Direct (nonstop) flights from Washington to Saint Louis
2 airlines fly nonstop from Ronald Reagan Washington National (DCA) to Saint Louis Airport (STL). It's 719 miles (1,157 km), about 2h 25m 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 Washington to Saint Louis with one stop · direct emits 133 kg CO₂ per passenger
Looking for the return flight?
STL → DCA: Flights from Saint Louis to WashingtonOther direct flights from Washington
Direct flights from Saint Louis (STL)
Frequently Asked Questions
How long is the direct flight from Washington to Saint Louis?
A nonstop flight from Washington (DCA) to Saint Louis (STL) takes approximately 2 hours and 25 minutes. The distance is 719 miles (1,157 km).
Which airlines fly nonstop from Washington to Saint Louis?
2 airlines: American Airlines, Southwest Airlines.
Is there a nonstop flight from Washington to Saint Louis?
Yes. 2 airlines: American Airlines, Southwest Airlines.
How far is Washington from Saint Louis?
The flight distance from Washington to Saint Louis 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 Washington to Saint Louis?
At 2h 25m, this route typically uses narrow-body or mid-range jets — Boeing 737 MAX or Airbus A320neo. Varies by airline.
What is the carbon footprint of a flight from Washington to Saint Louis?
Roughly 133 kg CO2 per passenger one-way. That's about the same as driving 665 km.
Is the return flight from Saint Louis to Washington 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 Washington to Saint Louis?
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 Ronald Reagan Washington National for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.