St. Louis Lambert International Airport
St. Louis, United StatesSTL / KSTL
Major airport · 88 direct destinations · 4 runways · longest runway 11,020 ft
57 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center
Route
St. Louis → Washington
STL
St. LouisSt. Louis Lambert International Airport
St. LouisSt. Louis Lambert International AirportDCAWashingtonRonald Reagan Washington National Airport
WashingtonRonald Reagan Washington National Airport- Distance
- 717 mi
- Estimated flight time
- ~1h 55m
Washington is currently 1 hour ahead of St. Louis.
Observed nonstop
How often does this route fly?
Frequency
Several times a day
On average around 6 flights a day, observed from October 2025 to September 2026.
- 6
- flights per day
- 8
- busiest month · Nov
- 6
- quietest month · Dec
- 1 hr 34 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 6Jan2026
- 7Feb
- 6Mar
- 7Apr
- 6May
- 6Jun
- 6Jul
- 6Aug
- 6.5Sep
- 7Oct2025
- 8Nov
- 6Dec
Airlines
Who flies it
Southwest Airlinesall year
PSA Airlinesall year
Republic Airwayswinter
American Airlineswinter
Envoy Airnow and then
Through the day
Departure times
Local time in St. Louis. Most departures between 06:00 and 09:00.
- 00:00
- 01:00
- 02:00
- 03:00
- 04:00
- 05:00
- 06:00
- 07:00
- 08:00
- 09:00
- 10:00
- 11:00
- 12:00
- 13:00
- 14:00
- 15:00
- 16:00
- 17:00
- 18:00
- 19:00
- 20:00
- 21:00
- 22:00
- 23:00
Through the week
By weekday
- 6.4Mon
- 6.3Tue
- 6.6Wed
- 6.4Thu
- 6.5Fri
- 4.8Sat
- 4.6Sun
Fleet
Aircraft observed
- Boeing 737-700B73735%
- Boeing 737 MAX 8B38M17%
- Embraer 175E75L12%
- Bombardier CRJ700CRJ711%
- Bombardier CRJ900CRJ911%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 6 | 172 |
|
| February 2026 | 7 | 167 |
|
| March 2026 | 6 | 174 |
|
| April 2026 | 7 | 174 |
|
| May 2026 | 6 | 169 |
|
| June 2026 | 6 | 180 |
|
| July 2026 | 6 | 182 |
|
| August 2026 | 6 | 163 |
|
| September 2026 | 6.5 | 188 |
|
| October 2025 | 7 | 209 |
|
| November 2025 | 8 | 199 |
|
| December 2025 | 6 | 174 |
|
Airlines observed on this route
From observed callsign routes on STL-DCA - not a booking guarantee.
About this route
- Domestic route: both airports are in the same country.
- The opposite direction has also been observed as a direct connection.
- Direct destinations observed from St. Louis: 88.
- Direct destinations observed from Washington: 111.
The airports on this route
Ronald Reagan Washington National Airport
Washington, United StatesDCA / KDCA
Major airport · 111 direct destinations · 3 runways · longest runway 7,169 ft
72 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center
Alternative airports for this journey
Same journey, a different airport nearby - with an observed direct connection.
About the route from St. Louis to Washington
The observed direct connection between St. Louis Lambert International Airport (STL) and Ronald Reagan Washington National Airport (DCA) covers approximately 717 mi. The estimated flight time is around 1h 55m. American Airlines, Envoy Air, PSA Airlines, Republic Airways and Southwest Airlines have been observed on this connection in the available route data.
Frequently asked questions about this route
- How far is St. Louis from Washington by air?
- The great-circle distance between St. Louis Lambert International Airport and Ronald Reagan Washington National Airport is approximately 717 mi.
- How long is the flight from St. Louis to Washington?
- Based on the distance, the estimated flight time is about 1h 55m. This is an estimate, not a schedule.
- Is there a direct connection from St. Louis to Washington?
- Yes, a direct connection between STL and DCA has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: American Airlines, Envoy Air, PSA Airlines, Republic Airways and Southwest Airlines.
- How often is there a flight from St. Louis to Washington?
- On average around 6 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 2,151 observed flights. Mainly Southwest Airlines, PSA Airlines, Republic Airways. That is an observation, not a timetable.
- What is the current time difference between St. Louis and Washington?
- Washington is currently 1 hour ahead of St. Louis.
Where this data comes from
The route data comes from the flight archive (ADS-B, adsb.lol): which connections actually flew over the last twelve full months and who flew them, combined with our own airport, runway, and airline datasets. It is reference data about observed routes - not a current timetable and no claim about bookability.
The frequency and aircraft on this page come from the flight archive (ADS-B, 12 months, October 2025 to September 2026), summarized per route per month. We do not see every flight, so it is a floor, not a count.
Route data updated on October 11, 2026.