SWA3912 is operated by SOUTHWEST AIRLINES CO between St Louis Lambert International Airport (KSTL) and Denver International Airport (KDEN). The flight is most often flown by a BOEING Boeing 737 MAX 8. Typical block time is 1h 50m. SkyMeter has observed 76 legs of this flight number via ADS-B.

✈
FLIGHTS
76
last 90 days
⏱
AVG DURATION
1h 50m
tracked time
📅
SERVICE PERIOD
5/27/2025 → 9/8/2026
first → last seen
🗺
ROUTES / TYPES
18 / 4
city pairs · airframes
⚠
INCIDENT RATE
1.3%
1 flagged

Routes flown

By count · last 90 days

10
KSTL → KDEN
31
avg 1h 59m · St Louis Lambert → Denver
KECP → KSTL
11
avg 1h 33m · Northwest Florida Beaches → St Louis Lambert
KSTL → KSMF
3
avg 3h 48m · St Louis Lambert → Sacramento
KTPA → KBNA
2
avg 1h 45m · Tampa → Nashville
KSTL → KCOS
1
avg 2h 36m · St Louis Lambert → City of Colorado Springs
KSTL → KABQ
1
avg 3h 0m · St Louis Lambert → Albuquerque International Sunport
KTPF → KBNA
1
avg 2h 9m · Peter O Knight → Nashville
KECP → KCPS
1
avg 1h 26m · Northwest Florida Beaches → St Louis Downtown
KCOS → KDEN
1
avg 1h 20m · City of Colorado Springs → Denver
0CD4 → KDEN
1
avg 15m · Kauffman Heliport → Denver

Aircraft types

Equipment used on this number

4
B38M BOEING Boeing 737 MAX 8
37
B737 BOEING Boeing 737-700
35
B738 BOEING Boeing 737-800
31
NAVI NORTH AMERICAN-RYAN North American Navion
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 30 operations of SWA3912

30
N903WNBOEING Boeing 737-700
→
9/8/2026
1h 32m
No alerts
Replay Analysis
N453WNBOEING Boeing 737-700
→
9/4/2026
1h 5m
No alerts
Replay Analysis
N220WNBOEING Boeing 737-700
→
9/3/2026
1h 27m
No alerts
Replay Analysis
N570WNBOEING Boeing 737-700
→
8/31/2026
1h 24m
No alerts
Replay Analysis
N8812QBOEING Boeing 737 MAX 8
→
8/31/2026
1h 51m
No alerts
Replay Analysis
N956WNBOEING Boeing 737-700
→
8/28/2026
1h 29m
No alerts
Replay Analysis
N436WNBOEING Boeing 737-700
→
8/27/2026
1h 24m
No alerts
Replay Analysis
N482WNBOEING Boeing 737-700
→
8/24/2026
1h 35m
No alerts
Replay Analysis
N8822QBOEING Boeing 737 MAX 8
→
8/24/2026
1h 29m
No alerts
Replay Analysis
N8822QBOEING Boeing 737 MAX 8
→
8/23/2026
17m
No alerts
Replay Analysis
N442WNBOEING Boeing 737-700
→
8/21/2026
1h 32m
No alerts
Replay Analysis
N447WNBOEING Boeing 737-700
→
8/21/2026
10m
No alerts
Replay Analysis
N447WNBOEING Boeing 737-700
→
8/20/2026
1h 31m
No alerts
Replay Analysis
N447WNBOEING Boeing 737-700
→
8/20/2026
1h 20m
No alerts
Replay Analysis
N226WNBOEING Boeing 737-700
→
8/17/2026
1h 26m
△ Low approach-stability score↘ Diverted (inferred)
Replay Analysis
N8552ZBOEING Boeing 737-800
→
8/17/2026
1h 38m
No alerts
Replay Analysis
N441WNBOEING Boeing 737-700
→
8/15/2026
1h 4m
No alerts
Replay Analysis
N441WNBOEING Boeing 737-700
→
8/14/2026
2h 19m
No alerts
Replay Analysis
N441WNBOEING Boeing 737-700
→
8/14/2026
1h 14m
No alerts
Replay Analysis
N7847ABOEING Boeing 737-700
→
8/13/2026
1h 27m
No alerts
Replay Analysis
N7742BBOEING Boeing 737-700
→
8/11/2026
49m
No alerts
Replay Analysis
N7742BBOEING Boeing 737-700
→
8/10/2026
41m
No alerts
Replay Analysis
N7742BBOEING Boeing 737-700
→
8/10/2026
1h 30m
No alerts
Replay Analysis
N8746QBOEING Boeing 737 MAX 8
→
8/10/2026
2h 8m
No alerts
Replay Analysis
N467WNBOEING Boeing 737-700
→
8/8/2026
21m
No alerts
Replay Analysis
N467WNBOEING Boeing 737-700
→
8/7/2026
1h 3m
No alerts
Replay Analysis
N467WNBOEING Boeing 737-700
→
8/7/2026
1h 25m
No alerts
Replay Analysis
N8553WBOEING Boeing 737-800
→
8/3/2026
2h 24m
No alerts
Replay Analysis
N8876QBOEING Boeing 737 MAX 8
→
8/2/2026
1h 50m
No alerts
Replay Analysis
N9003BNORTH AMERICAN-RYAN North American Navion
→
7/31/2026
2h 5m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window