Is UA323 delayed?
Service date: · Scheduled departure date (America/New_York)
Arrived
10 min late
Official source · Updated
Departure
Boston
BOS
Actual
Scheduled 08:02
Sep 10
Arrival
San Francisco
SFO
Actual
Scheduled 11:07
Sep 10
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
Arrival · UTC
- Scheduled
- Estimated
- Actual
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 19 min early
BOS → SFO
- 2 min early
BOS → SFO
- 16 min late
BOS → SFO
- 7 min early
BOS → SFO
- 5 min early
BOS → SFO
Flight history and details
Aug 19, 2026 — Sep 18, 2026
- Observed arrivals
- 14
- Arrivals over 15 minutes late
- 2
- Observed cancellations
- 0
- Observed occurrences
- 14
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 18, 2026Arrived | Boston | San Francisco | -19 | |
| Sep 17, 2026Arrived | Boston | San Francisco | -2 | |
| Sep 16, 2026Arrived | Boston | San Francisco | 16 | |
| Sep 15, 2026Arrived | Boston | San Francisco | -7 | |
| Sep 13, 2026Arrived | Boston | San Francisco | -5 | |
| Sep 12, 2026Arrived | Boston | San Francisco | 13 | |
| Sep 11, 2026Arrived | Boston | San Francisco | 6 | |
| Sep 10, 2026Arrived | Boston | San Francisco | 10 | |
| Sep 9, 2026Arrived | Boston | San Francisco | -15 | |
| Sep 8, 2026Arrived | Boston | San Francisco | -16 | |
| Sep 7, 2026Arrived | Buffalo | Chicago | -33 | |
| Sep 6, 2026Arrived | Buffalo | Chicago | -31 | |
| Sep 5, 2026Arrived | Buffalo | Chicago | -40 | |
| Sep 4, 2026Arrived | Buffalo | Chicago | 58 |