Flight Status & Tracker

UAL503

UNITED AIRLINES INC · BOS → ORD · Last tracked Nov 12, 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 November 11, 2026. The flight is most often flown by a BOEING Boeing 737 MAX 8. Typical block time is 2h 2m. SkyMeter has observed 106 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
106
last 90 days
⏱
AVG DURATION
2h 2m
tracked time
📅
SERVICE PERIOD
5/27/2025 → 11/12/2026
first → last seen
🗺
ROUTES / TYPES
7 / 7
city pairs · airframes
⚠
INCIDENT RATE
0.9%
1 flagged

Routes flown

By count · last 90 days

3
KBOS → KORD
59
avg 2h 28m · General Edward Lawrence Logan → Chicago O'Hare
KORD → KFLL
10
avg 2h 57m · Chicago O'Hare → Fort Lauderdale Hollywood
KEWR → KBOS
8
avg 1h 3m · Newark Liberty → General Edward Lawrence Logan

Aircraft types

Equipment used on this number

7
B38M BOEING Boeing 737 MAX 8
54
B738 BOEING Boeing 737-800
21
B739 BOEING Boeing 737-900
16
B39M BOEING Boeing 737 MAX 9
11
A320 AIRBUS Airbus A320
5
B737 BOEING Boeing 737-700
3
A21N AIRBUS Airbus A321 Neo
2

Safety profile

Flagged flights · last 90 days

Go-arounds
0
Unstable approach
1
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
N17479
→
11/12/2026
34m
No alerts
Replay Analysis
N37450BOEING Boeing 737 MAX 9
→
11/11/2026
48m
No alerts
Replay Analysis
N73278BOEING Boeing 737-800
→
11/10/2026
32m
No alerts
Replay Analysis
N17437BOEING Boeing 737 MAX 9
→
11/8/2026
56m
No alerts
Replay Analysis
N17437BOEING Boeing 737 MAX 9
→
11/7/2026
2h 5m
No alerts
Replay Analysis
N17437BOEING Boeing 737 MAX 9
→
11/7/2026
3h 1m
No alerts
Replay Analysis
N25705BOEING Boeing 737-700
→
11/6/2026
1h 13m
↘ Diverted
Replay Analysis
N57299BOEING Boeing 737 MAX 8
→
11/6/2026
31m
No alerts
Replay Analysis
N57299BOEING Boeing 737 MAX 8
→
11/5/2026
2h 51m
No alerts
Replay Analysis
N57299BOEING Boeing 737 MAX 8
→
11/5/2026
2h 19m
No alerts
Replay Analysis
N27283BOEING Boeing 737 MAX 8
→
11/5/2026
2h 21m
No alerts
Replay Analysis
N17488
→
11/5/2026
1h 2m
No alerts
Replay Analysis
N28478BOEING Boeing 737-900
→
11/5/2026
1h 53m
No alerts
Replay Analysis
N28478BOEING Boeing 737-900
→
11/5/2026
2h 41m
No alerts
Replay Analysis
N28478BOEING Boeing 737-900
→
11/5/2026
47m
No alerts
Replay Analysis
N27273BOEING Boeing 737 MAX 8
→
11/4/2026
1h 15m
No alerts
Replay Analysis
N27273BOEING Boeing 737 MAX 8
→
11/3/2026
3h 32m
No alerts
Replay Analysis
N27273BOEING Boeing 737 MAX 8
→
11/3/2026
2h 17m
No alerts
Replay Analysis
N17458BOEING Boeing 737 MAX 9
→
11/3/2026
12m
No alerts
Replay Analysis
N17458BOEING Boeing 737 MAX 9
→
11/3/2026
2h 17m
No alerts
Replay Analysis
N37325BOEING Boeing 737 MAX 8
→
11/3/2026
1h 1m
No alerts
Replay Analysis
N27290BOEING Boeing 737 MAX 8
→
11/3/2026
3h 9m
No alerts
Replay Analysis
N27290BOEING Boeing 737 MAX 8
→
11/2/2026
5m
No alerts
Replay Analysis
N17358BOEING Boeing 737 MAX 8
→
11/2/2026
2h 8m
No alerts
Replay Analysis
N17358BOEING Boeing 737 MAX 8
→
11/2/2026
53m
No alerts
Replay Analysis
N37434BOEING Boeing 737-900
→
11/1/2026
57m
No alerts
Replay Analysis
N27274BOEING Boeing 737 MAX 8
→
10/30/2026
2h 48m
No alerts
Replay Analysis
N17410BOEING Boeing 737 MAX 9
→
10/30/2026
2h 45m
No alerts
Replay Analysis
N27734BOEING Boeing 737-700
→
10/30/2026
1h 12m
No alerts
Replay Analysis
N17317BOEING Boeing 737 MAX 8
→
10/29/2026
2h 53m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window