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 3644 SCHEDULED · TYPICAL SCHEDULE

Wednesday, September 30 Today

WN 3644 · SFO → LAS

departs 2:15 PM PT · arrives 3:55 PM PT

Forecast issued Wed 8:00 AM ET · 9h before departure

WN 3644 isn’t flying SFO → LAS today

This listing came from a typical schedule. According to the FAA, WN 3644 flies these legs today:

SAT → BNA · 11:00 AM · scheduled
BNA → LGA · 1:52 PM · scheduled