AA 1637 then DL 637 at O'Hare
Washington National → Chicago → Seattle (SEA)
Timetable, Chicago time
17:00AA 1637 from Washington National at the gate
17:55DL 637 to Seattle (SEA) leaves the gate
55 min apart on the timetable
The last days
AA 1637 and DL 637 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.