SWA421 is operated by SOUTHWEST AIRLINES CO between Bradley International Airport (KBDL) and Baltimore/Washington International Thurgood Marshall Airport (KBWI). The flight is most often flown by a BOEING Boeing 737 MAX 8. Typical block time is 1h 45m. SkyMeter has observed 89 legs of this flight number via ADS-B.

✈
FLIGHTS
89
last 90 days
⏱
AVG DURATION
1h 45m
tracked time
📅
SERVICE PERIOD
05/31/2025 → 08/22/2026
first → last seen
🗺
ROUTES / TYPES
18 / 4
city pairs · airframes
⚠
INCIDENT RATE
1.1%
1 flagged

Routes flown

By count · last 90 days

10
KBDL → KBWI
17
avg 1h 0m · Bradley → Baltimore/Washington International Thurgood Marshall
KMCO → KBWI
14
avg 1h 52m · Orlando → Baltimore/Washington International Thurgood Marshall
KAUS → KPHX
10
avg 2h 21m · Austin Bergstrom → Phoenix Sky Harbor
KDEN → KSMF
6
avg 2h 24m · Denver → Sacramento
KABQ → KLAX
6
avg 2h 5m · Albuquerque International Sunport → Los Angeles
CT35 → KBWI
4
avg 57m · Hamilton Standard Heliport → Baltimore/Washington International Thurgood Marshall
KMCI → KAUS
4
avg 1h 33m · Kansas City → Austin Bergstrom
CT50 → KBWI
3
avg 58m · Marks Heliport → Baltimore/Washington International Thurgood Marshall
KLAS → KPIT
3
avg 4h 35m · McCarran → Pittsburgh
KDEN → KJAX
2
avg 3h 7m · Denver → Jacksonville

Aircraft types

Equipment used on this number

4
B38M BOEING Boeing 737 MAX 8
45
B737 BOEING Boeing 737-700
27
B738 BOEING Boeing 737-800
24
NAVI NORTH AMERICAN-RYAN North American Navion
3

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 SWA421

30
N8971LBOEING Boeing 737 MAX 8
→
08/22/2026
3h 3m
No alerts
Replay Analysis
N8814KBOEING Boeing 737 MAX 8
→
08/18/2026
3h 13m
No alerts
Replay Analysis
N8814KBOEING Boeing 737 MAX 8
→
08/18/2026
44m
No alerts
Replay Analysis
N8716BBOEING Boeing 737 MAX 8
→
08/17/2026
2h 46m
No alerts
Replay Analysis
N8757LBOEING Boeing 737 MAX 8
→
08/17/2026
1h 54m
No alerts
Replay Analysis
N8757LBOEING Boeing 737 MAX 8
→
08/16/2026
2h 15m
No alerts
Replay Analysis
N8757LBOEING Boeing 737 MAX 8
→
08/16/2026
20m
No alerts
Replay Analysis
N8555ZBOEING Boeing 737-800
→
08/15/2026
2h 56m
No alerts
Replay Analysis
N8650FBOEING Boeing 737-800
→
08/14/2026
2h 15m
No alerts
Replay Analysis
N8886CBOEING Boeing 737 MAX 8
→
08/13/2026
2h 20m
No alerts
Replay Analysis
N8887QBOEING Boeing 737 MAX 8
→
08/12/2026
15m
No alerts
Replay Analysis
N8690ABOEING Boeing 737-800
→
08/12/2026
51m
No alerts
Replay Analysis
N8690ABOEING Boeing 737-800
→
08/11/2026
3h 3m
No alerts
Replay Analysis
N8690ABOEING Boeing 737-800
→
08/11/2026
23m
No alerts
Replay Analysis
N8690ABOEING Boeing 737-800
→
08/11/2026
4h 20m
No alerts
Replay Analysis
N8675ABOEING Boeing 737-800
→
08/10/2026
2h 12m
No alerts
Replay Analysis
N9003BNORTH AMERICAN-RYAN North American Navion
→
08/10/2026
1h 11m
No alerts
Replay Analysis
N9003BNORTH AMERICAN-RYAN North American Navion
→
08/09/2026
2h 8m
No alerts
Replay Analysis
N9003BNORTH AMERICAN-RYAN North American Navion
→
08/09/2026
56m
No alerts
Replay Analysis
N8608NBOEING Boeing 737-800
→
08/08/2026
3h 11m
No alerts
Replay Analysis
N8807LBOEING Boeing 737 MAX 8
→
08/08/2026
35m
No alerts
Replay Analysis
N8778QBOEING Boeing 737 MAX 8
→
08/07/2026
2h 43m
No alerts
Replay Analysis
N8663ABOEING Boeing 737-800
→
08/06/2026
2h 9m
No alerts
Replay Analysis
N8935QBOEING Boeing 737 MAX 8
→
08/06/2026
1h 41m
No alerts
Replay Analysis
N8935QBOEING Boeing 737 MAX 8
→
08/05/2026
2h 16m
No alerts
Replay Analysis
N8935QBOEING Boeing 737 MAX 8
→
08/05/2026
44m
No alerts
Replay Analysis
N8935QBOEING Boeing 737 MAX 8
→
08/05/2026
4h 59m
No alerts
Replay Analysis
N8935QBOEING Boeing 737 MAX 8
→
08/05/2026
13m
No alerts
Replay Analysis
N8724JBOEING Boeing 737 MAX 8
→
08/05/2026
26m
No alerts
Replay Analysis
N8724JBOEING Boeing 737 MAX 8
→
08/04/2026
3h 31m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window