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.

DELTA · FLIGHT DL 637 SCHEDULED · TYPICAL SCHEDULE

Sunday, October 4 Today

DL 637 · ORD → SEA

departs 5:55 PM CT · arrives 8:34 PM PT

Forecast issued Sun 2:00 PM ET · 5h before departure

DL 637 isn’t flying ORD → SEA today

This listing came from a typical schedule. According to the FAA, DL 637 flies these legs today:

SEA → ORD · 11:55 AM · scheduled
SEA → ORD · 1:05 PM · scheduled