Flight Status & Tracker

SWA3856

SOUTHWEST AIRLINES CO · DEN → SEA · Last tracked Sep 24, 2026

SWA3856 is a flight number operated by SOUTHWEST AIRLINES CO between Denver International Airport (KDEN) and Seattle Tacoma International Airport (KSEA). SkyMeter last tracked SWA3856 on September 24, 2026. The flight is most often flown by a BOEING Boeing 737-700. Typical block time is 2h 39m. SkyMeter has observed 74 legs of this flight number via ADS-B.

SkyMeter tracks historical flight activity from ADS-B data — this is not a live gate-to-gate status feed.

✈
FLIGHTS
74
last 90 days
⏱
AVG DURATION
2h 39m
tracked time
📅
SERVICE PERIOD
6/6/2025 → 9/24/2026
first → last seen
🗺
ROUTES / TYPES
6 / 4
city pairs · airframes
⚠
INCIDENT RATE
1.4%
1 flagged

Routes flown

By count · last 90 days

3
KDEN → KSEA
34
avg 2h 42m · Denver → Seattle Tacoma
KLGA → KHOU
26
avg 3h 21m · 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
B737 BOEING Boeing 737-700
40
B738 BOEING Boeing 737-800
31
B38M BOEING Boeing 737 MAX 8
26
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
N7745ABOEING Boeing 737-700
→
9/24/2026
2h 16m
No alerts
Replay Analysis
N8705QBOEING Boeing 737 MAX 8
→
9/23/2026
3h 27m
No alerts
Replay Analysis
N8518RBOEING Boeing 737-800
→
9/22/2026
3h 31m
No alerts
Replay Analysis
N7750ABOEING Boeing 737-700
→
9/22/2026
2h 16m
No alerts
Replay Analysis
N7750ABOEING Boeing 737-700
→
9/22/2026
3h 33m
No alerts
Replay Analysis
N7750ABOEING Boeing 737-700
→
9/22/2026
1h 17m
No alerts
Replay Analysis
N476WNBOEING Boeing 737-700
→
9/19/2026
47m
No alerts
Replay Analysis
N476WNBOEING Boeing 737-700
→
9/18/2026
3h 24m
No alerts
Replay Analysis
N476WNBOEING Boeing 737-700
→
9/18/2026
2h 36m
No alerts
Replay Analysis
N8641BBOEING Boeing 737-800
→
9/18/2026
1h 1m
No alerts
Replay Analysis
N8641BBOEING Boeing 737-800
→
9/17/2026
2h 11m
No alerts
Replay Analysis
N8641BBOEING Boeing 737-800
→
9/17/2026
3h 13m
No alerts
Replay Analysis
N8772MBOEING Boeing 737 MAX 8
→
9/16/2026
2h 56m
No alerts
Replay Analysis
N8804LBOEING Boeing 737 MAX 8
→
9/15/2026
3h 4m
No alerts
Replay Analysis
N7747CBOEING Boeing 737-700
→
9/15/2026
1h 51m
No alerts
Replay Analysis
N7721EBOEING Boeing 737-700
→
9/12/2026
51m
No alerts
Replay Analysis
N289CTBOEING Boeing 737-700
→
9/11/2026
1h 1m
No alerts
Replay Analysis
N289CTBOEING Boeing 737-700
→
9/10/2026
3h 7m
No alerts
Replay Analysis
N289CTBOEING Boeing 737-700
→
9/10/2026
2h 6m
No alerts
Replay Analysis
N9017LBOEING Boeing 737 MAX 8
→
9/8/2026
2h 54m
No alerts
Replay Analysis
N209WNBOEING Boeing 737-700
→
9/8/2026
1h 4m
No alerts
Replay Analysis
N7861JBOEING Boeing 737-700
→
9/5/2026
54m
No alerts
Replay Analysis
N7861JBOEING Boeing 737-700
→
9/4/2026
2h 38m
No alerts
Replay Analysis
N7861JBOEING Boeing 737-700
→
9/4/2026
3h 33m
No alerts
Replay Analysis
N8639BBOEING Boeing 737-800
→
9/2/2026
3h 37m
No alerts
Replay Analysis
N9010TBOEING Boeing 737 MAX 8
→
9/1/2026
3h 44m
No alerts
Replay Analysis
N7741CBOEING Boeing 737-700
→
9/1/2026
40m
No alerts
Replay Analysis
N7741CBOEING Boeing 737-700
→
8/31/2026
3h 20m
No alerts
Replay Analysis
N7741CBOEING Boeing 737-700
→
8/31/2026
2h 40m
No alerts
Replay Analysis
N247WNBOEING Boeing 737-700
→
8/29/2026
1h 25m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window