Live tracking not available yet
AC521 has a schedule in our database but isn't on the airport board right now. Live position data typically appears within a few hours of departure.
Flight Status
Scheduled
Route Info
YUL
Montreal / Pierre Elliott Trudeau International Airport
Montréal
Gate C85 Scheduled 9:23 AM
Actual 10:15 AM
ORD
Chicago O'Hare International Airport
Chicago
T2 Gate E3 Scheduled 11:01 AM
Actual 11:44 AM
2h 38m flight time
Daily
Recent Flights
Last 2 observedMar 16
Mon
YUL
ORD
Dep 09:59:00
(actual 10:15:00)
223
Boarding
Mar 12
Thu
YUL
ORD
Dep 09:25:00
(actual 10:12:00)
223
Boarding
Schedule
Operates
Daily
Departure
9:23 AM
Arrival
11:01 AM
Duration
2h 38m
Aircraft
Airbus A220-300
Gate
C85
E3
Actual
10:15
11:44
Operating Days
Mo
Tu
We
Th
Fr
Sa
Su
Upcoming
Thu, Mar 19
Fri, Mar 20
Sat, Mar 21
Sun, Mar 22
Mon, Mar 23
Tue, Mar 24
Wed, Mar 25
Schedule valid
Mar 14 —
Apr 30, 2026