UAL404 is operated by BANK OF UTAH TRUSTEE between San Antonio International Airport (KSAT) and George Bush Intercontinental Houston Airport (KIAH). The flight is most often flown by a BOEING Boeing 737 MAX 9. Typical block time is 1h 46m. SkyMeter has observed 163 legs of this flight number via ADS-B.

✈
FLIGHTS
163
last 90 days
⏱
AVG DURATION
1h 46m
tracked time
📅
SERVICE PERIOD
5/27/2025 → 8/12/2026
first → last seen
🗺
ROUTES / TYPES
6 / 6
city pairs · airframes
⚠
INCIDENT RATE
0.0%
0 flagged

Routes flown

By count · last 90 days

4
KSAT → KIAH
84
avg 46m · San Antonio → George Bush Intercontinental Houston
KIAH → KEWR
64
avg 3h 9m · George Bush Intercontinental Houston → Newark Liberty
KIAD → KEWR
1
avg 1h 3m · Washington Dulles → Newark Liberty
KIAH → KIAD
1
avg 3h 54m · George Bush Intercontinental Houston → Washington Dulles

Aircraft types

Equipment used on this number

6
B39M BOEING Boeing 737 MAX 9
109
A319 AIRBUS Airbus A319
93
B739 BOEING Boeing 737-900
27
B38M BOEING Boeing 737 MAX 8
7
A320 AIRBUS Airbus A320
2
B737 BOEING Boeing 737-700
1

Safety profile

Flagged flights · last 90 days

Go-arounds
0
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 UAL404

30
N17557BOEING Boeing 737 MAX 9
→
8/12/2026
3h 29m
No alerts
Replay Analysis
N27733BOEING Boeing 737-700
→
8/11/2026
33m
No alerts
Replay Analysis
N882UAAIRBUS Airbus A319
→
8/10/2026
41m
No alerts
Replay Analysis
N17405BOEING Boeing 737 MAX 9
→
8/10/2026
2h 53m
No alerts
Replay Analysis
N17405BOEING Boeing 737 MAX 9
→
8/9/2026
20m
No alerts
Replay Analysis
N17405BOEING Boeing 737 MAX 9
→
8/9/2026
3h 13m
No alerts
Replay Analysis
N851UAAIRBUS Airbus A319
→
8/9/2026
35m
No alerts
Replay Analysis
N17596BOEING Boeing 737 MAX 9
→
8/9/2026
2h 46m
No alerts
Replay Analysis
N17596BOEING Boeing 737 MAX 9
→
8/8/2026
28m
No alerts
Replay Analysis
N17596BOEING Boeing 737 MAX 9
→
8/8/2026
3h 14m
No alerts
Replay Analysis
N838UAAIRBUS Airbus A319
→
8/8/2026
39m
No alerts
Replay Analysis
N829UAAIRBUS Airbus A319
→
8/7/2026
37m
No alerts
Replay Analysis
N17593BOEING Boeing 737 MAX 9
→
8/7/2026
3h 6m
No alerts
Replay Analysis
N852UAAIRBUS Airbus A319
→
8/6/2026
1h 5m
No alerts
Replay Analysis
N17589BOEING Boeing 737 MAX 9
→
8/6/2026
3h 9m
No alerts
Replay Analysis
N17589BOEING Boeing 737 MAX 9
→
8/5/2026
3h 20m
No alerts
Replay Analysis
N17589BOEING Boeing 737 MAX 9
→
8/5/2026
10m
No alerts
Replay Analysis
N838UAAIRBUS Airbus A319
→
8/5/2026
39m
No alerts
Replay Analysis
N47517BOEING Boeing 737 MAX 9
→
8/5/2026
3h 8m
No alerts
Replay Analysis
N47517BOEING Boeing 737 MAX 9
→
8/4/2026
9m
No alerts
Replay Analysis
N47517BOEING Boeing 737 MAX 9
→
8/4/2026
3h 18m
No alerts
Replay Analysis
N829UAAIRBUS Airbus A319
→
8/4/2026
37m
No alerts
Replay Analysis
N77544BOEING Boeing 737 MAX 9
→
8/4/2026
3h 12m
No alerts
Replay Analysis
N807UAAIRBUS Airbus A319
→
8/3/2026
34m
No alerts
Replay Analysis
N17595BOEING Boeing 737 MAX 9
→
8/3/2026
2h 57m
No alerts
Replay Analysis
N17595BOEING Boeing 737 MAX 9
→
8/2/2026
14m
No alerts
Replay Analysis
N17595BOEING Boeing 737 MAX 9
→
8/2/2026
3h 12m
No alerts
Replay Analysis
N811UAAIRBUS Airbus A319
→
8/2/2026
41m
No alerts
Replay Analysis
N37531BOEING Boeing 737 MAX 9
→
8/1/2026
2h 47m
No alerts
Replay Analysis
N37531BOEING Boeing 737 MAX 9
→
7/31/2026
27m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window