Is UA439 delayed?
Service date: · Scheduled departure date (America/Chicago)
Last reported
Cancelled
This update may be out of date. Check with your airline.
Update time unavailable
Departure
Austin
AUS
Scheduled
Sep 14
Arrival
Denver
DEN
Scheduled
Sep 14
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
- Not available
Arrival · UTC
- Scheduled
- Estimated
- Not available
- Actual
- Not available
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 35 min late
AUS → DEN
- 11 min early
AUS → DEN
- 1 min early
AUS → DEN
- 5 min early
LAX → PHX
- 10 min late
LAX → PHX
Flight history and details
Aug 20, 2026 — Sep 19, 2026
- Observed arrivals
- 8
- Arrivals over 15 minutes late
- 1
- Observed cancellations
- 1
- Observed occurrences
- 9
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 | Austin | Denver | 35 | |
| Sep 17, 2026Arrived | Austin | Denver | -11 | |
| 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 |