Flight Status & Tracker

UAL503

UNITED AIRLINES INC · BOS → ORD · Last tracked Sep 27, 2026

UAL503 is a flight number operated by UNITED AIRLINES INC between General Edward Lawrence Logan International Airport (KBOS) and Chicago O'Hare International Airport (KORD). SkyMeter last tracked UAL503 on September 27, 2026. The flight is most often flown by a BOEING Boeing 737 MAX 8. Typical block time is 2h 13m. SkyMeter has observed 98 legs of this flight number via ADS-B.

SkyMeter tracks historical flight activity from ADS-B data — this is not a live gate-to-gate status feed.

✈
FLIGHTS
98
last 90 days
⏱
AVG DURATION
2h 13m
tracked time
📅
SERVICE PERIOD
5/27/2025 → 9/27/2026
first → last seen
🗺
ROUTES / TYPES
7 / 6
city pairs · airframes
⚠
INCIDENT RATE
0.0%
0 flagged

Routes flown

By count · last 90 days

4
KBOS → KORD
68
avg 2h 26m · General Edward Lawrence Logan → Chicago O'Hare
9IS6 → KORD
1
avg 7m · Evanston Water Plant Heliport → Chicago O'Hare
KBOS → KGRR
1
avg 2h 59m · General Edward Lawrence Logan → Gerald R. Ford
KGRR → KORD
1
avg 37m · Gerald R. Ford → Chicago O'Hare

Aircraft types

Equipment used on this number

6
B38M BOEING Boeing 737 MAX 8
34
B738 BOEING Boeing 737-800
26
B737 BOEING Boeing 737-700
26
B39M BOEING Boeing 737 MAX 9
8
B739 BOEING Boeing 737-900
6
A320 AIRBUS Airbus A320
2

Safety profile

Flagged flights · last 90 days

Go-arounds
0
Unstable approach
0
Rejected TO
0
Stall warnings
0
Overspeeds
0
Runway excursion
0
Counts represent flights with at least one occurrence of each flag, not the total event count. See /incidents for individual events.

Recent flights

Newest 30 operations of UAL503

30
N78524BOEING Boeing 737-800
→
9/27/2026
2h 11m
No alerts
Replay Analysis
N27733BOEING Boeing 737-700
→
9/27/2026
33m
No alerts
Replay Analysis
N437UAAIRBUS Airbus A320
→
9/25/2026
2h 19m
No alerts
Replay Analysis
N452UAAIRBUS Airbus A320
→
9/24/2026
2h 7m
No alerts
Replay Analysis
N17358BOEING Boeing 737 MAX 8
→
9/23/2026
2h 44m
No alerts
Replay Analysis
N37307BOEING Boeing 737 MAX 8
→
9/22/2026
2h 42m
No alerts
Replay Analysis
N17312BOEING Boeing 737 MAX 8
→
9/21/2026
2h 34m
No alerts
Replay Analysis
N27269BOEING Boeing 737 MAX 8
→
9/20/2026
2h 33m
No alerts
Replay Analysis
N17301BOEING Boeing 737 MAX 8
→
9/19/2026
8m
No alerts
Replay Analysis
N17301BOEING Boeing 737 MAX 8
→
9/19/2026
44m
No alerts
Replay Analysis
N17301BOEING Boeing 737 MAX 8
→
9/19/2026
3h 12m
No alerts
Replay Analysis
N47332BOEING Boeing 737 MAX 8
→
9/18/2026
2h 32m
No alerts
Replay Analysis
N17331BOEING Boeing 737 MAX 8
→
9/17/2026
2h 47m
No alerts
Replay Analysis
N27568BOEING Boeing 737 MAX 9
→
9/16/2026
2h 35m
No alerts
Replay Analysis
N17363BOEING Boeing 737 MAX 8
→
9/15/2026
2h 38m
No alerts
Replay Analysis
N47291BOEING Boeing 737 MAX 8
→
9/14/2026
2h 19m
No alerts
Replay Analysis
N17346BOEING Boeing 737 MAX 8
→
9/13/2026
2h 33m
No alerts
Replay Analysis
N27334BOEING Boeing 737 MAX 8
→
9/12/2026
2h 44m
No alerts
Replay Analysis
N63899BOEING Boeing 737-900
→
9/11/2026
9m
No alerts
Replay Analysis
N63899BOEING Boeing 737-900
→
9/11/2026
2h 27m
No alerts
Replay Analysis
N62884BOEING Boeing 737-900
→
9/10/2026
2h 54m
No alerts
Replay Analysis
N27255BOEING Boeing 737 MAX 8
→
9/8/2026
2h 18m
No alerts
Replay Analysis
N14231BOEING Boeing 737-800
→
9/6/2026
2h 26m
No alerts
Replay Analysis
N27267BOEING Boeing 737 MAX 8
→
9/5/2026
2h 34m
No alerts
Replay Analysis
N27290BOEING Boeing 737 MAX 8
→
9/4/2026
5m
No alerts
Replay Analysis
N27290BOEING Boeing 737 MAX 8
→
9/4/2026
2h 36m
No alerts
Replay Analysis
N77259BOEING Boeing 737 MAX 8
→
9/2/2026
2h 26m
No alerts
Replay Analysis
N27271BOEING Boeing 737 MAX 8
→
9/1/2026
2h 23m
No alerts
Replay Analysis
N17595BOEING Boeing 737 MAX 9
→
8/31/2026
2h 41m
No alerts
Replay Analysis
N17346BOEING Boeing 737 MAX 8
→
8/30/2026
2h 35m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window