Schedule: a typical summer Thursday (the flights of Jul 30, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.

UNITED · FLIGHT UA 644 SCHEDULED · TYPICAL SCHEDULE

Thursday, October 1 Yesterday

UA 644 · DFW → DEN

departs 8:45 AM CT · arrives 10:06 AM MT

Forecast issued Thu 10:00 PM ET · 12h after departure

UA 644 isn’t flying DFW → DEN on Thu, Oct 1

This listing came from a typical schedule. According to the FAA, UA 644 flies these legs that day:

LGA → DEN · 7:40 AM · scheduled
DEN → PDX · 11:40 AM · scheduled