UAL557 is operated by UNITED AIRLINES INC between Charleston Air Force Base-International Airport (KCHS) and Denver International Airport (KDEN). The flight is most often flown by a BOEING Boeing 737 MAX 9. Typical block time is 2h 32m. SkyMeter has observed 96 legs of this flight number via ADS-B.

✈
FLIGHTS
96
last 90 days
⏱
AVG DURATION
2h 32m
tracked time
📅
SERVICE PERIOD
05/27/2025 → 07/18/2026
first → last seen
🗺
ROUTES / TYPES
16 / 4
city pairs · airframes
⚠
INCIDENT RATE
1.0%
1 flagged

Routes flown

By count · last 90 days

10
KCHS → KDEN
41
avg 3h 38m · Charleston Air Force Base-International → Denver
KBIL → KDEN
19
avg 1h 29m · Billings Logan → Denver
1CO8 → KDEN
2
avg 34m · Everitt → Denver
KCHS → KORD
1
avg 1h 59m · Charleston Air Force Base-International → Chicago O'Hare
CO82 → KDEN
1
avg 12m · Land → Denver
60CO → KDEN
1
avg 14m · Stevens → Denver
1CD2 → KDEN
1
avg 33m · Tonga → Denver
US-2549 → KDEN
1
avg 19m · Bigfoot Turf → Denver
71CO → KDEN
1
avg 18m · Houston Heliport → Denver
KORD → KDEN
1
avg 2h 19m · Chicago O'Hare → Denver

Aircraft types

Equipment used on this number

4
B39M BOEING Boeing 737 MAX 9
72
B738 BOEING Boeing 737-800
30
B739 BOEING Boeing 737-900
28
A320 AIRBUS Airbus A320
15

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
N39463BOEING Boeing 737-900
→
07/18/2026
1h 22m
No alerts
Replay Analysis
N75433BOEING Boeing 737-900
→
07/17/2026
1h 24m
No alerts
Replay Analysis
N36447BOEING Boeing 737-900
→
07/16/2026
1h 52m
No alerts
Replay Analysis
N37466BOEING Boeing 737-900
→
07/15/2026
1h 42m
No alerts
Replay Analysis
N75425BOEING Boeing 737-900
→
07/14/2026
1h 15m
No alerts
Replay Analysis
N66814BOEING Boeing 737-900
→
07/13/2026
1h 37m
No alerts
Replay Analysis
N33286BOEING Boeing 737-800
→
07/12/2026
1h 18m
No alerts
Replay Analysis
N47414BOEING Boeing 737-900
→
07/11/2026
1h 26m
No alerts
Replay Analysis
N39463BOEING Boeing 737-900
→
07/10/2026
1h 28m
No alerts
Replay Analysis
N36472BOEING Boeing 737-900
→
07/09/2026
1h 23m
No alerts
Replay Analysis
N62892BOEING Boeing 737-900
→
07/08/2026
1h 25m
No alerts
Replay Analysis
N69839BOEING Boeing 737-900
→
07/07/2026
1h 26m
No alerts
Replay Analysis
N38443BOEING Boeing 737-900
→
07/06/2026
1h 39m
No alerts
Replay Analysis
N11206BOEING Boeing 737-800
→
07/05/2026
1h 33m
No alerts
Replay Analysis
N38446BOEING Boeing 737-900
→
07/04/2026
1h 12m
No alerts
Replay Analysis
N39423BOEING Boeing 737-900
→
07/03/2026
1h 24m
No alerts
Replay Analysis
N67827BOEING Boeing 737-900
→
07/02/2026
1h 41m
No alerts
Replay Analysis
N27421BOEING Boeing 737-900
→
07/01/2026
1h 15m
No alerts
Replay Analysis
N34455BOEING Boeing 737-900
→
06/30/2026
1h 34m
No alerts
Replay Analysis
N68842BOEING Boeing 737-900
→
06/29/2026
1h 39m
No alerts
Replay Analysis
N78285BOEING Boeing 737-800
→
06/28/2026
1h 29m
No alerts
Replay Analysis
N67827BOEING Boeing 737-900
→
06/27/2026
1h 20m
No alerts
Replay Analysis
N61898BOEING Boeing 737-900
→
06/26/2026
1h 25m
No alerts
Replay Analysis
N75429BOEING Boeing 737-900
→
06/25/2026
1h 51m
No alerts
Replay Analysis
N27526BOEING Boeing 737 MAX 9
→
06/25/2026
46m
No alerts
Replay Analysis
N27526BOEING Boeing 737 MAX 9
→
06/24/2026
3h 16m
No alerts
Replay Analysis
N17430BOEING Boeing 737 MAX 9
→
06/24/2026
47m
No alerts
Replay Analysis
N17430BOEING Boeing 737 MAX 9
→
06/23/2026
3h 21m
No alerts
Replay Analysis
N17430BOEING Boeing 737 MAX 9
→
06/23/2026
4h 9m
No alerts
Replay Analysis
N17431BOEING Boeing 737 MAX 9
→
06/22/2026
3h 26m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window