‡ Nonstop flights per day Monday through Friday
- 3‡ Nonstop flights on Saturday
- 4‡ Nonstop flights on Sunday
† Weekly flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025. Note: route may not operate every day of the week.
‡ Nonstop flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025.
Questions we hear the most
The average flight time from Washington, D.C. (Reagan National) to St. Louis is 2 hours 16 minutes.
There are 156 weekly flights from Washington, D.C. (Reagan National) to St. Louis on Southwest Airlines.
Yes, Southwest flies nonstop from Washington, D.C. (Reagan National) to St. Louis 4 times per day from Monday through Friday.
Yes, Southwest flies nonstop from Washington, D.C. (Reagan National) to St. Louis 3 times per day on Saturdays and 4 times per day on Sundays.
To find the lowest fares by day and time to fly Washington, D.C. (Reagan National) to St. Louis with Southwest, check out our Low Fare Calendar.
You can rent a car at Lambert-St Louis Int'l Airport book yours with your flight.
Yes! Flights from Washington, D.C. (Reagan National) to St. Louis—or from here or there to anywhere—can be changed with no change fees. Fare difference may apply.
Check the status of your upcoming Southwest flight.
Check out the Southwest Airlines® Help Center for answers about everything Southwest.
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