SWA3856 is operated by SOUTHWEST AIRLINES CO between Denver International Airport (KDEN) and Seattle Tacoma International Airport (KSEA). The flight is most often flown by a BOEING Boeing 737 MAX 8. Typical block time is 2h 33m. SkyMeter has observed 89 legs of this flight number via ADS-B.

✈
FLIGHTS
89
last 90 days
⏱
AVG DURATION
2h 33m
tracked time
📅
SERVICE PERIOD
06/06/2025 → 09/01/2026
first → last seen
🗺
ROUTES / TYPES
5 / 4
city pairs · airframes
⚠
INCIDENT RATE
1.1%
1 flagged

Routes flown

By count · last 90 days

3
KDEN → KSEA
57
avg 2h 43m · Denver → Seattle Tacoma
KLGA → KHOU
15
avg 3h 23m · La Guardia → William P Hobby
KLGA → KIAH
1
avg 3h 18m · La Guardia → George Bush Intercontinental Houston

Aircraft types

Equipment used on this number

4
B38M BOEING Boeing 737 MAX 8
37
B738 BOEING Boeing 737-800
37
B737 BOEING Boeing 737-700
28
NAVI NORTH AMERICAN-RYAN North American Navion
1

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 SWA3856

30
N9010TBOEING Boeing 737 MAX 8
→
09/01/2026
3h 44m
No alerts
Replay Analysis
N7741CBOEING Boeing 737-700
→
09/01/2026
40m
No alerts
Replay Analysis
N7741CBOEING Boeing 737-700
→
08/31/2026
3h 20m
No alerts
Replay Analysis
N7741CBOEING Boeing 737-700
→
08/31/2026
2h 40m
No alerts
Replay Analysis
N247WNBOEING Boeing 737-700
→
08/29/2026
1h 25m
No alerts
Replay Analysis
N247WNBOEING Boeing 737-700
→
08/28/2026
4h 6m
No alerts
Replay Analysis
N247WNBOEING Boeing 737-700
→
08/28/2026
2h 40m
No alerts
Replay Analysis
N8744BBOEING Boeing 737 MAX 8
→
08/26/2026
3h 9m
No alerts
Replay Analysis
N8322XBOEING Boeing 737-800
→
08/25/2026
3h 17m
↘ Diverted (inferred)
Replay Analysis
N7876ABOEING Boeing 737-700
→
08/25/2026
44m
No alerts
Replay Analysis
N7876ABOEING Boeing 737-700
→
08/24/2026
3h 15m
No alerts
Replay Analysis
N7876ABOEING Boeing 737-700
→
08/24/2026
2h 31m
No alerts
Replay Analysis
N291WNBOEING Boeing 737-700
→
08/22/2026
1h 9m
No alerts
Replay Analysis
N291WNBOEING Boeing 737-700
→
08/21/2026
3h 43m
No alerts
Replay Analysis
N291WNBOEING Boeing 737-700
→
08/21/2026
2h 34m
No alerts
Replay Analysis
N8934QBOEING Boeing 737 MAX 8
→
08/19/2026
2h 30m
No alerts
Replay Analysis
N8675ABOEING Boeing 737-800
→
08/18/2026
3h 1m
No alerts
Replay Analysis
N8575ZBOEING Boeing 737-800
→
08/18/2026
1h 25m
No alerts
Replay Analysis
N8575ZBOEING Boeing 737-800
→
08/17/2026
3h 59m
No alerts
Replay Analysis
N8575ZBOEING Boeing 737-800
→
08/17/2026
2h 33m
No alerts
Replay Analysis
N212WNBOEING Boeing 737-700
→
08/15/2026
1h 25m
No alerts
Replay Analysis
N212WNBOEING Boeing 737-700
→
08/14/2026
1h 55m
No alerts
Replay Analysis
N212WNBOEING Boeing 737-700
→
08/14/2026
3h 21m
No alerts
Replay Analysis
N925WNBOEING Boeing 737-700
→
08/14/2026
1h 11m
No alerts
Replay Analysis
N925WNBOEING Boeing 737-700
→
08/13/2026
3h 13m
No alerts
Replay Analysis
N925WNBOEING Boeing 737-700
→
08/13/2026
2h 1m
No alerts
Replay Analysis
N8721JBOEING Boeing 737 MAX 8
→
08/12/2026
3h 9m
No alerts
Replay Analysis
N8738KBOEING Boeing 737 MAX 8
→
08/11/2026
3h 13m
No alerts
Replay Analysis
N7873ABOEING Boeing 737-700
→
08/11/2026
3h 6m
No alerts
Replay Analysis
N8512UBOEING Boeing 737-800
→
08/05/2026
3h 11m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window