When should I get to Seatac this Wednesday?

Hi friends, I have a flight down to San Francisco this Wednesday and I'll be checking a bag. Flight is at 1141am. What time should I book my spot saver and what time should I arrive at the airport?

I always arrive too early and I'd love to be a little more reasonable about it. Currently, Uber from Redmond leaves at 815am, and the spot saver for 10am. But that seems unnecessary. I was thinking I could book the uber for 845am and the spot saver for 1015am? Please let me know your thoughts. Thank you!