UAL323 is operated by UNITED AIRLINES INC between General Edward Lawrence Logan International Airport (KBOS) and San Francisco International Airport (KSFO). The flight is most often flown by a BOEING Boeing 737-800. Typical block time is 4h 23m. SkyMeter has observed 94 legs of this flight number via ADS-B.

✈
FLIGHTS
94
last 90 days
⏱
AVG DURATION
4h 23m
tracked time
📅
SERVICE PERIOD
05/27/2025 → 08/18/2026
first → last seen
🗺
ROUTES / TYPES
11 / 3
city pairs · airframes
⚠
INCIDENT RATE
1.1%
1 flagged

Routes flown

By count · last 90 days

5
KBOS → KSFO
44
avg 5h 59m · General Edward Lawrence Logan → San Francisco
KBTV → KDEN
23
avg 3h 57m · Burlington → Denver
KBUF → KORD
7
avg 1h 30m · Buffalo Niagara → Chicago O'Hare
KBTV → KORD
1
avg 3h 5m · Burlington → Chicago O'Hare
KORD → KDEN
1
avg 2h 24m · Chicago O'Hare → Denver

Aircraft types

Equipment used on this number

3
B738 BOEING Boeing 737-800
60
B39M BOEING Boeing 737 MAX 9
47
B739 BOEING Boeing 737-900
3

Safety profile

Flagged flights · last 90 days

Go-arounds
1
Unstable approach
0
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 UAL323

30
N75436BOEING Boeing 737-900
→
08/18/2026
1h 21m
No alerts
Replay Analysis
N36207BOEING Boeing 737-800
→
08/17/2026
1h 24m
No alerts
Replay Analysis
N17583BOEING Boeing 737 MAX 9
→
08/16/2026
1h 32m
No alerts
Replay Analysis
N37502BOEING Boeing 737 MAX 9
→
08/15/2026
1h 31m
No alerts
Replay Analysis
N14240BOEING Boeing 737-800
→
08/14/2026
17m
No alerts
Replay Analysis
N14240BOEING Boeing 737-800
→
08/14/2026
8m
No alerts
Replay Analysis
N14240BOEING Boeing 737-800
→
08/14/2026
1h 21m
No alerts
Replay Analysis
N76269BOEING Boeing 737-800
→
08/13/2026
1h 38m
No alerts
Replay Analysis
N24224BOEING Boeing 737-800
→
08/12/2026
1h 15m
No alerts
Replay Analysis
N33286BOEING Boeing 737-800
→
08/11/2026
1h 40m
No alerts
Replay Analysis
N17593BOEING Boeing 737 MAX 9
→
08/10/2026
6h 28m
No alerts
Replay Analysis
N77590BOEING Boeing 737 MAX 9
→
08/09/2026
28m
No alerts
Replay Analysis
N17459BOEING Boeing 737 MAX 9
→
08/08/2026
5h 58m
No alerts
Replay Analysis
N17410BOEING Boeing 737 MAX 9
→
08/07/2026
6h 0m
No alerts
Replay Analysis
N77572BOEING Boeing 737 MAX 9
→
08/06/2026
6h 8m
No alerts
Replay Analysis
N17406BOEING Boeing 737 MAX 9
→
08/05/2026
6h 23m
No alerts
Replay Analysis
N17458BOEING Boeing 737 MAX 9
→
08/04/2026
5h 47m
No alerts
Replay Analysis
N77598BOEING Boeing 737 MAX 9
→
08/03/2026
6h 13m
No alerts
Replay Analysis
N17405BOEING Boeing 737 MAX 9
→
08/02/2026
5h 51m
No alerts
Replay Analysis
N37513BOEING Boeing 737 MAX 9
→
08/01/2026
5h 21m
No alerts
Replay Analysis
N17433BOEING Boeing 737 MAX 9
→
07/31/2026
5h 59m
No alerts
Replay Analysis
N47412BOEING Boeing 737 MAX 9
→
07/30/2026
5h 47m
No alerts
Replay Analysis
N47462BOEING Boeing 737 MAX 9
→
07/29/2026
5h 59m
No alerts
Replay Analysis
N17597BOEING Boeing 737 MAX 9
→
07/28/2026
6h 18m
No alerts
Replay Analysis
N37447BOEING Boeing 737 MAX 9
→
07/27/2026
6h 5m
No alerts
Replay Analysis
N17410BOEING Boeing 737 MAX 9
→
07/26/2026
5h 52m
No alerts
Replay Analysis
N27503BOEING Boeing 737 MAX 9
→
07/25/2026
5h 51m
No alerts
Replay Analysis
N87442BOEING Boeing 737 MAX 9
→
07/24/2026
6h 29m
No alerts
Replay Analysis
N17410BOEING Boeing 737 MAX 9
→
07/23/2026
5h 54m
No alerts
Replay Analysis
N66841BOEING Boeing 737-900
→
07/22/2026
6h 17m
↻ Go-around
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window