WN 574 then WN 654 at Denver
San Francisco → Denver → Houston Hobby
Timetable, Denver time
04:05WN 574 from San Francisco at the gate
08:25WN 654 to Houston Hobby leaves the gate
4 h 20 apart on the timetable
The last days
WN 574 and WN 654 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.