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.

DCA
Ronald Reagan Washington National
🇺🇸 Washington, USA
STL
Saint Louis Airport
🇺🇸 Saint Louis, USA
Flight Time
2h 25m
Distance
719 mi
1,157 km
CO₂/pax
133 kg
−32 kg vs. layover
Airlines
2
American Airlines +1
Time Diff
-1h
Operated by American Airlines American Airlines Southwest Airlines Southwest Airlines

Route data last updated: May 30, 2026

Airlines with non-stop flights

American Airlines AA American Airlines
Route
DCA → STL
Flight Time
2h 25m
Distance
719 mi
Southwest Airlines WN Southwest Airlines
Route
DCA → STL
Flight Time
2h 25m
Distance
719 mi

Alternative Routes

Other ways to fly from Washington to Saint Louis with one stop · direct emits 133 kg CO₂ per passenger

DCA PIT (Pittsburgh) STL
Leg 1: 1h 14m (205 mi) Leg 2: 1h 45m (552 mi) Total: ~2h 59m 🍃 165 kg CO₂ (+24% vs. direct)
Leg 1
DCA → PIT
1h 14m · 205 mi
View DCA to PIT flights →
Leg 2
PIT → STL
1h 45m · 552 mi
View PIT to STL flights →
DCA IND (Indianapolis) STL
Leg 1: 2h (499 mi) Leg 2: 1h (229 mi) Total: ~3h 🍃 159 kg CO₂ (+20% vs. direct)
Leg 1
DCA → IND
2h · 499 mi
View DCA to IND flights →
Leg 2
IND → STL
1h · 229 mi
View IND to STL flights →
DCA CMH (Columbus) STL
Leg 1: 1h 34m (322 mi) Leg 2: 1h 30m (410 mi) Total: ~3h 4m 🍃 161 kg CO₂ (+21% vs. direct)
Leg 1
DCA → CMH
1h 34m · 322 mi
View DCA to CMH flights →
Leg 2
CMH → STL
1h 30m · 410 mi
View CMH to STL flights →
DCA CLE (Cleveland) STL
Leg 1: 1h 31m (309 mi) Leg 2: 1h 40m (488 mi) Total: ~3h 11m 🍃 172 kg CO₂ (+29% vs. direct)
Leg 1
DCA → CLE
1h 31m · 309 mi
View DCA to CLE flights →
Leg 2
CLE → STL
1h 40m · 488 mi
View CLE to STL flights →
DCA MDW (Chicago) STL
Leg 1: 2h (600 mi) Leg 2: 1h 15m (252 mi) Total: ~3h 15m 🍃 183 kg CO₂ (+38% vs. direct)
Leg 1
DCA → MDW
2h · 600 mi
View DCA to MDW flights →
Leg 2
MDW → STL
1h 15m · 252 mi
View MDW to STL flights →

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.