SWA421 is operated by SOUTHWEST AIRLINES CO between Austin Bergstrom International Airport (KAUS) and Phoenix Sky Harbor International Airport (KPHX). The flight is most often flown by a BOEING Boeing 737 MAX 8. Typical block time is 1h 44m. SkyMeter has observed 95 legs of this flight number via ADS-B.

✈
FLIGHTS
95
last 90 days
⏱
AVG DURATION
1h 44m
tracked time
📅
SERVICE PERIOD
5/31/2025 → 8/12/2026
first → last seen
🗺
ROUTES / TYPES
18 / 4
city pairs · airframes
⚠
INCIDENT RATE
2.1%
2 flagged

Routes flown

By count · last 90 days

10
KAUS → KPHX
19
avg 2h 20m · Austin Bergstrom → Phoenix Sky Harbor
KBDL → KBWI
17
avg 1h 0m · Bradley → Baltimore/Washington International Thurgood Marshall
KMCO → KBWI
14
avg 1h 52m · Orlando → Baltimore/Washington International Thurgood Marshall
KABQ → KLAX
6
avg 2h 5m · Albuquerque International Sunport → Los Angeles
KMCI → KAUS
6
avg 1h 37m · Kansas City → Austin Bergstrom
CT35 → KBWI
4
avg 57m · Hamilton Standard Heliport → Baltimore/Washington International Thurgood Marshall
KLAS → KPIT
3
avg 4h 35m · McCarran → Pittsburgh
KDEN → KSMF
3
avg 2h 21m · Denver → Sacramento
CT50 → KBWI
3
avg 58m · Marks Heliport → Baltimore/Washington International Thurgood Marshall
4B9 → KBWI
1
avg 52m · Simsbury → Baltimore/Washington International Thurgood Marshall

Aircraft types

Equipment used on this number

4
B38M BOEING Boeing 737 MAX 8
41
B737 BOEING Boeing 737-700
37
B738 BOEING Boeing 737-800
22
NAVI NORTH AMERICAN-RYAN North American Navion
3

Safety profile

Flagged flights · last 90 days

Go-arounds
0
Unstable approach
2
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 SWA421

30
N8887QBOEING Boeing 737 MAX 8
→
8/12/2026
15m
No alerts
Replay Analysis
N8690ABOEING Boeing 737-800
→
8/12/2026
51m
No alerts
Replay Analysis
N8690ABOEING Boeing 737-800
→
8/11/2026
3h 3m
No alerts
Replay Analysis
N8690ABOEING Boeing 737-800
→
8/11/2026
23m
No alerts
Replay Analysis
N8690ABOEING Boeing 737-800
→
8/11/2026
4h 20m
No alerts
Replay Analysis
N8675ABOEING Boeing 737-800
→
8/10/2026
2h 12m
No alerts
Replay Analysis
N9003BNORTH AMERICAN-RYAN North American Navion
→
8/10/2026
1h 11m
No alerts
Replay Analysis
N9003BNORTH AMERICAN-RYAN North American Navion
→
8/9/2026
2h 8m
No alerts
Replay Analysis
N9003BNORTH AMERICAN-RYAN North American Navion
→
8/9/2026
56m
No alerts
Replay Analysis
N8608NBOEING Boeing 737-800
→
8/8/2026
3h 11m
No alerts
Replay Analysis
N8807LBOEING Boeing 737 MAX 8
→
8/8/2026
35m
No alerts
Replay Analysis
N8778QBOEING Boeing 737 MAX 8
→
8/7/2026
2h 43m
No alerts
Replay Analysis
N8663ABOEING Boeing 737-800
→
8/6/2026
2h 9m
No alerts
Replay Analysis
N8935QBOEING Boeing 737 MAX 8
→
8/6/2026
1h 41m
No alerts
Replay Analysis
N8935QBOEING Boeing 737 MAX 8
→
8/5/2026
2h 16m
No alerts
Replay Analysis
N8935QBOEING Boeing 737 MAX 8
→
8/5/2026
44m
No alerts
Replay Analysis
N8935QBOEING Boeing 737 MAX 8
→
8/5/2026
13m
No alerts
Replay Analysis
N8935QBOEING Boeing 737 MAX 8
→
8/5/2026
4h 59m
No alerts
Replay Analysis
N8724JBOEING Boeing 737 MAX 8
→
8/5/2026
26m
No alerts
Replay Analysis
N8724JBOEING Boeing 737 MAX 8
→
8/4/2026
3h 31m
No alerts
Replay Analysis
N8724JBOEING Boeing 737 MAX 8
→
8/4/2026
25m
No alerts
Replay Analysis
N8724JBOEING Boeing 737 MAX 8
→
8/4/2026
4h 26m
No alerts
Replay Analysis
N8861QBOEING Boeing 737 MAX 8
→
8/3/2026
52m
No alerts
Replay Analysis
N8882QBOEING Boeing 737 MAX 8
→
8/3/2026
1h 48m
No alerts
Replay Analysis
N8898LBOEING Boeing 737 MAX 8
→
7/31/2026
58m
No alerts
Replay Analysis
N8894QBOEING Boeing 737 MAX 8
→
7/30/2026
59m
No alerts
Replay Analysis
N8509UBOEING Boeing 737-800
→
7/30/2026
1h 46m
No alerts
Replay Analysis
N8637ABOEING Boeing 737-800
→
7/29/2026
1h 50m
No alerts
Replay Analysis
N8647ABOEING Boeing 737-800
→
7/27/2026
1h 5m
No alerts
Replay Analysis
N253WNBOEING Boeing 737-700
→
7/27/2026
2h 8m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window