SWA3877 is operated by SOUTHWEST AIRLINES CO between Phoenix Sky Harbor International Airport (KPHX) and San Antonio International Airport (KSAT). The flight is most often flown by a BOEING Boeing 737 MAX 8. Typical block time is 1h 54m. SkyMeter has observed 56 legs of this flight number via ADS-B.

✈
FLIGHTS
56
last 90 days
⏱
AVG DURATION
1h 54m
tracked time
📅
SERVICE PERIOD
04/11/2026 → 06/02/2026
first → last seen
🗺
ROUTES / TYPES
3 / 3
city pairs · airframes
⚠
INCIDENT RATE
14.3%
8 flagged

Routes flown

By count · last 90 days

2
KPHX → KSAT
36
avg 1h 53m · Phoenix Sky Harbor → San Antonio
KSFO → KPHX
17
avg 2h 8m · San Francisco → Phoenix Sky Harbor

Aircraft types

Equipment used on this number

3
B38M BOEING Boeing 737 MAX 8
39
B738 BOEING Boeing 737-800
9
B737 BOEING Boeing 737-700
8

Safety profile

Flagged flights · last 90 days

Go-arounds
0
Unstable approach
8
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 SWA3877

30
N8997QBOEING Boeing 737 MAX 8
→
06/02/2026
2h 12m
△ Unstable
Replay Analysis
N8997QBOEING Boeing 737 MAX 8
→
06/02/2026
1h 52m
No alerts
Replay Analysis
N907WNBOEING Boeing 737-700
→
06/01/2026
1h 51m
△ Unstable
Replay Analysis
N8507CBOEING Boeing 737-800
→
05/29/2026
1h 41m
No alerts
Replay Analysis
N8507CBOEING Boeing 737-800
→
05/29/2026
2h 22m
No alerts
Replay Analysis
N8533SBOEING Boeing 737-800
→
05/28/2026
1h 46m
No alerts
Replay Analysis
N8744BBOEING Boeing 737 MAX 8
→
05/26/2026
1h 43m
No alerts
Replay Analysis
N8744BBOEING Boeing 737 MAX 8
→
05/26/2026
5m
No alerts
Replay Analysis
N8744BBOEING Boeing 737 MAX 8
→
05/26/2026
1h 44m
No alerts
Replay Analysis
N8836QBOEING Boeing 737 MAX 8
→
05/25/2026
1h 45m
No alerts
Replay Analysis
N8571ZBOEING Boeing 737-800
→
05/24/2026
1h 47m
No alerts
Replay Analysis
N8982SBOEING Boeing 737 MAX 8
→
05/23/2026
1h 52m
No alerts
Replay Analysis
N8982SBOEING Boeing 737 MAX 8
→
05/23/2026
1h 57m
No alerts
Replay Analysis
N8923QBOEING Boeing 737 MAX 8
→
05/22/2026
1h 47m
No alerts
Replay Analysis
N8923QBOEING Boeing 737 MAX 8
→
05/22/2026
2h 18m
No alerts
Replay Analysis
N8578QBOEING Boeing 737-800
→
05/21/2026
1h 47m
No alerts
Replay Analysis
N7731ABOEING Boeing 737-700
→
05/18/2026
1h 48m
No alerts
Replay Analysis
N969WNBOEING Boeing 737-700
→
05/17/2026
1h 47m
No alerts
Replay Analysis
N8860SBOEING Boeing 737 MAX 8
→
05/15/2026
2h 4m
No alerts
Replay Analysis
N8860SBOEING Boeing 737 MAX 8
→
05/15/2026
1h 46m
No alerts
Replay Analysis
N8974KBOEING Boeing 737 MAX 8
→
05/14/2026
2h 11m
No alerts
Replay Analysis
N8951SBOEING Boeing 737 MAX 8
→
05/13/2026
2h 40m
No alerts
Replay Analysis
N7861JBOEING Boeing 737-700
→
05/11/2026
2h 2m
No alerts
Replay Analysis
N8923QBOEING Boeing 737 MAX 8
→
05/10/2026
2h 2m
No alerts
Replay Analysis
N8814KBOEING Boeing 737 MAX 8
→
05/08/2026
2h 6m
No alerts
Replay Analysis
N487WNBOEING Boeing 737-700
→
05/03/2026
1h 45m
No alerts
Replay Analysis
N8948QBOEING Boeing 737 MAX 8
→
05/02/2026
1h 49m
△ Unstable
Replay Analysis
N8948QBOEING Boeing 737 MAX 8
→
05/02/2026
2h 31m
No alerts
Replay Analysis
N8923QBOEING Boeing 737 MAX 8
→
05/01/2026
2h 13m
No alerts
Replay Analysis
N8923QBOEING Boeing 737 MAX 8
→
05/01/2026
1h 52m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window