Delta Air Lines
DL400San Francisco to Boston
Delta Air Lines flight DL400 flies from San Francisco (SFO) to Boston (BOS), 4,341 km. Over August 2025 to July 2026 it usually arrives right on schedule: 89% of 364 flights arrived within 15 minutes of schedule and 1.6% were cancelled (US Department of Transportation data).
On-time record, last 12 months
89%
on time (within 15 min)
5%
more than 30 min late
1.6%
cancelled
-1 min
average arrival vs schedule
Every operation of DL400, August 2025 to July 2026: 364 flights. Source: US Bureau of Transportation Statistics, public domain.
Routes flown as DL400
- San Francisco (SFO) to Boston (BOS)364 flights
Other flights from San Francisco to Boston
More about San Francisco (SFO) 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/dl400" title="DL400 is on time 89% of the time on TripStow"><img src="https://tripstow.com/badge/flights/dl400.svg" alt="DL400 is on time 89% of the time" width="360" height="88" loading="lazy"></a>
Light badge, HTML
<a href="https://tripstow.com/flights/dl400" title="DL400 is on time 89% of the time on TripStow"><img src="https://tripstow.com/badge/flights/dl400.svg?theme=light" alt="DL400 is on time 89% of the time" width="360" height="88" loading="lazy"></a>Markdown, for forums and README files
[](https://tripstow.com/flights/dl400)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