How often is WN321 on time?

Across 11 flights on ISP → BWI from 2026-02-12 to 2026-03-01, WN321 arrived within 15 minutes of schedule 90% of the time. The median arrival delay was -15 min, and the worst 10% of flights arrived +1 min or later. 9% of flights were cancelled.

Delay distribution

Arrival delay for completed flights (excludes cancellations and diversions).

Performance by month

Performance by day of week

Other routes

• WN321 on AUS → LAS (27 flights)
• WN321 on SFO → DEN (58 flights)
• WN321 on MCO → PBI (23 flights)
• WN321 on CLT → MDW (5 flights)
• WN321 on MDW → DEN (5 flights)
• WN321 on DEN → SEA (5 flights)
• WN321 on PHX → SNA (19 flights)
• WN321 on MCO → ISP (3 flights)
• WN321 on HRL → HOU (60 flights)
• WN321 on LAS → SMF (1 flights)
• WN321 on LAS → STL (13 flights)
• WN321 on OAK → LAS (26 flights)
• WN321 on LAS → PHX (4 flights)
• WN321 on LAS → MCI (2 flights)
• WN321 on BWI → LAS (57 flights)
• WN321 on DEN → SFO (1 flights)
• WN321 on PIT → ATL (25 flights)
• WN321 on MHT → MCO (10 flights)

Related

• All Southwest Airlines flights on ISP → BWI
• Compare airlines on ISP → BWI
• Southwest Airlines on the return, BWI → ISP