Apparatus

Try JFK, AAL1290, BAW, or N225AN.

flight_takeoff Flight

UAL503

Operated by UAL

Live map

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

Route airports View route page →

Departure

BOS KBOS

Boston Logan International Airport

Boston, US

Local time
21:41 EDT
Timezone
America/New_York
Type
Large Airport
Elevation
20 ft
Coordinates
42.3620, -71.0079

flight Live Traffic

flight_takeoff 269 Departures
flight_land 286 Arrivals

schedule Forecast (TAF) 

TAF KBOS 282320Z 2900/3006 28008KT P6SM FEW050 FM290400 34010G18KT P6SM FEW050 FM291300 02006KT P6SM SKC FM291600 12010KT P6SM SKC FM300000 19006KT P6SM SKC

Arrival

ORD KORD VFR

Chicago O'Hare International Airport

Chicago, US

Local time
20:41 CDT
Timezone
America/Chicago
Type
Large Airport
Elevation
680 ft
Coordinates
41.9786, -87.9048

cloud Weather

Wind
260° / 5 kt
Visibility
10 SM
Ceiling
FEW 5,500 ft, BKN 25,000 ft
Temp / Dew
25°C / 15°C
Altimeter
30.09 inHg

Obs: 2026-08-29T00:51:00.000Z

Raw METAR / TAF 
METAR KORD 290051Z 26005KT 10SM FEW055 BKN250 25/15 A3009 RMK AO2 SLP185 T02500150 $

TAF KORD 282320Z 2900/3006 23006KT P6SM FEW060 SCT250 TEMPO 2900/2901 07007KT FM291500 22009KT P6SM FEW045 BKN250 FM292000 20011G17KT P6SM FEW045 BKN120 FM300100 17010KT P6SM BKN120

flight Live Traffic

flight_takeoff 408 Departures
flight_land 334 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-07-26 A0BF26 RDU → EWR Jul 26, 14:50 UTCJul 26, 16:50 UTC2h 0m - -
2026-07-25 A097E9 RDU → EWR Jul 25, 21:25 UTCJul 25, 23:25 UTC2h 0m - -
2026-07-24 A0BF26 RDU → EWR Jul 24, 21:30 UTCJul 24, 23:30 UTC2h 0m - -
2026-07-24 AA568E RDU → EWR Jul 24, 15:00 UTCJul 24, 17:10 UTC2h 10m - -
2026-07-23 A097E9 RDU → EWR Jul 23, 15:05 UTCJul 23, 17:15 UTC2h 10m - -
2026-07-22 A43E7F RDU → EWR Jul 22, 14:55 UTCJul 22, 15:45 UTC50m - -
2026-07-22 A43E7F RDU → EWR Jul 22, 14:49 UTCJul 22, 17:03 UTC2h 14m +14m -5m
2026-07-21 A10E21 RDU → EWR Jul 21, 16:20 UTCJul 21, 18:40 UTC2h 20m - -
2026-07-20 AA56B5 RDU → EWR Jul 20, 14:55 UTCJul 20, 17:05 UTC2h 10m - -
2026-07-19 A10E23 RDU → EWR Jul 19, 14:55 UTCJul 19, 17:20 UTC2h 25m - -
2026-07-19 A10E23 RDU → EWR Jul 19, 14:49 UTCJul 19, 17:01 UTC2h 12m +14m +3m
2026-07-19 A0E751 RDU → EWR Jul 19, 01:05 UTCJul 19, 03:00 UTC1h 55m - -
2026-07-17 A0BF26 - Jul 17, 22:25 UTCJul 18, 00:19 UTC1h 55m - -
2026-07-17 A0BF26 ORD → EGE Jul 17, 22:33 UTCJul 18, 00:27 UTC1h 54m +93m -18m
2026-07-17 A92478 - Jul 17, 14:55 UTCJul 17, 16:59 UTC2h 5m - -
2026-07-16 A097CE - Jul 16, 14:45 UTCJul 16, 15:30 UTC45m - -
2026-07-16 A097CE BOS → ORD Jul 16, 14:49 UTCJul 16, 16:57 UTC2h 8m +14m +3m
2026-07-15 A097CE BOS → ORD Jul 15, 14:50 UTCJul 15, 17:00 UTC2h 10m - -
2026-07-14 A2B0ED BOS → ORD Jul 14, 14:49 UTCJul 14, 16:44 UTC1h 55m +14m +14m
2026-07-14 A2B0ED BOS → ORD Jul 14, 14:40 UTCJul 14, 16:45 UTC2h 5m - -
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 - -

Performance history

Flights tracked
187 showing last 30
Avg arrival delay
-1m
On-time arrival
100% 100% on time
Aircraft used
17

Monthly activity 4 months

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

UAL503 frequently asked

Where does flight UAL503 fly?
UAL503 (UAL) flies from BOS to ORD. View the full route page.
How long is flight UAL503?
Based on observed flights, UAL503 takes on average 1h 56m 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 187 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 17 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.