Direct (nonstop) flights from Saint Louis to Dulles
1 airline flys nonstop from Saint Louis Airport (STL) to Washington Dulles International (IAD). It's 697 miles (1,121 km), about 2h 12m 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 Saint Louis to Dulles with one stop · direct emits 129 kg CO₂ per passenger
Looking for the return flight?
IAD → STL: Flights from Dulles to Saint LouisOther direct flights from Saint Louis
Direct flights from Dulles (IAD)
Frequently Asked Questions
How long is the direct flight from Saint Louis to Dulles?
A nonstop flight from Saint Louis (STL) to Dulles (IAD) takes approximately 2 hours and 12 minutes. The distance is 697 miles (1,121 km).
Which airlines fly nonstop from Saint Louis to Dulles?
Just United Airlines.
Is there a nonstop flight from Saint Louis to Dulles?
Yes. 1 airline: United Airlines.
How far is Saint Louis from Dulles?
The flight distance from Saint Louis to Dulles 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 Saint Louis to Dulles?
At 2h 12m, 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 Saint Louis to Dulles?
Roughly 129 kg CO2 per passenger one-way. That's about the same as driving 645 km.
Is the return flight from Dulles 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 Dulles?
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.