United Airlines
Is UA9721 delayed?
Service date: · Scheduled arrival date; departure time unavailable (Europe/Zurich)
Arrived
22 min late
Official source · Updated
Departure
Boston
BOS
Scheduled
Not available
Arrival
Zurich
ZRH
Actual
Scheduled 10:55
Sep 16
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Not available
- Estimated
- Not available
- Actual
- Not available
Arrival · UTC
- Scheduled
- Estimated
- Actual
Operating flight: SWR53
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 22 min late
BOS → ZRH
- 2 min late
BOS → ZRH
- 16 min late
BOS → ZRH
- 19 min late
BOS → ZRH
- 17 min early
BOS → ZRH
Flight history and details
Aug 17, 2026 — Sep 16, 2026
- Observed arrivals
- 11
- Arrivals over 15 minutes late
- 5
- Observed cancellations
- 0
- Observed occurrences
- 11
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 | Boston | Zurich | 22 | |
| Sep 15, 2026Arrived | Boston | Zurich | 2 | |
| Sep 14, 2026Arrived | Boston | Zurich | 16 | |
| Sep 13, 2026Arrived | Boston | Zurich | 19 | |
| Sep 12, 2026Arrived | Boston | Zurich | -17 | |
| Sep 11, 2026Arrived | Boston | Zurich | 12 | |
| Sep 9, 2026Arrived | Boston | Zurich | 3 | |
| Sep 7, 2026Arrived | Boston | Zurich | -20 | |
| Sep 6, 2026Arrived | Boston | Zurich | 6 | |
| Sep 5, 2026Arrived | Boston | Zurich | 17 | |
| Sep 4, 2026Arrived | Boston | Zurich | 22 |