Apparatus

Try JFK, AAL1290, BAW, or N225AN.

flight_takeoff Flight

UAL503

Live map

Live map filtered to UAL503. Shown when the flight is currently airborne.

Route airports View route page →

Departure

BOS KBOS VFR

Boston Logan International Airport

Boston, US

Local time
08:10 EDT
Timezone
America/New_York
Type
Large Airport
Elevation
20 ft
Coordinates
42.3620, -71.0079

cloud Weather

Wind
250° / 13G20 kt
Visibility
10 SM
Ceiling
FEW 16,000 ft, BKN 25,000 ft
Temp / Dew
25°C / 17°C
Altimeter
29.97 inHg

Obs: 2026-07-14T11:54:00.000Z

Raw METAR / TAF 
METAR KBOS 141154Z 25013G20KT 10SM FEW160 BKN250 25/17 A2997 RMK AO2 SLP147 T02500172 10250 20222 56007 $

TAF KBOS 141120Z 1412/1518 23015KT P6SM SCT250 FM141500 23017G28KT P6SM BKN200 FM150100 25011KT P6SM SCT050 BKN200 FM150700 29012G20KT P6SM BKN200 PROB30 1509/1512 5SM -SHRA BKN050

flight Live Traffic

flight_takeoff 227 Departures
flight_land 243 Arrivals

Arrival

ORD KORD VFR

Chicago O'Hare International Airport

Chicago, US

Local time
07:10 CDT
Timezone
America/Chicago
Type
Large Airport
Elevation
680 ft
Coordinates
41.9786, -87.9048

cloud Weather

Wind
290° / 3 kt
Visibility
10 SM
Ceiling
FEW 25,000 ft
Temp / Dew
24°C / 20°C
Altimeter
30.18 inHg

Obs: 2026-07-14T11:51:00.000Z

Raw METAR / TAF 
METAR KORD 141151Z 29003KT 10SM FEW250 24/20 A3018 RMK AO2 SLP214 T02440200 10261 20233 53008 $

TAF KORD 141126Z 1412/1518 31005KT P6SM SKC FM141900 08006KT P6SM SKC FM142300 26005KT P6SM SKC

flight Live Traffic

flight_takeoff 1137 Departures
flight_land 787 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-07-13 A0BF26 BOS → ORD Jul 13, 14:45 UTCJul 13, 16:50 UTC2h 5m - -
2026-07-12 A3A0ED BOS → ORD Jul 12, 14:45 UTCJul 12, 17:01 UTC2h 15m - -
2026-07-11 A0BF26 - Jul 11, 22:30 UTCJul 12, 00:30 UTC2h 0m - -
2026-07-10 A224F9 - Jul 10, 21:35 UTCJul 10, 23:35 UTC2h 0m - -
2026-07-10 A43E5C - Jul 10, 15:00 UTCJul 10, 17:10 UTC2h 10m - -
2026-07-09 A41722 BOS → ORD Jul 9, 14:45 UTCJul 9, 16:45 UTC2h 0m - -
2026-07-08 A9D5E4 - Jul 8, 16:45 UTCJul 8, 16:55 UTC10m - -
2026-07-08 A9D5E4 BOS → ORD Jul 8, 14:49 UTCJul 8, 16:30 UTC1h 41m +14m -1m
2026-07-08 A9D5E4 BOS → ORD Jul 8, 14:40 UTCJul 8, 16:55 UTC2h 15m - -
2026-07-07 A13650 BOS → ORD Jul 7, 14:45 UTCJul 7, 17:00 UTC2h 15m - -
2026-07-07 A13650 BOS → ORD Jul 7, 14:49 UTCJul 7, 16:46 UTC1h 57m +14m +5m
2026-07-06 A2B8C5 - Jul 6, 14:45 UTCJul 6, 16:55 UTC2h 10m - -
2026-07-05 A3EF1B - Jul 5, 16:55 UTCJul 5, 17:10 UTC15m - -
2026-07-05 A3EF1B BOS → ORD Jul 5, 14:49 UTCJul 5, 16:40 UTC1h 51m +14m -5m
2026-07-05 A3EF1B - Jul 5, 14:40 UTCJul 5, 16:45 UTC2h 5m - -
2026-07-04 A097CC - Jul 4, 22:00 UTCJul 5, 00:10 UTC2h 10m - -
2026-07-04 A097CC BOS → ORD Jul 4, 21:48 UTCJul 5, 00:17 UTC2h 29m -1007m -13m
2026-07-03 AA7E7C BOS → ORD Jul 3, 14:55 UTCJul 3, 17:05 UTC2h 10m - -
2026-07-02 A0ACF9 BOS → ORD Jul 2, 14:49 UTCJul 2, 16:54 UTC2h 5m +14m +2m
2026-07-02 A0ACF9 - Jul 2, 14:50 UTCJul 2, 17:05 UTC2h 15m - -
2026-07-01 AACD50 BOS → ORD Jul 1, 14:45 UTCJul 1, 17:00 UTC2h 15m - -
2026-06-30 A288E4 BOS → ORD Jun 30, 14:40 UTCJun 30, 16:50 UTC2h 10m - -
2026-06-29 A43E83 BOS → ORD Jun 29, 14:44 UTCJun 29, 16:59 UTC2h 15m - -
2026-06-28 A4453E - Jun 28, 14:54 UTCJun 28, 17:04 UTC2h 10m - -
2026-06-27 A135CB - Jun 27, 21:25 UTCJun 27, 23:34 UTC2h 10m - -
2026-06-27 A135CB ORD → EGE Jun 27, 21:33 UTCJun 27, 23:51 UTC2h 18m +33m +4m
2026-06-26 A0AD1B BOS → ORD Jun 26, 19:09 UTCJun 26, 21:35 UTC2h 25m - -
2026-06-25 A46CE1 BOS → ORD Jun 25, 14:50 UTCJun 25, 17:14 UTC2h 25m - -
2026-06-24 AA7F09 BOS → ORD Jun 24, 14:50 UTCJun 24, 17:05 UTC2h 15m - -
2026-06-23 AB1B3E - Jun 23, 17:04 UTCJun 23, 19:15 UTC2h 10m - -

Performance history

Flights tracked
167 showing last 30
Avg arrival delay
-1m
On-time arrival
100% 100% on time
Aircraft used
21

Monthly activity 4 months

Month Flights tracked
July 2026 21
June 2026 41
May 2026 64
April 2026 41

UAL503 frequently asked

Where does flight UAL503 fly?
UAL503 flies from BOS to ORD. View the full route page.
How long is flight UAL503?
Based on observed flights, UAL503 takes on average 2h 2m from takeoff to landing.
How often does UAL503 fly?
UAL503 has been observed flying several times a week in our tracking data. We've recorded 167 flights under this callsign.
Is flight UAL503 usually on time?
Across recent flights, UAL503 arrives 1 minutes early on average. 100% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL503?
UAL503 has been operated by 21 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL503 live?
Yes. When UAL503 is currently airborne, the live tracker map above shows its real-time position from ADS-B broadcasts. If the map is empty, the flight is not currently in the air.