Schedule: the flights that flew on Wednesday, Nov 4, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.

DELTA · FLIGHT DL 1787 SCHEDULED · TYPICAL SCHEDULE
Today

DL 1787 · DTW → IAD

departs 3:08 PM ET · arrives 4:41 PM ET
Forecast issued Wed 6:00 AM ET · 9h before departure

DL 1787 isn’t flying DTW → IAD today

This listing came from a typical schedule. According to the FAA, DL 1787 flies these legs today: