UAL3877 is operated by UNITED AIRLINES INC, ATTN TREASURER between Chicago O'Hare International Airport (KORD) and Smith Reynolds Airport (KINT). The flight is most often flown by a BOEING Boeing 737-900. Typical block time is 2h 46m. SkyMeter has observed 9 legs of this flight number via ADS-B.

✈
FLIGHTS
9
last 90 days
⏱
AVG DURATION
2h 46m
tracked time
📅
SERVICE PERIOD
04/07/2026 → 05/15/2026
first → last seen
🗺
ROUTES / TYPES
9 / 7
city pairs · airframes
⚠
INCIDENT RATE
11.1%
1 flagged

Routes flown

By count · last 90 days

7
KORD → KINT
1
avg 1h 17m · Chicago O'Hare → Smith Reynolds
KDEN → KIAB
1
avg 1h 11m · Denver → Mc Connell Air Force Base
1FL2 → KIAH
1
avg 1h 56m · Lake City Medical Center Heliport → George Bush Intercontinental Houston
KBNA → KIAH
1
avg 2h 0m · Nashville → George Bush Intercontinental Houston
KIAB → KIAH
1
avg 1h 22m · Mc Connell Air Force Base → George Bush Intercontinental Houston
KORD → KLCQ
1
avg 2h 4m · Chicago O'Hare → Lake City Gateway
NC63 → KIAH
1
avg 2h 26m · Robertson Field → George Bush Intercontinental Houston

Aircraft types

Equipment used on this number

7
B739 BOEING Boeing 737-900
3
A21N AIRBUS Airbus A321 Neo
1
A320 AIRBUS Airbus A320
1
B38M BOEING Boeing 737 MAX 8
1
A319 AIRBUS Airbus A319
1
B737 BOEING Boeing 737-700
1
B789 BOEING Boeing 787-9 Dreamliner
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 9 operations of UAL3877

9
N38459BOEING Boeing 737-900
→
05/15/2026
1h 10m
No alerts
Replay Analysis
N16709BOEING Boeing 737-700
→
05/11/2026
2h 0m
No alerts
Replay Analysis
N17316BOEING Boeing 737 MAX 8
→
05/08/2026
49m
No alerts
Replay Analysis
N481UAAIRBUS Airbus A320
→
04/28/2026
1h 16m
△ Unstable
Replay Analysis
N24980BOEING Boeing 787-9 Dreamliner
→
04/28/2026
11h 52m
No alerts
Replay Analysis
N39461BOEING Boeing 737-900
→
04/23/2026
1h 22m
No alerts
Replay Analysis
N822UAAIRBUS Airbus A319
→
04/21/2026
1h 56m
No alerts
Replay Analysis
N28457BOEING Boeing 737-900
→
04/18/2026
2h 26m
No alerts
Replay Analysis
N24514AIRBUS Airbus A321 Neo
→
04/07/2026
2h 3m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window