San Francisco (SFO) to Dulles (IAD) flights
United Airlines flies nonstop from San Francisco International Airport to Washington Dulles International Airport, with about 49 flights a week in July 2026. The 2,418-mile flight takes about 5h 3m gate to gate.
- Distance
- 2,418 mi · 3,891 km
- Flight time
- 5h 3m
- Airlines
- 1
- Seats filled
- 87%
Airlines flying SFO to IAD
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| United Airlines | 49 | Boeing 737 MAX 9, Boeing 737-900ER, Boeing 757-300 | 485,748 | 5h 3m |
| Alaska AirlinesSeasonal or ended | n/a | Boeing 737 MAX 9, Boeing 737-900ER | 5,919 | 5h 15m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
SFO to IAD flight schedule
11 flight numbers flew this route in August 2026, 5 of them almost daily. The first usually leaves at 8:10am and the last at 11:14pm. 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 1849United Airlines | 8:10am | 4:25pm | 10 | 84% |
| UA 599United Airlines | 8:10am | 4:18pm | 21 | 76% |
| UA 336United Airlines | 10:46am | 7:05pm | 31 | 75% |
| UA 755United Airlines | 1:15pm | 9:22pm | 21 | 69% |
| UA 1791United Airlines | 2:00pm | 10:19pm | 28 | 69% |
| UA 1453United Airlines | 4:34pm | 12:55am | 19 | 86% |
| UA 357United Airlines | 9:30pm | 5:53am | 10 | 70% |
| UA 705United Airlines | 9:30pm | 5:55am | 18 | 100% |
| UA 2837United Airlines | 10:35pm | 7:00am | 31 | 70% |
| UA 1083United Airlines | 11:05pm | 7:30am | 7 | 80% |
| UA 2111United Airlines | 11:14pm | 7:35am | 18 | 88% |
Is SFO to IAD on time?
From September 2025 to August 2026, 83% of 2,690 flights arrived within 15 minutes of schedule and 0.6% were cancelled. Flights leaving around 9pm were the most punctual (88%), those around 10am the least (75%). Most delay time was caused by late-arriving aircraft (42%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| United Airlines | 2,690 | 83% | 11 min | 0.6% |
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 |
|---|---|---|---|
| 6am to 7am | 125 | 98% | |
| 8am to 9am | 365 | 84% | |
| 10am to 11am | 211 | 75% | |
| 11am to 12pm | 154 | 82% | |
| 12pm to 1pm | 175 | 76% | |
| 1pm to 2pm | 247 | 76% | |
| 4pm to 5pm | 298 | 86% | |
| 9pm to 10pm | 361 | 88% | |
| 10pm to 11pm | 366 | 81% | |
| 11pm to 12am | 325 | 86% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 254 | 49,061 | |
| September 2025 | 207 | 38,665 | |
| October 2025 | 248 | 45,952 | |
| November 2025 | 228 | 43,025 | |
| December 2025 | 245 | 41,499 | |
| January 2026 | 201 | 31,109 | |
| February 2026 | 190 | 29,539 | |
| March 2026 | 210 | 38,062 | |
| April 2026 | 231 | 40,555 | |
| May 2026 | 268 | 45,727 | |
| June 2026 | 235 | 44,703 | |
| July 2026 | 216 | 43,770 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.