Is UA323 delayed?
Service date: · Scheduled departure date (UTC)
Arrived
33 min early
Official source · Updated
Departure
Buffalo
BUF
Actual
Scheduled 14:30
Sep 7
Arrival
Chicago
ORD
Actual
Scheduled 11:29
Sep 7
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
Arrival · UTC
- Scheduled
- Estimated
- Actual
BUFORD
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 7 min early
BOS → SFO
- 5 min early
BOS → SFO
- 13 min late
BOS → SFO
- 6 min late
BOS → SFO
- 10 min late
BOS → SFO
Flight history and details
Aug 17, 2026 — Sep 16, 2026
- Observed arrivals
- 11
- Arrivals over 15 minutes late
- 1
- Observed cancellations
- 0
- Observed occurrences
- 12
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 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 |