Schedule: a typical summer Sunday (the flights of Jul 26, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.

SOUTHWEST · FLIGHT WN 4421 SCHEDULED · TYPICAL SCHEDULE

Sunday, October 4 Today

WN 4421 · OAK → ONT

departs 6:50 AM PT · arrives 8:10 AM PT

Forecast issued Sun 7:00 AM ET · 3h before departure

WN 4421 isn’t flying OAK → ONT today

This listing came from a typical schedule. According to the FAA, WN 4421 flies these legs today:

DEN → BOI · 7:45 PM · scheduled
DEN → BOI · 7:55 PM · landed
DEN → BOI · 9:10 PM · scheduled