Is DL400 delayed?
Service date: · Scheduled departure date (America/Los_Angeles)
Arrived
23 min early
Official source · Updated
Departure
San Francisco
SFO
Actual
Scheduled 07:00
Sep 5
Arrival
Boston
BOS
Actual
Scheduled 15:45
Sep 5
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
Arrival · UTC
- Scheduled
- Estimated
- Not available
- Actual
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 19 min early
SFO → BOS
- 26 min early
SFO → BOS
- 1 min late
SFO → BOS
- 9 min early
SFO → BOS
- 1 min early
SFO → BOS
Flight history and details
Aug 18, 2026 — Sep 17, 2026
- Observed arrivals
- 9
- Arrivals over 15 minutes late
- 0
- Observed cancellations
- 1
- Observed occurrences
- 28
Results compare scheduled and actual arrival times. Cancelled or diverted flights are excluded. Some flights may be missing from the history.
| Service date | Departure | Arrival | Actual | Arrival delay (minutes) |
|---|---|---|---|---|
| Sep 16, 2026Arrived | San Francisco | Boston | -19 | |
| Sep 15, 2026Arrived | San Francisco | Boston | -26 | |
| Sep 11, 2026Arrived | San Francisco | Boston | 1 | |
| Sep 10, 2026Cancelled | San Francisco | Boston | Not available | Not available |
| Sep 9, 2026Arrived | San Francisco | Boston | -9 | |
| Sep 7, 2026Arrived | San Francisco | Boston | -1 | |
| Sep 6, 2026Arrived | San Francisco | Boston | -40 | |
| Sep 5, 2026Arrived | San Francisco | Boston | -23 | |
| Sep 4, 2026Arrived | San Francisco | Boston | -13 | |
| Sep 2, 2026Arrived | San Francisco | Boston | -39 |