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 10m. SkyMeter has observed 143 legs of this flight number via ADS-B.

✈
FLIGHTS
143
last 90 days
⏱
AVG DURATION
3h 10m
tracked time
📅
SERVICE PERIOD
5/27/2025 → 8/11/2026
first → last seen
🗺
ROUTES / TYPES
15 / 6
city pairs · airframes
⚠
INCIDENT RATE
2.8%
4 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
33
avg 6h 20m · General Edward Lawrence Logan → San Francisco
KORD → KBWI
30
avg 1h 33m · Chicago O'Hare → Baltimore/Washington International Thurgood Marshall
KFLL → KDEN
5
avg 4h 13m · Fort Lauderdale Hollywood → Denver
76IS → KBWI
1
avg 1h 20m · Steel Supply Heliport → Baltimore/Washington International Thurgood Marshall
KBOI → KRFD
1
avg 3h 24m · Boise Air Terminal/Gowen Field → Chicago Rockford
KRFD → KORD
1
avg 33m · Chicago Rockford → Chicago O'Hare
9IS6 → KORD
1
avg 27m · Evanston Water Plant Heliport → Chicago O'Hare
IS12 → KORD
1
avg 19m · Urso Heliport → Chicago O'Hare
US-0568 → KSFO
1
avg 5h 57m · Tailwind Boston Seaplane Base → San Francisco

Aircraft types

Equipment used on this number

6
B39M BOEING Boeing 737 MAX 9
109
B739 BOEING Boeing 737-900
76
B738 BOEING Boeing 737-800
21
A320 AIRBUS Airbus A320
9
A319 AIRBUS Airbus A319
7
B38M BOEING Boeing 737 MAX 8
5

Safety profile

Flagged flights · last 90 days

Go-arounds
2
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
N852UAAIRBUS Airbus A319
→
8/11/2026
3h 3m
No alerts
Replay Analysis
N62849BOEING Boeing 737-900
→
8/11/2026
1h 31m
No alerts
Replay Analysis
N62849BOEING Boeing 737-900
→
8/10/2026
8m
No alerts
Replay Analysis
N69838BOEING Boeing 737-900
→
8/10/2026
3h 17m
No alerts
Replay Analysis
N24211BOEING Boeing 737-800
→
8/10/2026
19m
No alerts
Replay Analysis
N24211BOEING Boeing 737-800
→
8/9/2026
2h 44m
No alerts
Replay Analysis
N69840BOEING Boeing 737-900
→
8/9/2026
1h 23m
No alerts
Replay Analysis
N69840BOEING Boeing 737-900
→
8/8/2026
6m
No alerts
Replay Analysis
N12218BOEING Boeing 737-800
→
8/8/2026
3h 9m
No alerts
Replay Analysis
N17254BOEING Boeing 737 MAX 8
→
8/8/2026
1h 40m
No alerts
Replay Analysis
N37290BOEING Boeing 737-800
→
8/7/2026
3h 15m
No alerts
Replay Analysis
N17456BOEING Boeing 737 MAX 9
→
8/7/2026
1h 40m
No alerts
Replay Analysis
N37274BOEING Boeing 737-800
→
8/6/2026
8m
No alerts
Replay Analysis
N37274BOEING Boeing 737-800
→
8/6/2026
3h 25m
No alerts
Replay Analysis
N27205BOEING Boeing 737-800
→
8/5/2026
24m
No alerts
Replay Analysis
N27205BOEING Boeing 737-800
→
8/5/2026
12m
No alerts
Replay Analysis
N27205BOEING Boeing 737-800
→
8/5/2026
3h 1m
No alerts
Replay Analysis
N37422BOEING Boeing 737-900
→
8/5/2026
1h 25m
No alerts
Replay Analysis
N34460BOEING Boeing 737-900
→
8/4/2026
3h 10m
No alerts
Replay Analysis
N77430BOEING Boeing 737-900
→
8/4/2026
1h 24m
No alerts
Replay Analysis
N77430BOEING Boeing 737-900
→
8/3/2026
24m
No alerts
Replay Analysis
N77430BOEING Boeing 737-900
→
8/3/2026
1h 49m
No alerts
Replay Analysis
N76515BOEING Boeing 737-800
→
8/3/2026
3h 3m
No alerts
Replay Analysis
N76515BOEING Boeing 737-800
→
8/3/2026
1h 30m
No alerts
Replay Analysis
N76515BOEING Boeing 737-800
→
8/2/2026
15m
No alerts
Replay Analysis
N77535BOEING Boeing 737-800
→
8/2/2026
3h 8m
No alerts
Replay Analysis
N73291BOEING Boeing 737-800
→
8/1/2026
48m
No alerts
Replay Analysis
N34222BOEING Boeing 737-800
→
7/31/2026
3h 8m
No alerts
Replay Analysis
N37413BOEING Boeing 737-900
→
7/30/2026
3h 4m
No alerts
Replay Analysis
N38479BOEING Boeing 737-900
→
7/30/2026
1h 40m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window