WN 998 then DL 5517 at Detroit
Baltimore → Detroit → Washington
Timetable, Detroit time
23:55WN 998 from Baltimore at the gate
09:12DL 5517 to Washington leaves the gate
9 h 17 apart on the timetable, overnight
The last days
WN 998 and DL 5517 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.