UAL440 is operated by UNITED AIRLINES INC between Boise Air Terminal/Gowen Field (KBOI) and Chicago O'Hare International Airport (KORD). The flight is most often flown by a BOEING Boeing 737 MAX 9. Typical block time is 3h 2m. SkyMeter has observed 142 legs of this flight number via ADS-B.

✈
FLIGHTS
142
last 90 days
⏱
AVG DURATION
3h 2m
tracked time
📅
SERVICE PERIOD
05/27/2025 → 08/21/2026
first → last seen
🗺
ROUTES / TYPES
15 / 6
city pairs · airframes
⚠
INCIDENT RATE
1.4%
2 flagged

Routes flown

By count · last 90 days

10
KBOI → KORD
43
avg 3h 8m · Boise Air Terminal/Gowen Field → Chicago O'Hare
KBOS → KSFO
30
avg 6h 19m · General Edward Lawrence Logan → San Francisco
KORD → KBWI
30
avg 1h 33m · Chicago O'Hare → Baltimore/Washington International Thurgood Marshall
KAVL → KDEN
3
avg 3h 14m · Asheville → Denver
76IS → KBWI
1
avg 1h 20m · Steel Supply Heliport → Baltimore/Washington International Thurgood Marshall
KRFD → KORD
1
avg 33m · Chicago Rockford → Chicago O'Hare
IS12 → KORD
1
avg 19m · Urso Heliport → Chicago O'Hare
KDFW → KDEN
1
avg 2h 21m · Dallas Fort Worth → Denver
US-0370 → KSFO
1
avg 6h 30m · Cape Air Seaplanes on Boston Harbor Seaplane Base → San Francisco
9IS6 → KORD
1
avg 27m · Evanston Water Plant Heliport → Chicago O'Hare

Aircraft types

Equipment used on this number

6
B39M BOEING Boeing 737 MAX 9
95
B739 BOEING Boeing 737-900
75
B738 BOEING Boeing 737-800
21
A319 AIRBUS Airbus A319
14
A320 AIRBUS Airbus A320
11
B38M BOEING Boeing 737 MAX 8
5

Safety profile

Flagged flights · last 90 days

Go-arounds
0
Unstable approach
2
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 UAL440

30
N825UAAIRBUS Airbus A319
→
08/21/2026
3h 20m
No alerts
Replay Analysis
N823UAAIRBUS Airbus A319
→
08/19/2026
3h 21m
No alerts
Replay Analysis
N889UAAIRBUS Airbus A319
→
08/18/2026
3h 5m
No alerts
Replay Analysis
N873UAAIRBUS Airbus A319
→
08/17/2026
3h 7m
No alerts
Replay Analysis
N892UAAIRBUS Airbus A319
→
08/16/2026
3h 3m
No alerts
Replay Analysis
N458UAAIRBUS Airbus A320
→
08/15/2026
3h 24m
No alerts
Replay Analysis
N894UAAIRBUS Airbus A319
→
08/15/2026
2h 20m
No alerts
Replay Analysis
N894UAAIRBUS Airbus A319
→
08/14/2026
2h 49m
No alerts
Replay Analysis
N490UAAIRBUS Airbus A320
→
08/13/2026
2h 57m
No alerts
Replay Analysis
N852UAAIRBUS Airbus A319
→
08/11/2026
3h 3m
No alerts
Replay Analysis
N62849BOEING Boeing 737-900
→
08/11/2026
1h 31m
No alerts
Replay Analysis
N62849BOEING Boeing 737-900
→
08/10/2026
8m
No alerts
Replay Analysis
N69838BOEING Boeing 737-900
→
08/10/2026
3h 17m
No alerts
Replay Analysis
N24211BOEING Boeing 737-800
→
08/10/2026
19m
No alerts
Replay Analysis
N24211BOEING Boeing 737-800
→
08/09/2026
2h 44m
No alerts
Replay Analysis
N69840BOEING Boeing 737-900
→
08/09/2026
1h 23m
No alerts
Replay Analysis
N69840BOEING Boeing 737-900
→
08/08/2026
6m
No alerts
Replay Analysis
N12218BOEING Boeing 737-800
→
08/08/2026
3h 9m
No alerts
Replay Analysis
N17254BOEING Boeing 737 MAX 8
→
08/08/2026
1h 40m
No alerts
Replay Analysis
N37290BOEING Boeing 737-800
→
08/07/2026
3h 15m
No alerts
Replay Analysis
N17456BOEING Boeing 737 MAX 9
→
08/07/2026
1h 40m
No alerts
Replay Analysis
N37274BOEING Boeing 737-800
→
08/06/2026
8m
No alerts
Replay Analysis
N37274BOEING Boeing 737-800
→
08/06/2026
3h 25m
No alerts
Replay Analysis
N27205BOEING Boeing 737-800
→
08/05/2026
24m
No alerts
Replay Analysis
N27205BOEING Boeing 737-800
→
08/05/2026
12m
No alerts
Replay Analysis
N27205BOEING Boeing 737-800
→
08/05/2026
3h 1m
No alerts
Replay Analysis
N37422BOEING Boeing 737-900
→
08/05/2026
1h 25m
No alerts
Replay Analysis
N34460BOEING Boeing 737-900
→
08/04/2026
3h 10m
No alerts
Replay Analysis
N77430BOEING Boeing 737-900
→
08/04/2026
1h 24m
No alerts
Replay Analysis
N77430BOEING Boeing 737-900
→
08/03/2026
24m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window