WN 931 then WN 257 at Phoenix
Lagos → Phoenix → Washington National
Timetable, Phoenix time
08:15WN 931 from Lagos at the gate
11:30WN 257 to Washington National leaves the gate
3 h 15 apart on the timetable
The last days
WN 931 and WN 257 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.