United Airlines
UA641Washington to Boston
United Airlines flight UA641 flies from Washington Dulles (IAD) to Boston (BOS), 664 km. Over August 2025 to July 2026 it usually arrives about 5 minutes early: 93% of 451 flights arrived within 15 minutes of schedule and 1.3% were cancelled (US Department of Transportation data).
On-time record, last 12 months
93%
on time (within 15 min)
4%
more than 30 min late
1.3%
cancelled
-5 min
average arrival vs schedule
Every operation of UA641, August 2025 to July 2026: 451 flights. Source: US Bureau of Transportation Statistics, public domain.
Routes flown as UA641
- Washington Dulles (IAD) to Boston (BOS)344 flights
- Atlanta (ATL) to Washington Dulles (IAD)104 flights
- Santa Ana (SNA) to Denver (DEN)3 flights
Other flights from Washington to Boston
More about Washington Dulles (IAD) and Boston (BOS).
Embed this on your site
A live badge for travel blogs, forums and trip reports. It updates as new data comes in, and links back here for the full stats.
Dark badge, HTML
<a href="https://tripstow.com/flights/ua641" title="UA641 is on time 93% of the time on TripStow"><img src="https://tripstow.com/badge/flights/ua641.svg" alt="UA641 is on time 93% of the time" width="360" height="88" loading="lazy"></a>
Light badge, HTML
<a href="https://tripstow.com/flights/ua641" title="UA641 is on time 93% of the time on TripStow"><img src="https://tripstow.com/badge/flights/ua641.svg?theme=light" alt="UA641 is on time 93% of the time" width="360" height="88" loading="lazy"></a>Markdown, for forums and README files
[](https://tripstow.com/flights/ua641)Flying soon?
Forward your booking to TripStow and get your trip built for you, with check-in reminders, punctuality for every flight and a map of everywhere you have been.
Start free