Is UA1515 delayed?
Service date: · Scheduled departure date (America/Denver)
Arrived
28 min late
Updated
Departure
Denver
DEN
Actual
Scheduled 19:15
Aug 31
Arrival
Great Falls
GTF
Actual
Scheduled 03:12
Sep 1
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Actual
Arrival · UTC
- Scheduled
- Estimated
- Actual
DENGTF
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 109 min late
DEN → GTF
- 38 min late
DEN → GTF
- 13 min late
DEN → GTF
- 31 min late
DEN → GTF
- On time
DEN → GTF
Flight history and details
Aug 21, 2026 — Sep 20, 2026
- Observed arrivals
- 19
- Arrivals over 15 minutes late
- 7
- Observed cancellations
- 0
- Observed occurrences
- 30
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 19, 2026Arrived | Denver | Great Falls | 109 | |
| Sep 18, 2026Arrived | Denver | Great Falls | 38 | |
| Sep 17, 2026Arrived | Denver | Great Falls | 13 | |
| Sep 16, 2026Arrived | Denver | Great Falls | 31 | |
| Sep 15, 2026Arrived | Denver | Great Falls | 0 | |
| Sep 14, 2026Arrived | Denver | Great Falls | 0 | |
| Sep 13, 2026Arrived | Denver | Great Falls | 6 | |
| Sep 12, 2026Arrived | Denver | Great Falls | 5 | |
| Sep 11, 2026Arrived | Denver | Great Falls | 33 | |
| Sep 10, 2026Arrived | Denver | Great Falls | 6 | |
| Sep 9, 2026Arrived | Denver | Great Falls | -3 | |
| Sep 8, 2026Arrived | Denver | Great Falls | 36 | |
| Sep 7, 2026Arrived | Denver | Great Falls | 1 | |
| Sep 6, 2026Arrived | Denver | Great Falls | 39 | |
| Sep 5, 2026Arrived | Denver | Great Falls | -22 | |
| Sep 4, 2026Arrived | Denver | Great Falls | 5 | |
| Sep 3, 2026Arrived | Denver | Great Falls | -9 | |
| Sep 1, 2026Arrived | Denver | Great Falls | -23 | |
| Aug 31, 2026Arrived | Denver | Great Falls | 28 |