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 4237 SCHEDULED · TYPICAL SCHEDULE

Wednesday, September 30 Today

WN 4237 · SFO → PHX

departs 11:30 AM PT · arrives 1:40 PM MT

Forecast issued Wed 6:00 AM ET · 8h before departure

WN 4237 isn’t flying SFO → PHX today

This listing came from a typical schedule. According to the FAA, WN 4237 flies these legs today:

LAS → SAN · 1:33 PM · scheduled