Flight Status & Tracker

SWA4021

SOUTHWEST AIRLINES CO · SMF → SLC · Last tracked Oct 18, 2026

SWA4021 is a flight number operated by SOUTHWEST AIRLINES CO between Sacramento International Airport (KSMF) and Salt Lake City International Airport (KSLC). SkyMeter last tracked SWA4021 on October 18, 2026. The flight is most often flown by a BOEING Boeing 737-700. Typical block time is 1h 54m. SkyMeter has observed 40 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
40
last 90 days
⏱
AVG DURATION
1h 54m
tracked time
📅
SERVICE PERIOD
5/31/2025 → 10/18/2026
first → last seen
🗺
ROUTES / TYPES
18 / 3
city pairs · airframes
⚠
INCIDENT RATE
0.0%
0 flagged

Routes flown

By count · last 90 days

10
KSMF → KSLC
6
avg 1h 42m · Sacramento → Salt Lake City
KDAL → KLGA
5
avg 3h 18m · Dallas Love Field → La Guardia
KSNA → KSMF
4
avg 1h 16m · John Wayne Airport-Orange County → Sacramento
KBHM → KMDW
4
avg 1h 24m · Birmingham-Shuttlesworth → Chicago Midway
KDEN → KBHM
4
avg 2h 29m · Denver → Birmingham-Shuttlesworth
KDEN → KHOU
3
avg 2h 21m · Denver → William P Hobby
KDEN → KMKE
2
avg 2h 25m · Denver → General Mitchell
KONT → KSMF
2
avg 1h 5m · Ontario → Sacramento
KFLL → KBNA
1
avg 2h 8m · Fort Lauderdale Hollywood → Nashville
KDAL → KMCI
1
avg 1h 17m · Dallas Love Field → Kansas City

Aircraft types

Equipment used on this number

3
B737 BOEING Boeing 737-700
41
B38M BOEING Boeing 737 MAX 8
16
B738 BOEING Boeing 737-800
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 SWA4021

30
N969WNBOEING Boeing 737-700
→
10/18/2026
1h 12m
No alerts
Replay Analysis
N475WNBOEING Boeing 737-700
→
10/18/2026
24m
No alerts
Replay Analysis
N931WNBOEING Boeing 737-700
→
10/16/2026
1h 52m
No alerts
Replay Analysis
N429WNBOEING Boeing 737-700
→
10/15/2026
1h 46m
No alerts
Replay Analysis
N8927QBOEING Boeing 737 MAX 8
→
10/15/2026
1h 20m
No alerts
Replay Analysis
N451WNBOEING Boeing 737-700
→
10/11/2026
57m
No alerts
Replay Analysis
N902WNBOEING Boeing 737-700
→
10/11/2026
50m
No alerts
Replay Analysis
N242WNBOEING Boeing 737-700
→
10/9/2026
1h 26m
No alerts
Replay Analysis
N7879ABOEING Boeing 737-700
→
10/8/2026
1h 53m
No alerts
Replay Analysis
N8950LBOEING Boeing 737 MAX 8
→
10/8/2026
1h 17m
No alerts
Replay Analysis
N8977GBOEING Boeing 737 MAX 8
→
10/7/2026
51m
No alerts
Replay Analysis
N8977GBOEING Boeing 737 MAX 8
→
10/7/2026
1h 17m
No alerts
Replay Analysis
N8977GBOEING Boeing 737 MAX 8
→
10/7/2026
25m
No alerts
Replay Analysis
N944WNBOEING Boeing 737-700
→
10/5/2026
1h 45m
No alerts
Replay Analysis
N218WNBOEING Boeing 737-700
→
10/4/2026
1h 9m
No alerts
Replay Analysis
N218WNBOEING Boeing 737-700
→
10/4/2026
27m
No alerts
Replay Analysis
N963WNBOEING Boeing 737-700
→
10/4/2026
20m
No alerts
Replay Analysis
N963WNBOEING Boeing 737-700
→
10/4/2026
50m
No alerts
Replay Analysis
N963WNBOEING Boeing 737-700
→
10/4/2026
1h 11m
No alerts
Replay Analysis
N7828ABOEING Boeing 737-700
→
10/2/2026
1h 26m
No alerts
Replay Analysis
N7881ABOEING Boeing 737-700
→
10/1/2026
1h 30m
No alerts
Replay Analysis
N469WNBOEING Boeing 737-700
→
9/20/2026
1h 24m
No alerts
Replay Analysis
N469WNBOEING Boeing 737-700
→
9/20/2026
2h 55m
No alerts
Replay Analysis
N927WNBOEING Boeing 737-700
→
8/30/2026
1h 26m
No alerts
Replay Analysis
N927WNBOEING Boeing 737-700
→
8/30/2026
2h 19m
No alerts
Replay Analysis
N7823ABOEING Boeing 737-700
→
8/23/2026
1h 25m
No alerts
Replay Analysis
N7823ABOEING Boeing 737-700
→
8/23/2026
2h 12m
No alerts
Replay Analysis
N253WNBOEING Boeing 737-700
→
8/16/2026
1h 21m
No alerts
Replay Analysis
N253WNBOEING Boeing 737-700
→
8/16/2026
2h 28m
No alerts
Replay Analysis
N494WNBOEING Boeing 737-700
→
8/10/2026
1h 52m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window