United Airlines
Is UAL8278 delayed?
No — UAL8278 landed in Ontario on schedule (5 min behind), at 20:03 on Sep 21 (as of Sep 22, 03:03 UTC). Over its last 3 recorded arrivals, 1 landed more than 15 min late.
Arrived
On schedule (5 min behind)
Official source · Updated
Departure
San Francisco
SFO
Scheduled
Sep 21
Arrival
Ontario
ONT
Actual
Scheduled 19:58
Sep 21
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
SFOONT
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- On schedule (5 min behind)
San Francisco → Ontario
- On schedule (13 min behind)
San Francisco → Ontario
- 61 min late
San Francisco → Ontario
Flight history and details
Aug 29, 2026 — Sep 28, 2026
- Observed arrivals
- 3
- Arrivals over 15 minutes late
- 1
- Observed cancellations
- 0
- Observed occurrences
- 3
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 21, 2026Arrived | San Francisco | Ontario | 5 | |
| Sep 20, 2026Arrived | San Francisco | Ontario | 13 | |
| Sep 17, 2026Arrived | San Francisco | Ontario | 61 |