Is AC4185 delayed?
Service date: · Scheduled departure date (America/Los_Angeles)
Arrived
36 min early
Official source · Updated
Departure
San Francisco
SFO
Actual
Scheduled 15:10
Sep 13
Arrival
Chicago
ORD
Actual
Scheduled 21:45
Sep 13
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
Arrival · UTC
- Scheduled
- Estimated
- Actual
Operating flight: UAL1147
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 45 min early
SFO → ORD
- 26 min early
SFO → ORD
- 36 min early
SFO → ORD
- 50 min early
SFO → ORD
- 37 min early
SFO → ORD
Flight history and details
Aug 17, 2026 — Sep 16, 2026
- Observed arrivals
- 12
- Arrivals over 15 minutes late
- 0
- Observed cancellations
- 0
- Observed occurrences
- 12
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 15, 2026Arrived | San Francisco | Chicago | -45 | |
| Sep 14, 2026Arrived | San Francisco | Chicago | -26 | |
| Sep 13, 2026Arrived | San Francisco | Chicago | -36 | |
| Sep 12, 2026Arrived | San Francisco | Chicago | -50 | |
| Sep 11, 2026Arrived | San Francisco | Chicago | -37 | |
| Sep 10, 2026Arrived | San Francisco | Chicago | 12 | |
| Sep 9, 2026Arrived | San Francisco | Chicago | -33 | |
| Sep 8, 2026Arrived | San Francisco | Chicago | -37 | |
| Sep 7, 2026Arrived | San Francisco | Chicago | -32 | |
| Sep 6, 2026Arrived | San Francisco | Chicago | -8 | |
| Sep 4, 2026Arrived | San Francisco | Chicago | -26 | |
| Sep 3, 2026Arrived | San Francisco | Chicago | -15 |