Boston (BOS) to Dulles (IAD) flights
United Airlines, Republic Airline fly nonstop from Boston Logan International Airport to Washington Dulles International Airport, with about 37 flights a week in July 2026. The 412-mile flight takes about 1h 40m gate to gate.
- Distance
- 412 mi · 663 km
- Flight time
- 1h 40m
- Airlines
- 2
- Seats filled
- 85%
Airlines flying BOS to IAD
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| United Airlines | 26 | Boeing 737-900ER, Boeing 737 MAX 9, Boeing 737-800 | 212,929 | 1h 40m |
| Republic Airline | 11 | Embraer E175 | 3,253 | 1h 52m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
BOS to IAD flight schedule
6 flight numbers flew this route in August 2026, 4 of them almost daily. The first usually leaves at 5:45am and the last at 7:23pm. 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 1734United Airlines | 5:45am | 7:20am | 31 | 96% |
| UA 2098United Airlines | 9:30am | 11:11am | 31 | 90% |
| UA 3413United Airlines · operated by Republic Airline | 12:35pm | 2:43pm | 10 | 89% |
| UA 721United Airlines | 2:28pm | 4:09pm | 31 | 77% |
| UA 3543United Airlines · operated by Republic Airline | 6:05pm | 8:20pm | 10 | 73% |
| UA 2136United Airlines | 7:23pm | 9:08pm | 31 | 70% |
Is BOS to IAD on time?
From September 2025 to August 2026, 83% of 1,527 flights arrived within 15 minutes of schedule and 3% were cancelled. Flights leaving around 5am were the most punctual (96%), those around 7pm the least (70%). Most delay time was caused by late-arriving aircraft (44%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| United Airlines | 1,527 | 83% | 15 min | 3% |
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 |
|---|---|---|---|
| 5am to 6am | 346 | 96% | |
| 9am to 10am | 365 | 90% | |
| 12pm to 1pm | 37 | 89% | |
| 2pm to 3pm | 364 | 77% | |
| 6pm to 7pm | 37 | 73% | |
| 7pm to 8pm | 354 | 70% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 133 | 20,632 | |
| September 2025 | 141 | 19,834 | |
| October 2025 | 123 | 19,595 | |
| November 2025 | 121 | 17,980 | |
| December 2025 | 122 | 18,553 | |
| January 2026 | 103 | 13,539 | |
| February 2026 | 98 | 13,513 | |
| March 2026 | 118 | 16,646 | |
| April 2026 | 120 | 18,105 | |
| May 2026 | 123 | 18,751 | |
| June 2026 | 122 | 18,711 | |
| July 2026 | 165 | 21,272 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.