San Juan (SJU) to Dulles (IAD) flights
United Airlines flies nonstop from Luis Munoz Marin International Airport to Washington Dulles International Airport, with about 14 flights a week in July 2026. The 1,572-mile flight takes about 3h 57m gate to gate.
- Distance
- 1,572 mi · 2,530 km
- Flight time
- 3h 57m
- Airlines
- 1
- Seats filled
- 89%
Airlines flying SJU to IAD
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| United Airlines | 14 | Boeing 737 MAX 9, Boeing 737-900ER, Boeing 737 MAX 8 | 103,011 | 3h 55m |
| Frontier AirlinesSeasonal or ended | n/a | Airbus A321, Airbus A320neo, Airbus A320-100/200 | 11,790 | 4h 10m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
SJU to IAD flight schedule
2 flight numbers flew this route in August 2026, 1 of them almost daily. The first usually leaves at 7:20am and the last at 4:55pm. 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 2022United Airlines | 7:20am | 11:21am | 11 | 96% |
| UA 2024United Airlines | 4:55pm | 8:47pm | 31 | 88% |
Is SJU to IAD on time?
From September 2025 to August 2026, 89% of 698 flights arrived within 15 minutes of schedule and 0.7% were cancelled. Flights leaving around 7am were the most punctual (96%), those around 4pm the least (82%). Most delay time was caused by late-arriving aircraft (51%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| United Airlines | 636 | 92% | 5 min | 0.6% |
| Frontier Airlines | 62 | 59% | 45 min | 1.6% |
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 |
|---|---|---|---|
| 7am to 8am | 165 | 96% | |
| 8am to 9am | 125 | 96% | |
| 3pm to 4pm | 14 | 79% | |
| 4pm to 5pm | 258 | 82% | |
| 5pm to 6pm | 126 | 87% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 50 | 8,537 | |
| September 2025 | 14 | 2,332 | |
| October 2025 | 43 | 6,283 | |
| November 2025 | 73 | 11,365 | |
| December 2025 | 78 | 11,319 | |
| January 2026 | 71 | 12,082 | |
| February 2026 | 64 | 10,777 | |
| March 2026 | 67 | 11,105 | |
| April 2026 | 63 | 9,972 | |
| May 2026 | 62 | 10,313 | |
| June 2026 | 60 | 10,017 | |
| July 2026 | 64 | 10,829 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.