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 40m. SkyMeter has observed 206 legs of this flight number via ADS-B.

✈
FLIGHTS
206
last 90 days
⏱
AVG DURATION
2h 40m
tracked time
📅
SERVICE PERIOD
5/27/2025 → 8/14/2026
first → last seen
🗺
ROUTES / TYPES
15 / 9
city pairs · airframes
⚠
INCIDENT RATE
0.5%
1 flagged

Routes flown

By count · last 90 days

10
KORD → KSFO
59
avg 4h 20m · Chicago O'Hare → San Francisco
KSFO → KSEA
44
avg 2h 7m · San Francisco → Seattle Tacoma
KATL → KORD
31
avg 1h 53m · Hartsfield Jackson Atlanta → Chicago O'Hare
KSFO → KSAN
7
avg 1h 36m · San Francisco → San Diego
US-2362 → KSFO
4
avg 14m · San Mateo → San Francisco
KHAF → KSEA
4
avg 2h 14m · Half Moon Bay → Seattle Tacoma
KCVG → KORD
4
avg 59m · Cincinnati Northern Kentucky → Chicago O'Hare
US-2773 → KSFO
4
avg 27m · Ravenswood Substation Helipad → San Francisco
KOAK → KSEA
3
avg 2h 10m · Metropolitan Oakland → Seattle Tacoma
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
55
A319 AIRBUS Airbus A319
30
A21N AIRBUS Airbus A321 Neo
22
B38M BOEING Boeing 737 MAX 8
6
B39M BOEING Boeing 737 MAX 9
5
B737 BOEING Boeing 737-700
4
B739 BOEING Boeing 737-900
4
B752 BOEING Boeing 757-200
3

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
N57855BOEING Boeing 757-300
→
8/14/2026
4h 7m
No alerts
Replay Analysis
N17337BOEING Boeing 737 MAX 8
→
8/14/2026
1h 51m
No alerts
Replay Analysis
N74856BOEING Boeing 757-300
→
8/14/2026
59m
No alerts
Replay Analysis
N74856BOEING Boeing 757-300
→
8/13/2026
5h 0m
No alerts
Replay Analysis
N74856BOEING Boeing 757-300
→
8/13/2026
4h 0m
No alerts
Replay Analysis
N75851BOEING Boeing 757-300
→
8/12/2026
36m
No alerts
Replay Analysis
N17317BOEING Boeing 737 MAX 8
→
8/12/2026
1h 39m
No alerts
Replay Analysis
N74856BOEING Boeing 757-300
→
8/12/2026
32m
No alerts
Replay Analysis
N74856BOEING Boeing 757-300
→
8/11/2026
4h 15m
No alerts
Replay Analysis
N74856BOEING Boeing 757-300
→
8/11/2026
4h 47m
No alerts
Replay Analysis
N458UAAIRBUS Airbus A320
→
8/11/2026
1h 58m
No alerts
Replay Analysis
N56859BOEING Boeing 757-300
→
8/10/2026
4h 16m
No alerts
Replay Analysis
N57870BOEING Boeing 757-300
→
8/10/2026
2h 24m
No alerts
Replay Analysis
N57870BOEING Boeing 757-300
→
8/9/2026
2h 27m
No alerts
Replay Analysis
N57870BOEING Boeing 757-300
→
8/9/2026
4h 51m
No alerts
Replay Analysis
N443UAAIRBUS Airbus A320
→
8/9/2026
1h 51m
No alerts
Replay Analysis
N477UAAIRBUS Airbus A320
→
8/8/2026
2h 10m
No alerts
Replay Analysis
N57855BOEING Boeing 757-300
→
8/8/2026
20m
No alerts
Replay Analysis
N57855BOEING Boeing 757-300
→
8/7/2026
3h 33m
No alerts
Replay Analysis
N57855BOEING Boeing 757-300
→
8/7/2026
3h 54m
No alerts
Replay Analysis
N57864BOEING Boeing 757-300
→
8/7/2026
2h 21m
No alerts
Replay Analysis
N57864BOEING Boeing 757-300
→
8/6/2026
2h 2m
No alerts
Replay Analysis
N57864BOEING Boeing 757-300
→
8/6/2026
4h 24m
No alerts
Replay Analysis
N464UAAIRBUS Airbus A320
→
8/6/2026
1h 58m
No alerts
Replay Analysis
N74856BOEING Boeing 757-300
→
8/6/2026
48m
No alerts
Replay Analysis
N74856BOEING Boeing 757-300
→
8/5/2026
3h 32m
No alerts
Replay Analysis
N74856BOEING Boeing 757-300
→
8/5/2026
15m
No alerts
Replay Analysis
N74856BOEING Boeing 757-300
→
8/5/2026
4h 57m
No alerts
Replay Analysis
N437UAAIRBUS Airbus A320
→
8/5/2026
2h 53m
No alerts
Replay Analysis
N75854BOEING Boeing 757-300
→
8/5/2026
17m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window