Is AC521 delayed?
Service date: · Scheduled departure date (UTC)
Arrived
127 min late
Official source · Updated
Departure
Montreal
YUL
Actual
Scheduled 12:40
Sep 17
Arrival
Chicago
ORD
Actual
Scheduled 10:15
Sep 17
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
Arrival · UTC
- Scheduled
- Estimated
- Actual
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YULORD
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 127 min late
YUL → ORD
- 13 min early
YUL → ORD
- 57 min late
YUL → ORD
- 17 min early
YUL → ORD
- 22 min early
YUL → ORD
Flight history and details
Aug 19, 2026 — Sep 18, 2026
- Observed arrivals
- 11
- Arrivals over 15 minutes late
- 3
- Observed cancellations
- 0
- Observed occurrences
- 11
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 17, 2026Arrived | Montreal | Chicago | 127 | |
| Sep 16, 2026Arrived | Montreal | Chicago | -13 | |
| Sep 15, 2026Arrived | Montreal | Chicago | 57 | |
| Sep 14, 2026Arrived | Montreal | Chicago | -17 | |
| Sep 13, 2026Arrived | Montreal | Chicago | -22 | |
| Sep 12, 2026Arrived | Montreal | Chicago | 9 | |
| Sep 11, 2026Arrived | Montreal | Chicago | -28 | |
| Sep 10, 2026Arrived | Montreal | Chicago | 18 | |
| Sep 9, 2026Arrived | Montreal | Chicago | -11 | |
| Sep 8, 2026Arrived | Montreal | Chicago | -19 | |
| Sep 7, 2026Arrived | Montreal | Chicago | -36 |