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.

UNITED · FLIGHT UA 400 SCHEDULED · TYPICAL SCHEDULE

Sunday, October 4 Today

UA 400 · RIC → DEN

departs 4:12 PM ET · arrives 6:03 PM MT

Forecast issued Sun 1:00 PM ET · 3h before departure

UA 400 isn’t flying RIC → DEN today

This listing came from a typical schedule. According to the FAA, UA 400 flies these legs today:

SFO → AUS · 12:03 AM · landed
SFO → AUS · 12:09 AM · scheduled
SFO → AUS · 12:09 AM · scheduled