Is UA439 delayed?
Service date: · Scheduled departure date (America/Chicago)
Arrived
8 min late
Official source · Updated
Departure
Austin
AUS
Actual
Scheduled 18:15
Sep 7
Arrival
Denver
DEN
Actual
Scheduled 19:28
Sep 7
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
Arrival · UTC
- Scheduled
- Estimated
- Not available
- Actual
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 1 min early
AUS → DEN
- 5 min early
LAX → PHX
- 10 min late
LAX → PHX
- 4 min late
LAX → PHX
- 8 min late
AUS → DEN
Flight history and details
Aug 18, 2026 — Sep 17, 2026
- Observed arrivals
- 6
- Arrivals over 15 minutes late
- 0
- Observed cancellations
- 1
- Observed occurrences
- 7
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 | Austin | Denver | -1 | |
| Sep 15, 2026Arrived | Los Angeles | Phoenix | -5 | |
| Sep 14, 2026Cancelled | Austin | Denver | Not available | Not available |
| Sep 12, 2026Arrived | Los Angeles | Phoenix | 10 | |
| Sep 8, 2026Arrived | Los Angeles | Phoenix | 4 | |
| Sep 7, 2026Arrived | Austin | Denver | 8 | |
| Sep 4, 2026Arrived | Austin | Denver | -10 |