There's a small chunk of commuters out of SLC to SFO, LAX and a couple to DEN. About 10 flights a day, mostly Skywest and Delta to SFO. Delta, SW, Alaska, AA (Compass) and UA Express to LAX- 18 flights a day. There's only 2-3 flights that get you to SFO before 10AM, but LAX you have more options.

When the weather sucks in SFO the commute gets challenging. United loves to cancel the last SFO-SLC. Alaska flight 744, the last SFO-SLC (usually) will almost always go, even if it's delayed 4+hours.

I've missed a couple flights here and there, but never had a no-show for a trip.

Long Call from SLC is not really doable for an early AM departure. I'd definitely recommend a crashpad.