Air Canada
Is AC4285 delayed?
Service date: · Scheduled arrival date; departure time unavailable (America/Los_Angeles)
Arrived
2 min early
Official source · Updated
Departure
Ontario
ONT
Scheduled
Not available
Arrival
San Francisco
SFO
Actual
Scheduled 10:30
Sep 6
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Not available
- Estimated
- Not available
- Actual
- Not available
Arrival · UTC
- Scheduled
- Estimated
- Actual
Operating flight: UAL2052
ONTSFO
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 33 min late
ONT → SFO
- 20 min early
ONT → SFO
- 26 min early
ONT → SFO
- 39 min early
DEN → ORD
- 36 min early
DEN → ORD
Flight history and details
Aug 18, 2026 — Sep 17, 2026
- Observed arrivals
- 13
- Arrivals over 15 minutes late
- 2
- Observed cancellations
- 0
- Observed occurrences
- 13
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 | Ontario | San Francisco | 33 | |
| Sep 15, 2026Arrived | Ontario | San Francisco | -20 | |
| Sep 14, 2026Arrived | Ontario | San Francisco | -26 | |
| Sep 13, 2026Arrived | Denver | Chicago | -39 | |
| Sep 11, 2026Arrived | Denver | Chicago | -36 | |
| Sep 10, 2026Arrived | Ontario | San Francisco | 18 | |
| Sep 9, 2026Arrived | Ontario | San Francisco | -23 | |
| Sep 8, 2026Arrived | Ontario | San Francisco | -24 | |
| Sep 7, 2026Arrived | Ontario | San Francisco | -17 | |
| Sep 6, 2026Arrived | Ontario | San Francisco | -2 | |
| Sep 5, 2026Arrived | Denver | Chicago | -25 | |
| Sep 4, 2026Arrived | Ontario | San Francisco | -15 | |
| Sep 3, 2026Arrived | Denver | Chicago | -31 |