St Louis to Washington (STL–DCA) — Airlines, Schedules & Connections
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No nonstop flights on this route. connecting options below.
STL–DCA is served by 2 airlines with nonstop service. Southwest Airlines and American Airlines lead the route. The flight covers 717 miles in approximately 1h 55m. Beyond nonstop, 65 hubs offer 1-stop connections.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| WN Southwest Airlines | 52 | 737, 7M8, 7S7 | 1h55-2h05 | – | – | |
| AA American Airlines | 31 | CR7, CR9 | 2h08-2h15 | Oneworld | – |
Weekly Schedule Pattern
Connection Landscape
On-Time Performance
Travel Essentials
STL: EDT · DCA: EDT
When it's 6:00 PM in St Louis, it's 6:00 PM in Washington.
The Metro station is inside Terminal B/C with covered walkway access; Terminal A requires a short outdoor walk or shuttle. Yellow and Blue line trains run to downtown DC in 15–25 minutes for $2.25–$3.85.
Taxis and Uber/Lyft operate from designated pick-up zones outside each terminal; fares to downtown run $15–30. DCA serves the National Mall area and is well-positioned for the U.S. Capitol, Pentagon, and downtown offices. International arrivals clear customs at DCA only for pre-cleared flights; most international traffic uses IAD (Dulles). Rental cars are in a consolidated facility accessible by shuttle.
Humid subtropical climate. Summers (June–August) are hot and very humid at 29–34°C with frequent afternoon thunderstorms causing ground stops and airspace flow programs. The summer storm season is the primary operational disruption risk at DCA. Spring and autumn are transitional with variable conditions and occasional severe thunderstorm outbreaks.
Winters (December–February) bring cold temperatures (−2 to 7°C) with occasional snowstorms that disproportionately affect the DC area due to limited snow-removal infrastructure. Even moderate snowfall (5–10 cm) can shut regional airports for hours. Pack layers for winter; the region's storm response is notoriously inconsistent.
STL–DCA Quick Facts
Frequently Asked Questions
Flights from STL to DCA
St. Louis Lambert International Airport (STL) and Ronald Reagan Washington National Airport (DCA) are connected by nonstop service from American Airlines and Southwest Airlines. With 83 weekly departures, this is a heavily served route.
STL to DCA Flight Duration and Schedule
Nonstop flight time from STL to DCA ranges from 1 hours 55 minutes to 2 hours 15 minutes. The route covers a distance of 717 miles (1,154 km). There are approximately 83 weekly flights outbound and 85 return, totaling 168 flights per week in both directions.
Connecting Options and Alternatives
65 one-stop connections are available, with the fastest taking approximately 4 hours via DAY. Two-stop connections are also available via intermediate hubs.