Dulles (IAD) to Boston (BOS) flights
United Airlines, Republic Airline fly nonstop from Washington Dulles International Airport to Boston Logan International Airport, with about 37 flights a week in July 2026. The 412-mile flight takes about 1h 37m gate to gate.
- Distance
- 412 mi · 663 km
- Flight time
- 1h 37m
- Airlines
- 2
- Seats filled
- 87%
Airlines flying IAD to BOS
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| United Airlines | 27 | Boeing 737 MAX 9, Boeing 737-900ER, Boeing 737-800 | 217,330 | 1h 37m |
| Republic Airline | 10 | Embraer E175 | 3,294 | 1h 42m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
IAD to BOS flight schedule
6 flight numbers flew this route in August 2026, 4 of them almost daily. The first usually leaves at 8:35am and the last at 10:15pm. 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 641United Airlines | 8:35am | 10:18am | 31 | 92% |
| UA 3551United Airlines · operated by Republic Airline | 10:00am | 11:52am | 10 | 80% |
| UA 1392United Airlines | 1:05pm | 2:50pm | 31 | 80% |
| UA 3552United Airlines · operated by Republic Airline | 3:30pm | 5:24pm | 10 | 78% |
| UA 688United Airlines | 5:28pm | 7:19pm | 31 | 61% |
| UA 755United Airlines | 10:15pm | 11:59pm | 31 | 79% |
Is IAD to BOS on time?
From September 2025 to August 2026, 77% of 1,524 flights arrived within 15 minutes of schedule and 2.8% were cancelled. Flights leaving around 8am were the most punctual (93%), those around 5pm the least (61%). Most delay time was caused by air traffic control and airport congestion (63%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| United Airlines | 1,524 | 77% | 17 min | 2.8% |
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 | 233 | 93% | |
| 9am to 10am | 111 | 91% | |
| 10am to 11am | 37 | 83% | |
| 12pm to 1pm | 337 | 80% | |
| 3pm to 4pm | 59 | 38% | |
| 5pm to 6pm | 365 | 61% | |
| 10pm to 11pm | 354 | 80% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 134 | 21,393 | |
| September 2025 | 140 | 20,560 | |
| October 2025 | 124 | 19,113 | |
| November 2025 | 117 | 17,479 | |
| December 2025 | 124 | 17,701 | |
| January 2026 | 104 | 15,057 | |
| February 2026 | 97 | 13,369 | |
| March 2026 | 118 | 18,931 | |
| April 2026 | 120 | 17,970 | |
| May 2026 | 123 | 19,270 | |
| June 2026 | 117 | 18,503 | |
| July 2026 | 166 | 22,138 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.