MC 252 then BR 23 at Seattle
Anchorage → Seattle → Taipei
Timetable, Seattle time
18:45MC 252 from Anchorage at the gate
23:30BR 23 to Taipei leaves the gate
4 h 45 apart on the timetable
Seattle’s board gives a departure time for only about 57% of its flights, so many days show no gate time.
The last days
MC 252 and BR 23 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.