How often is WN3978 on time?

Across 28 flights on MDW → PHL from 2026-03-05 to 2026-04-06, WN3978 arrived within 15 minutes of schedule 77% of the time. The median arrival delay was -2 min, and the worst 10% of flights arrived +37 min or later. 4% 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

• WN3978 on STL → SAT (12 flights)
• WN3978 on RDU → AUS (42 flights)
• WN3978 on MSY → MDW (20 flights)
• WN3978 on MDW → STL (5 flights)
• WN3978 on PHL → MCO (5 flights)
• WN3978 on PHL → TPA (8 flights)
• WN3978 on SAN → SMF (8 flights)
• WN3978 on ONT → DEN (17 flights)
• WN3978 on MCO → SJU (31 flights)
• WN3978 on PDX → BWI (58 flights)
• WN3978 on ATL → MDW (29 flights)
• WN3978 on SAN → PHX (5 flights)
• WN3978 on MDW → SAN (10 flights)

Related

• All Southwest Airlines flights on MDW → PHL
• Compare airlines on MDW → PHL
• Southwest Airlines on the return, PHL → MDW