WN 2975 then DL 3917 at Salt Lake City
Denver → Salt Lake City → Boise
Timetable, Salt Lake City time
09:40WN 2975 from Denver at the gate
15:00DL 3917 to Boise leaves the gate
5 h 20 apart on the timetable
The last days
WN 2975 and DL 3917 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.