Dulles (IAD) to St Louis (STL) flights
GoJet Airlines flies nonstop from Washington Dulles International Airport to St. Louis Lambert International Airport, with about 13 flights a week in July 2026. The 696-mile flight takes about 2h 18m gate to gate.
- Distance
- 696 mi · 1,120 km
- Flight time
- 2h 18m
- Airlines
- 1
- Seats filled
- 77%
Airlines flying IAD to STL
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| GoJet Airlines | 13 | Bombardier CRJ550 | 27,101 | 2h 18m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
IAD to STL flight schedule
3 flight numbers flew this route in August 2026, 2 of them almost daily. The first usually leaves at 8:25am and the last at 5:45pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| UA 4427United Airlines · operated by GoJet Airlines | 8:25am | 9:39am | 21 | 83% |
| UA 4425United Airlines · operated by GoJet Airlines | 9:00am | 10:27am | 10 | 85% |
| UA 4527United Airlines · operated by GoJet Airlines | 5:45pm | 7:11pm | 31 | 71% |
Is IAD to STL on time?
From September 2025 to August 2026, 77% of 720 flights arrived within 15 minutes of schedule and 1.1% were cancelled. Flights leaving around 9am were the most punctual (86%), those around 5pm the least (71%). Most delay time was caused by late-arriving aircraft (50%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| United Airlines | 720 | 77% | 29 min | 1.1% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 8am to 9am | 216 | 81% | |
| 9am to 10am | 136 | 86% | |
| 5pm to 6pm | 344 | 71% | |
| 6pm to 7pm | 21 | 85% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 62 | 2,545 | |
| September 2025 | 58 | 2,397 | |
| October 2025 | 51 | 2,000 | |
| November 2025 | 60 | 2,295 | |
| December 2025 | 62 | 2,303 | |
| January 2026 | 59 | 2,077 | |
| February 2026 | 55 | 1,942 | |
| March 2026 | 62 | 2,297 | |
| April 2026 | 59 | 2,366 | |
| May 2026 | 61 | 2,267 | |
| June 2026 | 61 | 2,407 | |
| July 2026 | 59 | 2,369 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.