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 3870 SCHEDULED · TYPICAL SCHEDULE

Sunday, October 4 Tomorrow

WN 3870 · SNA → SMF

departs 2:25 PM PT · arrives 3:50 PM PT

Forecast issued Sat 3:00 PM ET · 26h before departure

WN 3870 isn’t flying SNA → SMF on Sun, Oct 4

This listing came from a typical schedule. According to the FAA, WN 3870 flies these legs that day:

COS → HOU · 11:45 AM · scheduled