AA 540 then UA 370 at Phoenix
Spokane → Phoenix → Chicago O'Hare
Timetable, Phoenix time
17:22AA 540 from Spokane at the gate
18:20UA 370 to Chicago O'Hare leaves the gate
58 min apart on the timetable
The last days
AA 540 and UA 370 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.