5A 8950 then UA 5970 at Salt Lake City
Butte → Salt Lake City → San Francisco
Timetable, Salt Lake City time
09:355A 8950 from Butte at the gate
09:04UA 5970 to San Francisco leaves the gate
23 h 29 apart on the timetable, overnight
UA 5970 leaves 23 h 29 after 5A 8950 arrives on the timetable: more than half a day, so not a connection we count.