Southwest Airlines flights from STL to DCA
Find comprehensive Southwest Airlines flight information, schedules, and booking details for direct flights from STL to DCA. Southwest Airlines operates 6-11 flights daily flights on this route.• Flight Duration: 1h 55m - 2h 18m (average flight time)• Distance: 721 miles (1160 km) (air miles between airports)• Daily Flights: 6-11 flights (scheduled departures per day)
STL
DCA
FLIGHT TIME
1h 55m - 2h 18m
FLIGHT DISTANCE
721 miles (1160 km)
1h 55m - 2h 0m
08:40
19:55
721 miles (1160 km)
March
1 (Show)
54
Southwest Airlines Flight Schedule from STL to DCA
| Flight | Airline | Departure | Arrival | Aircraft |
|---|---|---|---|---|
WN2333 |  Southwest Airlines | 08:40 | 11:35:00 | Boeing 737MAX 8 Passenger |
WN2407 | Southwest Airlines | 13:15 | 16:15:00 | Boeing 737-700 (winglets) Passenger/BBJ1 |
WN4425 | Southwest Airlines | 15:55 | 18:50:00 | Boeing 737-800 (winglets) Passenger/BBJ2 |
WN4426 | Southwest Airlines | 19:55 | 22:50:00 | Boeing 737MAX 8 Passenger |
Southwest Airlines Monthly Flight Calendar
December 2025
Route Insights
Duration variability: Flight duration on this route can vary based on aircraft type, wind conditions, and airline scheduling. Average duration is 1h 55m - 2h 18m.
Pricing patterns: March typically offers lower prices due to reduced demand outside peak travel seasons.
Best departure times: Peak departure times are 8:00, 13:00, 15:00, offering more flight options and potentially better connections.
STL - DCA flight price statistics
$301
ApproximateThe numbers are average prices found based on user searches for direct flights between the airports. It's calculated from the cheapest prices found per month for a round-trip with 1 adult and can vary depending on the amount of data we have for this particular route.
$209
Jan$229
Feb$173
Mar$247
Apr$247
May$323
Jun$282
Jul$382
Aug$347
Sep$342
Oct$472
Nov$362
DecSouthwest Airlines Terminal Information
Departure Terminal at STL:
• Terminal : Southwest Airlines operates from this terminal
Frequently Asked Questions about Southwest Airlines Flights
How many Southwest Airlines flights operate from STL to DCA?
Southwest Airlines operates 4 flights from STL to DCA.
What city does DCA airport serve?
DCA airport serves Arlington.
How long is the Southwest Airlines flight from STL to DCA?
The flight duration is approximately 1h 55m - 2h 18m.
What is the distance from STL to DCA?
The distance is 721 miles (1160 km).
What aircraft does Southwest Airlines use on this route?
Southwest Airlines uses Boeing 737MAX 8 Passenger, Boeing 737-700 (winglets) Passenger/BBJ1, Boeing 737-800 (winglets) Passenger/BBJ2 on this route.
Which other airlines operate on this route?
1 other airline operates on this route: American Airlines.
What are the earliest and latest Southwest Airlines flight departure times?
The earliest Southwest Airlines flight departs at 08:40 and the latest departs at 19:55.
What is the cheapest month to fly Southwest Airlines from STL to DCA?
March is typically the cheapest month to fly Southwest Airlines on this route.
What is the average price for a Southwest Airlines flight from STL to DCA?
The average price for a round-trip Southwest Airlines flight on this route is approximately $301. Prices can vary based on booking time and demand.
How many Southwest Airlines flights operate per week on this route?
Southwest Airlines operates approximately 54 flights per week from STL to DCA.