WN 1728 then WN 39 at Phoenix
Denver → Phoenix → Tucson
Timetable, Phoenix time
09:40WN 1728 from Denver at the gate
10:35WN 39 to Tucson leaves the gate
55 min apart on the timetable
The last days
WN 1728 and WN 39 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.