Is AC4557 delayed?
Service date: · Scheduled departure date (UTC)
Arrived
19 min early
Official source · Updated
Departure
Boise
BOI
Scheduled
Sep 6
Arrival
Chicago
ORD
Actual
Scheduled 13:15
Sep 6
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
- Not available
Arrival · UTC
- Scheduled
- Estimated
- Actual
Operating flight: UAL5386
BOIORD
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 55 min early
BOI → ORD
- 94 min late
BOI → ORD
- 25 min early
BOI → ORD
- 65 min early
BOI → ORD
- 59 min early
BOI → 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 | Boise | Chicago | -55 | |
| Sep 15, 2026Arrived | Boise | Chicago | 94 | |
| Sep 14, 2026Arrived | Boise | Chicago | -25 | |
| Sep 13, 2026Arrived | Boise | Chicago | -65 | |
| Sep 12, 2026Arrived | Boise | Chicago | -59 | |
| Sep 11, 2026Arrived | Boise | Chicago | -46 | |
| Sep 10, 2026Arrived | Boise | Chicago | -40 | |
| Sep 9, 2026Arrived | Boise | Chicago | -24 | |
| Sep 8, 2026Arrived | Boise | Chicago | -47 | |
| Sep 7, 2026Arrived | Boise | Chicago | -44 | |
| Sep 6, 2026Arrived | Boise | Chicago | -19 | |
| Sep 5, 2026Arrived | Boise | Chicago | 36 | |
| Sep 4, 2026Arrived | Boise | Chicago | -30 |