Schedule: the flights that flew on Tuesday, Oct 6, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.

DELTA · FLIGHT DL 1661 SCHEDULED · TYPICAL SCHEDULE

Tuesday, October 13 Tomorrow

DL 1661 · DCA → BOS

departs 5:16 PM ET · arrives 6:44 PM ET

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

DL 1661 isn’t flying DCA → BOS on Tue, Oct 13

This listing came from a typical schedule. According to the FAA, DL 1661 flies these legs that day:

BOS → DCA · 2:40 PM · scheduled