United Airlines
Is UA3900 delayed?
UA3900 is listed as cancelled on Sep 30. Over its last 6 recorded arrivals, 2 landed more than 15 min late.
Cancelled
This update may be out of date. Check with your airline.
Update time unavailable
Departure
Newark
EWR
Scheduled
Sep 30
Arrival
Chicago
ORD
Estimated
Scheduled 18:47
Sep 30
Times shown in airport local time
Service date: · Scheduled departure date (America/New_York)
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
- Not available
Arrival · UTC
- Scheduled
- Estimated
- Actual
- Not available
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 88 min late
San Francisco → Sacramento
- 10 min early
Omaha → Denver
- 7 min early
Los Angeles → San Francisco
- 25 min late
Chicago → Los Angeles
- On schedule (5 min behind)
San Francisco → Los Angeles
Is UA3900 usually late?
Observation window: Sep 1, 2026 – Oct 1, 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
Newark (EWR) departures
- Left more than 15 min late
- 11 of 63
- Cancelled today
- 4
Chicago (ORD) departures
- Left more than 15 min late
- 143 of 171
- Cancelled today
- 5
Related flights
Flight history and details
| Service date | Departure | Arrival | Actual | Arrival delay (minutes) |
|---|---|---|---|---|
| Sep 30, 2026Cancelled | Newark | Chicago | Not available | Not available |
| Sep 24, 2026Arrived | San Francisco | Sacramento | 88 | |
| Sep 22, 2026Arrived | Omaha | Denver | -10 | |
| Sep 21, 2026Cancelled | Dulles | Houston | Not available | Not available |
| Sep 19, 2026Arrived | Los Angeles | San Francisco | -7 | |
| Sep 18, 2026Arrived | Chicago | Los Angeles | 25 | |
| Sep 13, 2026Cancelled | Dublin | Newark | Not available | Not available |
| Sep 10, 2026Arrived | San Francisco | Los Angeles | 5 | |
| Sep 7, 2026Cancelled | Zurich | Newark | Not available | Not available |
| Sep 6, 2026Arrived | San Francisco | Honolulu | -51 |
Email me if UA3900 runs late
We email you if your next UA3900 flight in the coming day is more than 15 minutes late, cancelled or diverted. Alerts last 30 days. No account needed.