United Airlines
UA503 Flight Status
According to Trip.com latest record on status for United Airlines flight UA503 from Boston to Chicago (BOS-ORD): Flights for Oct 2, 2026 are scheduled, with the next departure slated for 10:36 from BOS and an expected arrival at 12:29 at ORD .
Thu, Oct 1
Fri, Oct 2
Sat, Oct 3
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Arrived
The flight arrived 26m early.
2h 53m
Check-in Counter
--
Boarding Gate
B25
Arrival Gate
E10
Baggage
5
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Scheduled
Your flight will depart on time.
2h 53m
Check-in Counter
--
Boarding Gate
B28
Arrival Gate
B2
Baggage
5
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Scheduled
Your flight will depart on time.
2h 53m
Check-in Counter
--
Boarding Gate
--
Arrival Gate
--
Baggage
5
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Flight.News
A Flood Watch is in effect for Chicago through this evening due to potential excessive rainfall. Heavy rain, with totals of 2 inches or more possible in a few hours over saturated ground, may cause creeks and streams to overflow, leading to flooding in low-lying and flood-prone areas.
Track the Previous Flight Status: Scheduled
UA1186
|
Chicago (CHI)
Boston (BOS)
Boston (BOS)
Scheduled: 09:33
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UA503 Aircraft Specifications
According to Trip.com real-time data, the UA503 flight from Boston to Chicago on 10/2/2026 is operated using the aircraft model Boeing 737-800. This aircraft has been in service for 10y, 1m. The aircraft has 166 seats.
Boeing 737-800
On-Time Departure
70
%
On-Time Arrival
83
%
Avg. Early
6 minutes
Aircraft Age
10y, 1m
Total Seats
166
Flight Distance
--
Economy
First
Premium Economy
Cabin Amenities
None
Seatback entertainment system
Wi-Fi (additional charge)
USB port and power outlet
Seat Information
76 cm
Legroom
--
Seat width
100°
Reclining Angle
3-3
Seat layout example
Cabin Amenities
Snacks
Seatback entertainment system
Wi-Fi (additional charge)
USB port and power outlet
Seat Information
94 cm
More legroom than on 7% of flights
52 cm
Seat width better than on 47% of flights
120°
Reclining Angle
2-2
Seat layout example
Cabin Amenities
Snacks
Live TV
Wi-Fi is available
Power outlet
Seat Information
86 cm
More legroom than on 4% of flights
--
Seat width
100°
Reclining Angle
3-3
Seat layout example
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UA503 Flight History
Trip.com historical records show that the last UA503 flight departed on Thu, Oct 1 from BOS at approximately 10:49. This flight is expected to arrrive in ORD at 12:03.
| Date | Airport | Aircraft Model | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Departure | Arrival | |||||
| Sun, Sep 27 | Boston (BOS) | Chicago (ORD) | 738 | 12:25 | 13:17 | Arrived |
| Mon, Sep 28 | Boston (BOS) | Chicago (ORD) | 738 | 11:47 | 12:45 | Arrived |
| Tue, Sep 29 | Boston (BOS) | Chicago (ORD) | 738 | 10:45 | 11:44 | Arrived |
| Wed, Sep 30 | Boston (BOS) | Chicago (ORD) | 738 | 10:42 | 11:52 | Arrived |
| Thu, Oct 1 | Boston (BOS) | Chicago (ORD) | 738 | 10:49 | 12:03 | Arrived |
| Fri, Oct 2 | Boston (BOS) | Chicago (ORD) | 738 | 10:36 | 12:29 | Scheduled |
| Sat, Oct 3 | Boston (BOS) | Chicago (ORD) | 320 | 10:36 | 12:29 | Scheduled |
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UA503 On-Time Performance
Based on the average performance of this flight over the last 30 trips, the on-time departure rate of UA503 is 70% (Late on average 34 minutes), and the on-time arrival rate is 83% (Early on average 6 minutes).
On-Time Departures
Punctuality
70
%
Late on average
34 minutes
Early
0
%
On time
70
%
30 mins late
10
%
60 mins late
7
%
90 mins late
13
%
Cancelled
0
%
On-Time Arrivals
Punctuality
83
%
Early on average
6 minutes
Early
77
%
On time
7
%
30 mins late
7
%
60 mins late
3
%
90 mins late
7
%
Cancelled
0
%
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Flight FAQs
-
What is the current status of flight ua503?
Flight ua503 has not departed yet and is currently on schedule. Scheduled departure 10:36, arrival 12:29 (updated Oct 2, 2026). -
Is flight ua503 on time today?
Flight ua503 has not departed yet and is currently on schedule. Scheduled departure is 10:36, with arrival at 12:29. Recheck gate and timing before you head to the airport. -
Has flight ua503 departed yet? What is the departure time?
Flight ua503 is scheduled to depart at 10:36. The latest actual or estimated departure time is 10:36, and the current status is Scheduled (updated Oct 2, 2026). -
When is flight ua503 scheduled to arrive?
Flight ua503 is scheduled to arrive at 12:29. The latest estimated or actual arrival time is 12:29. Status is Scheduled as of Oct 2, 2026. -
What is the gate information for flight ua503?
For flight ua503, the departure terminal is B and the boarding gate is B28. Gate assignments can change at short notice—confirm on airport screens before heading to security. -
What is the baggage carousel number for flight ua503?
After arrival, baggage for flight ua503 is expected at carousel 5 in terminal T1. Carousel numbers are assigned close to landing and may change—follow airport signs on arrival. -
What route does flight ua503 fly?
Flight ua503 is operated by United Airlines from Boston (BOS) to Chicago (ORD). Typical flight time is about 2 hours 53 minutes; operating days may include Friday. -
How can I check real-time status for flight ua503?
Track flight ua503 on this Trip.com status page for live departure, arrival, gate and baggage updates. For push alerts on the go, open the same flight in the Trip.com App and turn on flight notifications. -
If flight ua503 is delayed or canceled, what should I do?
If ua503 is delayed or canceled, first confirm the latest status here (Scheduled, updated Oct 2, 2026). Contact United Airlines or your booking channel for rebooking or refund options, and check Trip.com Manage Booking if you booked on Trip.com. -
Has flight ua503 departed from Boston?
Flight ua503 has not departed from Boston (BOS) yet and is currently on schedule for 10:36. -
What is the seat configuration for flight ua503?
Flight ua503 usually flies a Boeing 737-800 with seat layout 3-3. Layouts can differ by aircraft subtype and cabin product—confirm your seat map in Manage Booking after you purchase.
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Time on arrival: Boston 13:29
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