Is AA4439 delayed?
Service date: · Scheduled departure date (America/New_York)
Arrived
29 min late
Official source · Updated
Departure
Boston
BOS
Actual
Scheduled 20:21
Sep 8
Arrival
Buffalo
BUF
Actual
Scheduled 01:40
Sep 9
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
Arrival · UTC
- Scheduled
- Estimated
- Not available
- Actual
BOSBUF
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 6 min early
BOS → BUF
- 93 min late
BOS → BUF
- 36 min late
BOS → BUF
- 4 min late
BOS → BUF
- On time
BOS → BUF
Flight history and details
Aug 20, 2026 — Sep 19, 2026
- Observed arrivals
- 17
- Arrivals over 15 minutes late
- 10
- Observed cancellations
- 0
- 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 18, 2026Arrived | Boston | Buffalo | -6 | |
| Sep 17, 2026Arrived | Boston | Buffalo | 93 | |
| Sep 16, 2026Arrived | Boston | Buffalo | 36 | |
| Sep 15, 2026Arrived | Boston | Buffalo | 4 | |
| Sep 14, 2026Arrived | Boston | Buffalo | 0 | |
| Sep 11, 2026Arrived | Boston | Buffalo | 35 | |
| Sep 10, 2026Arrived | Boston | Buffalo | -9 | |
| Sep 9, 2026Arrived | Boston | Buffalo | 42 | |
| Sep 8, 2026Arrived | Boston | Buffalo | 29 | |
| Sep 7, 2026Arrived | Boston | Buffalo | -21 | |
| Sep 6, 2026Arrived | Boston | Buffalo | 104 | |
| Sep 5, 2026Arrived | Boston | Buffalo | 62 | |
| Sep 4, 2026Arrived | Boston | Buffalo | 47 | |
| Sep 3, 2026Arrived | Boston | Buffalo | 120 | |
| Sep 1, 2026Arrived | Boston | Buffalo | -28 | |
| Aug 28, 2026Arrived | Boston | Buffalo | -16 | |
| Aug 21, 2026Arrived | Boston | Buffalo | 21 |