Schedule: a typical Wednesday (the flights of Jul 29, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.

SOUTHWEST · FLIGHT WN 3966 SCHEDULED · TYPICAL SCHEDULE

Wednesday, September 30 Today

WN 3966 · STL → PHL

departs 7:10 PM CT · arrives 10:25 PM ET

Forecast issued Wed 5:00 AM ET · 15h before departure

WN 3966 isn’t flying STL → PHL today

This listing came from a typical schedule. According to the FAA, WN 3966 flies these legs today:

BNA → BHM · 8:44 PM · scheduled