San Diego (SAN) to Dulles (IAD) flights
United Airlines, Alaska Airlines fly nonstop from San Diego International Airport to Washington Dulles International Airport, with about 28 flights a week in July 2026. The 2,253-mile flight takes about 4h 51m gate to gate.
- Distance
- 2,253 mi · 3,626 km
- Flight time
- 4h 51m
- Airlines
- 2
- Seats filled
- 86%
Airlines flying SAN to IAD
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| United Airlines | 21 | Boeing 737-900ER, Boeing 737 MAX 9, Boeing 737-800 | 160,783 | 4h 50m |
| Alaska Airlines | 8 | Boeing 737-900ER, Boeing 737 MAX 9, Boeing 737-800 | 52,527 | 4h 54m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
SAN to IAD flight schedule
4 flight numbers flew this route in August 2026, 4 of them almost daily. The first usually leaves at 8:00am and the last at 9:45pm. 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 1071United Airlines | 8:00am | 4:02pm | 31 | 89% |
| AS 506Alaska Airlines | 10:34am | 6:45pm | 31 | 83% |
| UA 444United Airlines | 12:40pm | 8:42pm | 31 | 84% |
| UA 2129United Airlines | 9:45pm | 5:41am | 31 | 87% |
Is SAN to IAD on time?
From September 2025 to August 2026, 88% of 1,402 flights arrived within 15 minutes of schedule and 0.8% were cancelled. Flights leaving around 10pm were the most punctual (90%), those around 10am the least (72%). Most delay time was caused by the airline (crew, maintenance, cleaning, fuelling) (39%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| United Airlines | 1,041 | 88% | 10 min | 0.8% |
| Alaska Airlines | 361 | 86% | 8 min | 0.8% |
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 | 390 | 90% | |
| 9am to 10am | 222 | 89% | |
| 10am to 11am | 83 | 72% | |
| 12pm to 1pm | 293 | 86% | |
| 1pm to 2pm | 70 | 97% | |
| 9pm to 10pm | 199 | 85% | |
| 10pm to 11pm | 127 | 90% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 122 | 19,570 | |
| September 2025 | 117 | 17,007 | |
| October 2025 | 119 | 17,430 | |
| November 2025 | 115 | 17,132 | |
| December 2025 | 122 | 17,922 | |
| January 2026 | 108 | 14,464 | |
| February 2026 | 99 | 14,301 | |
| March 2026 | 113 | 18,085 | |
| April 2026 | 111 | 18,403 | |
| May 2026 | 119 | 18,436 | |
| June 2026 | 123 | 20,692 | |
| July 2026 | 126 | 20,236 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.