Is UAL1263 delayed?
Service date: · Scheduled departure date (UTC)
Arrived
21 min early
Official source · Updated
Departure
Ontario
ONT
Actual
Sep 21
Arrival
Denver
DEN
Actual
Scheduled 16:33
Sep 21
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
Arrival · UTC
- Scheduled
- Estimated
- Not available
- Actual
ONTDEN
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 24 min early
ONT → DEN
- 21 min early
ONT → DEN
- 8 min late
ONT → DEN
- 13 min early
ONT → DEN
- 63 min late
ONT → DEN
Flight history and details
Aug 24, 2026 — Sep 23, 2026
- Observed arrivals
- 18
- Arrivals over 15 minutes late
- 1
- Observed cancellations
- 0
- Observed occurrences
- 19
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 22, 2026Arrived | Ontario | Denver | -24 | |
| Sep 21, 2026Arrived | Ontario | Denver | -21 | |
| Sep 20, 2026Arrived | Ontario | Denver | 8 | |
| Sep 19, 2026Arrived | Ontario | Denver | -13 | |
| Sep 18, 2026Arrived | Ontario | Denver | 63 | |
| Sep 17, 2026Arrived | Ontario | Denver | -12 | |
| Sep 16, 2026Arrived | Ontario | Denver | -8 | |
| Sep 15, 2026Arrived | Ontario | Denver | -15 | |
| Sep 14, 2026Arrived | Ontario | Denver | 9 | |
| Sep 12, 2026Arrived | Ontario | Denver | -9 | |
| Sep 11, 2026Arrived | Ontario | Denver | -14 | |
| Sep 10, 2026Arrived | Ontario | Denver | -11 | |
| Sep 9, 2026Arrived | Ontario | Denver | -4 | |
| Sep 8, 2026Arrived | Ontario | Denver | -12 | |
| Sep 7, 2026Arrived | Ontario | Denver | -28 | |
| Sep 6, 2026Arrived | Ontario | Denver | -14 | |
| Sep 5, 2026Arrived | Ontario | Denver | -24 | |
| Sep 4, 2026Arrived | Ontario | Denver | -13 |