UAL557 is operated by UNITED AIRLINES INC between Billings Logan International Airport (KBIL) and Denver International Airport (KDEN). The flight is most often flown by a BOEING Boeing 737 MAX 9. Typical block time is 2h 8m. SkyMeter has observed 99 legs of this flight number via ADS-B.

✈
FLIGHTS
99
last 90 days
⏱
AVG DURATION
2h 8m
tracked time
📅
SERVICE PERIOD
05/27/2025 → 08/18/2026
first → last seen
🗺
ROUTES / TYPES
18 / 4
city pairs · airframes
⚠
INCIDENT RATE
1.0%
1 flagged

Routes flown

By count · last 90 days

10
KBIL → KDEN
31
avg 1h 31m · Billings Logan → Denver
KCHS → KDEN
23
avg 3h 42m · Charleston Air Force Base-International → Denver
1CO8 → KDEN
3
avg 28m · Everitt → Denver
KORD → KDEN
1
avg 2h 19m · Chicago O'Hare → Denver
71CO → KDEN
1
avg 18m · Houston Heliport → Denver
2CO9 → KDEN
1
avg 1h 6m · Lands End Heliport → Denver
1CD2 → KDEN
1
avg 33m · Tonga → Denver
US-2549 → KDEN
1
avg 19m · Bigfoot Turf → Denver
KBIL → KFTG
1
avg 1h 41m · Billings Logan → Colorado Air and Space Port
KCHS → KORD
1
avg 1h 59m · Charleston Air Force Base-International → Chicago O'Hare

Aircraft types

Equipment used on this number

4
B39M BOEING Boeing 737 MAX 9
71
B739 BOEING Boeing 737-900
45
B738 BOEING Boeing 737-800
21
A320 AIRBUS Airbus A320
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 UAL557

30
N77518BOEING Boeing 737-800
→
08/18/2026
3h 11m
No alerts
Replay Analysis
N76508BOEING Boeing 737-800
→
08/17/2026
3h 9m
No alerts
Replay Analysis
N35204BOEING Boeing 737-800
→
08/17/2026
2h 39m
No alerts
Replay Analysis
N35204BOEING Boeing 737-800
→
08/16/2026
1h 28m
No alerts
Replay Analysis
N35204BOEING Boeing 737-800
→
08/16/2026
4h 7m
No alerts
Replay Analysis
N477UAAIRBUS Airbus A320
→
08/15/2026
1h 7m
No alerts
Replay Analysis
N77296BOEING Boeing 737-800
→
08/15/2026
3h 23m
No alerts
Replay Analysis
N77296BOEING Boeing 737-800
→
08/14/2026
46m
No alerts
Replay Analysis
N77296BOEING Boeing 737-800
→
08/14/2026
4h 10m
No alerts
Replay Analysis
N35236BOEING Boeing 737-800
→
08/14/2026
1h 5m
No alerts
Replay Analysis
N35236BOEING Boeing 737-800
→
08/14/2026
24m
No alerts
Replay Analysis
N35236BOEING Boeing 737-800
→
08/13/2026
3h 17m
No alerts
Replay Analysis
N35236BOEING Boeing 737-800
→
08/13/2026
3h 42m
No alerts
Replay Analysis
N78524BOEING Boeing 737-800
→
08/12/2026
15m
No alerts
Replay Analysis
N78524BOEING Boeing 737-800
→
08/11/2026
3h 3m
No alerts
Replay Analysis
N37466BOEING Boeing 737-900
→
08/10/2026
1h 40m
△ Low approach-stability score
Replay Analysis
N39475BOEING Boeing 737-900
→
08/08/2026
1h 39m
No alerts
Replay Analysis
N66825BOEING Boeing 737-900
→
08/07/2026
1h 37m
No alerts
Replay Analysis
N67845BOEING Boeing 737-900
→
08/06/2026
1h 39m
No alerts
Replay Analysis
N38446BOEING Boeing 737-900
→
08/05/2026
1h 41m
No alerts
Replay Analysis
N68823BOEING Boeing 737-900
→
08/04/2026
1h 21m
No alerts
Replay Analysis
N68823BOEING Boeing 737-900
→
08/04/2026
8m
No alerts
Replay Analysis
N77537BOEING Boeing 737-800
→
08/02/2026
1h 29m
No alerts
Replay Analysis
N37434BOEING Boeing 737-900
→
07/31/2026
1h 31m
No alerts
Replay Analysis
N37437BOEING Boeing 737-900
→
07/30/2026
1h 21m
No alerts
Replay Analysis
N66831BOEING Boeing 737-900
→
07/29/2026
1h 35m
No alerts
Replay Analysis
N68891BOEING Boeing 737-900
→
07/28/2026
1h 38m
No alerts
Replay Analysis
N36469BOEING Boeing 737-900
→
07/27/2026
1h 55m
No alerts
Replay Analysis
N14231BOEING Boeing 737-800
→
07/26/2026
14m
No alerts
Replay Analysis
N14231BOEING Boeing 737-800
→
07/26/2026
1h 18m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window