United Airlines
Is UA3921 delayed?
No outcome was recorded for UA3921 on Sep 26; it was scheduled to reach Denver at 21:48 (as of Sep 30, 05:01 UTC). Over its last 6 recorded arrivals, 3 landed more than 15 min late.
No live update yet
Showing the published schedule until live times are reported.
Update time unavailable
Departure
Seattle
SEA
Scheduled
Sep 26
Arrival
Denver
DEN
Scheduled
Sep 26
Times shown in airport local time
Service date: · Scheduled departure date (America/Los_Angeles)
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.
- <1 min early
Houston → Dulles
- 15 min early
Columbus → Savannah
- 105 min late
KDJT → Houston
- 16 min late
Richmond → Houston
- On schedule (15 min behind)
Lihue → Honolulu
Is UA3921 usually late?
Observation window: Aug 31, 2026 – Sep 30, 2026
Percentages and delay figures appear once 10 arrivals are recorded.
On time means arriving no more than 15 minutes after the scheduled time; late means more than 15 minutes after. Cancelled and diverted flights are counted apart from arrivals. Results compare scheduled and actual arrival times. Cancelled or diverted flights are excluded. Some flights may be missing from the history.
At the airports today
Seattle (SEA) departures
- Left more than 15 min late
- 228 of 422
- Cancelled today
- 4
Denver (DEN) departures
- Left more than 15 min late
- 119 of 712
- Cancelled today
- 4
Related flights
Flight history and details
| Service date | Departure | Arrival | Actual | Arrival delay (minutes) |
|---|---|---|---|---|
| Sep 23, 2026Arrived | Houston | Dulles | 0 | |
| Sep 21, 2026Arrived | Columbus | Savannah | -15 | |
| Sep 19, 2026Arrived | KDJT | Houston | 105 | |
| Sep 16, 2026Arrived | Richmond | Houston | 16 | |
| Sep 8, 2026Arrived | Lihue | Honolulu | 15 | |
| Sep 7, 2026Arrived | Indianapolis | Chicago | 284 |
Email me if UA3921 runs late
We email you if your next UA3921 flight in the coming day is more than 15 minutes late, cancelled or diverted. Alerts last 30 days. No account needed.