DL400: Delta flight 400
San Francisco (SFO) → Boston (BOS) · departs 7:00a, lands 3:45p local · Tue–Sat
The timetable below has every scheduled departure; for today's flight, check Delta.
An estimate from the published timetable, not live tracking: it cannot know about delays, diversions or cancellations.
Live status at Delta →The route
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DL400 timetable
Published departure and arrival times, each in its airport's local time, from the flights we sampled Oct 4–10.
| Route | Departs | Arrives | Scheduled | Days |
|---|---|---|---|---|
| SFO → BOSSan Francisco to Boston | 7:00a | 3:45p | 5h45m | Tue–Sat |
| SFO → BOSSan Francisco to Boston | 7:10a | 3:55p | 5h45m | Mon, Sun |
Other nonstops from San Francisco to Boston
The departures either side of DL400. Times are San Francisco time.
| Flight | Departs | Days |
|---|---|---|
| This flight DL400 | 7:00a | Tue–Sat |
| United UA371 | 7:00a | Mon, Thu, Fri, Sun |
| JetBlue | 7:50a | Mon, Wed, Thu, Fri, Sat, Sun |
| United UA2647 | 8:15a | Daily |
All 17 flights from SFO to BOS, by time →
Flying back from Boston
Delta flies Boston to San Francisco nonstop 25 times a week, from 7:45a to 8:51p: 7:45a DL977 · 10:05a DL860 · 5:02p DL1655 · every nonstop BOS → SFO →
How DL400 ran in our sample
5 of 7 departures left within 15 minutes of schedule (Oct 4–10). Only flights that departed are counted: cancellations are not in our data.
What time does DL400 leave San Francisco?
DL400 is scheduled to depart San Francisco (SFO) at 7:00a (Tue–Sat), 7:10a (Mon, Sun), San Francisco time, and to land in Boston (BOS) at about 3:45p local time, a scheduled 5h45m. Times are the published ones from the flights we sampled Oct 4–10; check Delta for today's.
Does DL400 fly every day?
Yes — DL400 flew San Francisco to Boston every day of the week we sampled (Oct 4–10).
Is DL400 usually on time?
Of 7 DL400 departures from SFO we sampled Oct 4–10, 5 left within 15 minutes of the scheduled time. That counts only flights that departed — cancellations are not in our data — and one week is a small sample, so treat it as a hint, not a rating.
More Delta flights from San Francisco
Timetable from Delta departures we observed; DL400 is a Delta Air Lines flight number, and Hop Nonstop is not affiliated with Delta. Schedules change — confirm with the airline before you travel.