DL 604 then DL 1752 at Seattle
Cancún → Seattle → Spokane
Timetable, Seattle time
21:05DL 604 from Cancún at the gate
22:43DL 1752 to Spokane leaves the gate
1 h 38 apart on the timetable
Seattle’s board gives a departure time for only about 56% of its flights, so many days show no gate time.
The last days
DL 604 and DL 1752 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.