UAL1577

UNITED AIRLINES INC · ORD → SFO

UAL1577 is operated by UNITED AIRLINES INC between Chicago O'Hare International Airport (KORD) and San Francisco International Airport (KSFO). The flight is most often flown by a BOEING Boeing 757-300. Typical block time is 2h 44m. SkyMeter has observed 176 legs of this flight number via ADS-B.

✈
FLIGHTS
176
last 90 days
⏱
AVG DURATION
2h 44m
tracked time
📅
SERVICE PERIOD
05/27/2025 → 08/29/2026
first → last seen
🗺
ROUTES / TYPES
15 / 9
city pairs · airframes
⚠
INCIDENT RATE
0.6%
1 flagged

Routes flown

By count · last 90 days

10
KORD → KSFO
55
avg 4h 21m · Chicago O'Hare → San Francisco
KSFO → KSEA
36
avg 2h 7m · San Francisco → Seattle Tacoma
KATL → KORD
19
avg 1h 50m · Hartsfield Jackson Atlanta → Chicago O'Hare
KSFO → KSAN
9
avg 1h 45m · San Francisco → San Diego
US-2773 → KSFO
4
avg 27m · Ravenswood Substation Helipad → San Francisco
KHAF → KSEA
4
avg 2h 14m · Half Moon Bay → Seattle Tacoma
KOAK → KSEA
3
avg 2h 10m · Metropolitan Oakland → Seattle Tacoma
KHAF → KSAN
3
avg 1h 54m · Half Moon Bay → San Diego
US-2362 → KSFO
2
avg 10m · San Mateo → San Francisco
US-2390 → KSFO
2
avg 15m · Cooley Field → San Francisco

Aircraft types

Equipment used on this number

9
B753 BOEING Boeing 757-300
179
A320 AIRBUS Airbus A320
45
A319 AIRBUS Airbus A319
22
B38M BOEING Boeing 737 MAX 8
13
A21N AIRBUS Airbus A321 Neo
6
B752 BOEING Boeing 757-200
3
B39M BOEING Boeing 737 MAX 9
2
B739 BOEING Boeing 737-900
1
ST75 ST75
1

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 UAL1577

30
N17557BOEING Boeing 737 MAX 9
→
08/29/2026
1h 36m
No alerts
Replay Analysis
N47369BOEING Boeing 737 MAX 8
→
08/28/2026
1h 47m
No alerts
Replay Analysis
N17315BOEING Boeing 737 MAX 8
→
08/27/2026
2h 1m
No alerts
Replay Analysis
N77871BOEING Boeing 757-300
→
08/27/2026
26m
No alerts
Replay Analysis
N77871BOEING Boeing 757-300
→
08/26/2026
3h 54m
No alerts
Replay Analysis
N77871BOEING Boeing 757-300
→
08/26/2026
4h 21m
No alerts
Replay Analysis
N37324BOEING Boeing 737 MAX 8
→
08/26/2026
1h 44m
No alerts
Replay Analysis
N57855BOEING Boeing 757-300
→
08/25/2026
3h 59m
No alerts
Replay Analysis
N57855BOEING Boeing 757-300
→
08/25/2026
15m
No alerts
Replay Analysis
N75861BOEING Boeing 757-300
→
08/25/2026
1h 22m
No alerts
Replay Analysis
N77871BOEING Boeing 757-300
→
08/24/2026
13m
No alerts
Replay Analysis
N77871BOEING Boeing 757-300
→
08/23/2026
3h 56m
No alerts
Replay Analysis
N77871BOEING Boeing 757-300
→
08/23/2026
4h 9m
No alerts
Replay Analysis
N17339BOEING Boeing 737 MAX 8
→
08/23/2026
1h 42m
No alerts
Replay Analysis
N78866BOEING Boeing 757-300
→
08/23/2026
40m
No alerts
Replay Analysis
N78866BOEING Boeing 757-300
→
08/22/2026
4h 11m
No alerts
Replay Analysis
N78866BOEING Boeing 757-300
→
08/22/2026
4h 51m
No alerts
Replay Analysis
N17455BOEING Boeing 737 MAX 9
→
08/22/2026
1h 33m
No alerts
Replay Analysis
N54561ST75
→
08/22/2026
1h 18m
No alerts
Replay Analysis
N56859BOEING Boeing 757-300
→
08/21/2026
1h 35m
No alerts
Replay Analysis
N56859BOEING Boeing 757-300
→
08/20/2026
4h 35m
No alerts
Replay Analysis
N56859BOEING Boeing 757-300
→
08/20/2026
2h 59m
No alerts
Replay Analysis
N57852BOEING Boeing 757-300
→
08/18/2026
4h 13m
No alerts
Replay Analysis
N27269BOEING Boeing 737 MAX 8
→
08/18/2026
2h 5m
No alerts
Replay Analysis
N77867BOEING Boeing 757-300
→
08/18/2026
28m
No alerts
Replay Analysis
N77867BOEING Boeing 757-300
→
08/17/2026
4h 21m
No alerts
Replay Analysis
N77867BOEING Boeing 757-300
→
08/17/2026
3h 53m
No alerts
Replay Analysis
N27366BOEING Boeing 737 MAX 8
→
08/17/2026
1h 39m
No alerts
Replay Analysis
N57869BOEING Boeing 757-300
→
08/17/2026
1h 0m
No alerts
Replay Analysis
N57869BOEING Boeing 757-300
→
08/16/2026
4h 13m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window