Here's a hint. It's sorta weird, but is totally true. When it's cloudy and raining in seattle, the planes 99.9999% of the time land to the South and take off to the south. When it's a clear sunny day, the planes 99.9999% of the time land from north to south, and take off to the north. During this time of year, it's mostly raining here in Seattle, and guess what...the planes are always landing to the south and taking off to the south. Check the weather in seattle the day before you leave, and see what it will be that day...If it says sunny, sit on the right side of the airplane and you'll fly in to the North over Tacoma and you'll see Rainier in all her glory. Otherwise, if it's raining and cloudy, sit on the right side of the plane also, you'll get an awesome view of downtown seattle, and you generally cannot see Rainier when landing from the North on a cloudy day. Good luck!
STEVE NWA ramp agent SEA