Schedule: the flights that flew on Tuesday, Nov 3, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.

DELTA · FLIGHT DL 1579 SCHEDULED · TYPICAL SCHEDULE
Today

DL 1579 · DCA → MCO

departs 2:56 PM ET · arrives 5:27 PM ET
Forecast issued Tue 3:00 AM ET · 12h before departure

DL 1579 isn’t flying DCA → MCO today

This listing came from a typical schedule. According to the FAA, DL 1579 flies these legs today: