WN 2188 then WN 158 at Denver
Ontario → Denver → Tulsa
Timetable, Denver time
09:30WN 2188 from Ontario at the gate
11:00WN 158 to Tulsa leaves the gate
1 h 30 apart on the timetable
The last days
WN 2188 and WN 158 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.