Wow, I didn't take cruise ships into the equation. I am definitely risk averse when lining up at the airport! We rent cars from Silvercar, so returning the car is a little quicker as we don't have to refuel (they do it for you for an extra $5.00 charge) and it's not located with the other rental cars, so has it's own shuttle, but even with that time savings, I don't think it will be enough.

Will take your suggestion to just stay close to the airport.

Thanks everyone for the insights.

FYI: The title of your thread has been edited to 'Where to go for the week-end'.

My time estimate wasn't anything to do with cruiseships being in town, or not. That's what I would allow myself anytime going to SeaTac.