If you're looking at the weekend, make the drive to Crystal.
It's the best in WA in my opinion. Day tickets are good till 4PM. (Mayby 4:30) and thiers night skiing isn't very big.
If you're going to weekday it, Stevens is a nice spot, slightly closer to Redmond, but Saturdays are brutally crowded with ski schools in Jan.
Also, Stevens is charging the same for a lift ticket as Crystal, but with only half the mountain.
Alpental is the easiest access and closest plus it has some truely amazing steeps up top, but it's closed on Mondays.
The rest of Snoqualmie pass is not as aggessive.
Snoqualmie pass is also the lowest altitude of these 3, so the snow tends to be heavier. January is usually a good month for cold temps so you should be OK at any of them.
In your shoes, I'd stay the extra day, drive from Redmond to Enumclaw that night for a hotel after the Redmond meeting, ski Crystal, and then catch the last flight home.
FYI, Last flight on Alaska Air from Seattle to:
San Jose = 7PM
To Oakland = 8:40 PM
To SFO = 8:59
Happy trails, goood luck with the interviews, and good runs.