Southwest Airlines
WN4321Baltimore to Islip
Southwest Airlines flight WN4321 flies from Baltimore (BWI) to Islip (ISP), 353 km. Over November 2025 to July 2026 it usually arrives about 12 minutes late: 70% of 141 flights arrived within 15 minutes of schedule and 5.7% were cancelled (US Department of Transportation data).
On-time record, last 12 months
70%
on time (within 15 min)
17%
more than 30 min late
5.7%
cancelled
+12 min
average arrival vs schedule
Every operation of WN4321, November 2025 to July 2026: 141 flights. Source: US Bureau of Transportation Statistics, public domain.
Routes flown as WN4321
- Baltimore (BWI) to Islip (ISP)57 flights
- Sacramento (SMF) to Burbank (BUR)46 flights
- Santa Ana (SNA) to Nashville (BNA)13 flights
- Baltimore (BWI) to Miami (MIA)11 flights
- Fort Lauderdale Hollywood (FLL) to Chicago Midway (MDW)5 flights
- Fort Lauderdale Hollywood (FLL) to Las Vegas (LAS)5 flights
- Miami (MIA) to Austin Bergstrom (AUS)3 flights
- Spokane (GEG) to Sacramento (SMF)1 flights
Other flights from Baltimore to Islip
More about Baltimore (BWI) and Islip (ISP).
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