United Airlines UA503 Flight Status
According to Trip.com real-time data, the UA503 flight operated by United Airlines on Mar 11, 2026 is scheduled to fly from Boston (BOS) to Chicago (ORD). The flight is expected to depart at 11:02 AM (local time in Boston, UTC-5) and land at 12:22 PM (local time in Chicago, UTC-6) .
Tue, Mar 10
Wed, Mar 11
Thu, Mar 12
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Arrived
The flight has arrived 35m early
3h 5m
Check-in Counter
--
Boarding Gate
B27
Arrival Gate
C11
Baggage
5
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Scheduled
Your flight will depart on time.
3h 5m
Check-in Counter
--
Boarding Gate
B31
Arrival Gate
C29
Baggage
5
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Scheduled
Your flight will depart on time.
3h 5m
Check-in Counter
--
Boarding Gate
--
Arrival Gate
--
Baggage
--
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Information provided by VariFlightVariFlight. For real-time updates, please check airport displays or contact your airline. If this is not your flight, you can browse more options for flights from Boston to Chicago to find your schedule.
Track the Previous Flight Status: Scheduled
UA641
|
Washington D.C. (WAS) 
Boston (BOS)
Boston (BOS)Scheduled: 9:56 AM
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UA503 Aircraft Details
According to Trip.com real-time data, the UA503 flight flying from Boston to Chicago on 3/11/2026 is operated by the aircraft model Boeing 737-900. This aircraft has been in service for 1y. The aircraft is equipped with Up to 191 seats.
Boeing 737-900
Punctuality (Departure)
80%
Punctuality (Arrival)
80%
Late on average
39 minutes
Age
1y
Seats
Up to 191
Flight Distance
--
Economy
First
Premium Economy
In-Flight Services
None
On-demand entertainment
Wi-Fi (additional charge)
Power outlet
Seat Information
79 cm
More legroom than on 53% of flights
--
Seat width
105°
Reclining Angle
3-3
Seat layout example
In-Flight Services
Snacks
On-demand entertainment
Wi-Fi (additional charge)
Power outlet
Seat Information
97 cm
More legroom than on 70% of flights
51 cm
Seat width better than on 30% of flights
145°
Reclining Angle
2-2
Seat layout example
In-Flight Services
None
On-demand entertainment
Wi-Fi (additional charge)
Power outlet
Seat Information
89 cm
More legroom than on 80% of flights
43 cm
Seat width better than on 5% of flights
120°
Reclining Angle
3-3
Seat layout example
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Flight History for UA503
Trip.com historical records show that the last UA503 flight departed on Tue, Mar 10 from BOS at approximately 11:12 AM. This flight is expected to arrrive in ORD at 12:32 PM.
| Date | Airport | Aircraft Model | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Departure | Arrival | |||||
| Fri, Mar 6 | Boston (BOS) | Chicago (ORD) | B39M | 4:52 PM | 6:24 PM | Arrived |
| Sat, Mar 7 | Boston (BOS) | Chicago (ORD) | B39M | 11:15 AM | 12:36 PM | Arrived |
| Sun, Mar 8 | Boston (BOS) | Chicago (ORD) | B39M | 11:24 AM | 12:47 PM | Arrived |
| Mon, Mar 9 | Boston (BOS) | Chicago (ORD) | B39M | 11:11 AM | 12:31 PM | Arrived |
| Tue, Mar 10 | Boston (BOS) | Chicago (ORD) | B39M | 11:12 AM | 12:32 PM | Arrived |
| Wed, Mar 11 | Boston (BOS) | Chicago (ORD) | B39M | 11:02 AM | 12:22 PM | Scheduled |
| Thu, Mar 12 | Boston (BOS) | Chicago (ORD) | B39M | 11:02 AM | 1:07 PM | Scheduled |
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UA503 On-Time Performance
Based on the average performance of this flight over the past 30 trips, the on-time departure rate of UA503 is 80% (Late on average 1 hour20 minutes), and the on-time arrival rate is 80% (Late on average 39 minutes).
On-Time Departures
Punctuality
80%
Late on average 1 hour20 minutes
Early
0%
On time
80%
30 mins late
0%
60 mins late
0%
90 mins late
20%
Canceled
0%
On-Time Arrivals
Punctuality
80%
Late on average 39 minutes
Early
80%
On time
0%
30 mins late
0%
60 mins late
0%
90 mins late
20%
Canceled
0%
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Arrival Info: Chicago Weather & Current Time
Cloudy with showers
|
3°C - 11°C
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-1 hour time difference
Time on arrival: Boston 13:22| Chicago 12:22
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