Direct (nonstop) flights from Saint Louis to Washington
2 airlines fly nonstop from Saint Louis Airport (STL) to Ronald Reagan Washington National (DCA). It's 719 miles (1,157 km), about 2h in the air. Operated by American Airlines, Southwest Airlines.
American Airlines
Southwest Airlines
Route data last updated: May 30, 2026
Airlines with non-stop flights
AA
American Airlines
WN
Southwest Airlines
Alternative Routes
Other ways to fly from Saint Louis to Washington with one stop · direct emits 133 kg CO₂ per passenger
Looking for the return flight?
DCA → STL: Flights from Washington to Saint LouisOther direct flights from Saint Louis
Direct flights from Washington (DCA)
Frequently Asked Questions
How long is the direct flight from Saint Louis to Washington?
A nonstop flight from Saint Louis (STL) to Washington (DCA) takes approximately 2 hours. The distance is 719 miles (1,157 km).
Which airlines fly nonstop from Saint Louis to Washington?
2 airlines: American Airlines, Southwest Airlines.
Is there a nonstop flight from Saint Louis to Washington?
Yes. 2 airlines: American Airlines, Southwest Airlines.
How far is Saint Louis from Washington?
The flight distance from Saint Louis to Washington is 719 miles (1,157 km), measured as the great-circle (shortest air) distance. That's roughly the same distance as the length of Italy.
What type of aircraft flies from Saint Louis to Washington?
At 2h, this route typically uses narrow-body aircraft — Boeing 737 or Airbus A320. Varies by airline.
What is the carbon footprint of a flight from Saint Louis to Washington?
Roughly 133 kg CO2 per passenger one-way. That's about the same as driving 665 km.
Is the return flight from Washington to Saint Louis also nonstop?
Yes — nonstop flights run both ways. Flight time may differ slightly due to wind patterns.
When is the cheapest time to fly from Saint Louis to Washington?
Midweek flights (Tue/Wed) outside holiday peaks are usually cheapest. 3-6 weeks ahead is a good window for this route. Use "Check Prices" above to compare.
How early should I arrive at Saint Louis Airport for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.