United Airlines
UA721Boston to Washington
United Airlines flight UA721 flies from Boston (BOS) to Washington Dulles (IAD), 664 km. Over August 2025 to July 2026 it usually arrives about 15 minutes late: 77% of 383 flights arrived within 15 minutes of schedule and 2.6% were cancelled (US Department of Transportation data).
On-time record, last 12 months
77%
on time (within 15 min)
15%
more than 30 min late
2.6%
cancelled
+15 min
average arrival vs schedule
Every operation of UA721, August 2025 to July 2026: 383 flights. Source: US Bureau of Transportation Statistics, public domain.
Routes flown as UA721
- Boston (BOS) to Washington Dulles (IAD)347 flights
- Washington Dulles (IAD) to Las Vegas (LAS)18 flights
- Chicago O'Hare (ORD) to Boston (BOS)15 flights
- Jacksn Hole (JAC) to San Francisco (SFO)3 flights
Other flights from Boston to Washington
More about Boston (BOS) and Washington Dulles (IAD).
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