WN 1671 then WN 840 at Phoenix
St Louis → Phoenix → St Louis
Timetable, Phoenix time
07:30WN 1671 from St Louis at the gate
13:35WN 840 to St Louis leaves the gate
6 h 05 apart on the timetable
The last days
WN 1671 and WN 840 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.