F9 1439 then WN 257 at Phoenix
Salt Lake City → Phoenix → Washington National
Timetable, Phoenix time
17:00F9 1439 from Salt Lake City at the gate
11:30WN 257 to Washington National leaves the gate
18 h 30 apart on the timetable, overnight
WN 257 leaves 18 h 30 after F9 1439 arrives on the timetable: more than half a day, so not a connection we count.