Live tracking not available yet
AC3400 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
SFO
San Francisco International Airport
San Francisco
T3 Scheduled 12:45 AM
ORD
Chicago O'Hare International Airport
Chicago
T1 Scheduled 7:07 AM
4h 22m flight time
Daily
Operated by United Airlines
Recent Flights
Last 12 observedMar 17
Tue
MIA
ORD
Dep 12:22:00
(actual 14:32:00)
739
Boarding
Mar 16
Mon
MIA
ORD
Dep 12:22:00
(actual 12:45:00)
739
Boarding
Mar 15
Sun
MIA
ORD
Dep 12:22:00
(actual 15:06:00)
739
In Air
Mar 14
Sat
MIA
ORD
Dep 12:22:00
(actual 12:25:00)
739
Boarding
Mar 13
Fri
MIA
ORD
Dep 12:22:00
(actual 13:54:00)
739
Boarding
Mar 12
Thu
MIA
ORD
Dep 12:22:00
(actual 12:21:00)
739
Boarding
Mar 11
Wed
MIA
ORD
Dep 12:22:00
(actual 12:27:00)
739
Boarding
Mar 10
Tue
MIA
ORD
Dep 12:22:00
(actual 12:27:00)
739
Boarding
Mar 09
Mon
MIA
ORD
Dep 12:22:00
(actual 12:26:00)
739
Boarding
Mar 08
Sun
MIA
ORD
Dep 12:22:00
(actual 12:04:00)
739
Boarding
Mar 07
Sat
MIA
ORD
Dep 12:22:00
(actual 12:27:00)
739
Boarding
Mar 06
Fri
MIA
ORD
Dep 12:22:00
(actual 15:50:00)
739
In Air
Schedule
Operates
Daily
Departure
12:45 AM
Arrival
7:07 AM
Duration
4h 22m
Aircraft
Airbus A321neo
Terminal
T3
T1
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 29 —
Apr 29, 2026