Washington Dulles International Airport
Dulles, United StatesIAD / KIAD
International hub · 171 direct destinations · 4 runways · longest runway 11,499 ft
75 °F · ClearSource: METAR observation via the NOAA Aviation Weather Center
Route
Dulles → St. Louis
IAD
DullesWashington Dulles International Airport
DullesWashington Dulles International AirportSTLSt. LouisSt. Louis Lambert International Airport
St. LouisSt. Louis Lambert International Airport- Distance
- 695 mi
- Estimated flight time
- ~1h 55m
St. Louis is currently 1 hour behind Dulles.
Observed nonstop
How often does this route fly?
Frequency
A couple of times a day
On average around 2 flights a day, observed from October 2025 to September 2026.
- 2
- flights per day
- 2
- busiest month · Oct
- 1 hr 47 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 2Jan2026
- 2Feb
- 2Mar
- 2Apr
- 2May
- 2Jun
- 2Jul
- 2Aug
- 2Sep
- 2Oct2025
- 2Nov
- 2Dec
Airlines
Who flies it
GoJet Airlines LLCall year
Red Barn Operationswinter
Arizona Express Airlineswinter
Republic Airwaysnow and then
United Airlinesnow and then
Through the day
Departure times
Local time in Dulles. Most departures between 08:00 and 11:00.
- 00:00
- 01:00
- 02:00
- 03:00
- 04:00
- 05:00
- 06:00
- 07:00
- 08:00
- 09:00
- 10:00
- 11:00
- 12:00
- 13:00
- 14:00
- 15:00
- 16:00
- 17:00
- 18:00
- 19:00
- 20:00
- 21:00
- 22:00
- 23:00
Through the week
By weekday
- 1.9Mon
- 2.1Tue
- 1.9Wed
- 1.9Thu
- 2.1Fri
- 1.8Sat
- 1.9Sun
Fleet
Aircraft observed
- Bombardier CRJ700CRJ783%
- Embraer Phenom 300E55P3%
- Cessna Citation ExcelC56X2%
- Bombardier Challenger 600CL602%
- Cessna Citation LatitudeC68A1%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 2 | 50 |
|
| February 2026 | 2 | 55 |
|
| March 2026 | 2 | 62 |
|
| April 2026 | 2 | 61 |
|
| May 2026 | 2 | 57 |
|
| June 2026 | 2 | 67 |
|
| July 2026 | 2 | 60 |
|
| August 2026 | 2 | 61 |
|
| September 2026 | 2 | 59 |
|
| October 2025 | 2 | 55 |
|
| November 2025 | 2 | 58 |
|
| December 2025 | 2 | 56 |
|
Airlines observed on this route
From observed callsign routes on IAD-STL - not a booking guarantee.
About this route
- Domestic route: both airports are in the same country.
- The opposite direction has also been observed as a direct connection.
- Direct destinations observed from Dulles: 171.
- Direct destinations observed from St. Louis: 88.
The airports on this route
St. Louis Lambert International Airport
St. Louis, United StatesSTL / KSTL
Major airport · 88 direct destinations · 4 runways · longest runway 11,020 ft
56 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center
Alternative airports for this journey
Same journey, a different airport nearby - with an observed direct connection.
About the route from Dulles to St. Louis
The observed direct connection between Washington Dulles International Airport (IAD) and St. Louis Lambert International Airport (STL) covers approximately 695 mi. The estimated flight time is around 1h 55m. Arizona Express Airlines, GoJet Airlines LLC, Red Barn Operations, Republic Airways and United Airlines have been observed on this connection in the available route data.
Frequently asked questions about this route
- How far is Dulles from St. Louis by air?
- The great-circle distance between Washington Dulles International Airport and St. Louis Lambert International Airport is approximately 695 mi.
- How long is the flight from Dulles to St. Louis?
- Based on the distance, the estimated flight time is about 1h 55m. This is an estimate, not a schedule.
- Is there a direct connection from Dulles to St. Louis?
- Yes, a direct connection between IAD and STL has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: Arizona Express Airlines, GoJet Airlines LLC, Red Barn Operations, Republic Airways and United Airlines.
- How often is there a flight from Dulles to St. Louis?
- On average around 2 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 701 observed flights. Mainly GoJet Airlines LLC, Red Barn Operations, Arizona Express Airlines. That is an observation, not a timetable.
- What is the current time difference between Dulles and St. Louis?
- St. Louis is currently 1 hour behind Dulles.
Where this data comes from
The route data comes from the flight archive (ADS-B, adsb.lol): which connections actually flew over the last twelve full months and who flew them, combined with our own airport, runway, and airline datasets. It is reference data about observed routes - not a current timetable and no claim about bookability.
The frequency and aircraft on this page come from the flight archive (ADS-B, 12 months, October 2025 to September 2026), summarized per route per month. We do not see every flight, so it is a floor, not a count.
Route data updated on October 11, 2026.