Direct (nonstop) flights from Dulles to Saint Louis
1 airline flys nonstop from Washington Dulles International (IAD) to Saint Louis Airport (STL). It's 697 miles (1,121 km), about 2h 28m in the air. Operated by United Airlines.
United Airlines
Route data last updated: May 28, 2026
Airlines with non-stop flights
UA
United Airlines
Alternative Routes
Other ways to fly from Dulles to Saint Louis with one stop · direct emits 129 kg CO₂ per passenger
Looking for the return flight?
STL → IAD: Flights from Saint Louis to DullesOther direct flights from Dulles
Direct flights from Saint Louis (STL)
Frequently Asked Questions
How long is the direct flight from Dulles to Saint Louis?
A nonstop flight from Dulles (IAD) to Saint Louis (STL) takes approximately 2 hours and 28 minutes. The distance is 697 miles (1,121 km).
Which airlines fly nonstop from Dulles to Saint Louis?
Just United Airlines.
Is there a nonstop flight from Dulles to Saint Louis?
Yes. 1 airline: United Airlines.
How far is Dulles from Saint Louis?
The flight distance from Dulles to Saint Louis is 697 miles (1,121 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 Dulles to Saint Louis?
At 2h 28m, 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 Dulles to Saint Louis?
Roughly 129 kg CO2 per passenger one-way. That's about the same as driving 645 km.
Is the return flight from Saint Louis to Dulles 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 Dulles 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 Washington Dulles International for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.