Train
The 1 line can get you from the Seatac Airport to Seattle, and the 2 line can get you from Seattle to Redmond. It's helpful for getting near, albeit not all the way, to the wedding location.
Hotel
This one is the closest and most economical option. It is walking distance to the Marymoor Village light rail station (convenient for getting between here and the airport), and a 15 minute drive to the wedding venue.
Hotel
This is second-most economical option and a great option to be midway between our place in Seward Park and the wedding in Redmond. Issaquah is a cute town surrounded by the beautiful green mountains of western Washington.
Hotel
This one is walking distance to the Downtown Redmond light rail station (convenient for getting between here and the airport), and a 15 minute drive to the wedding venue.
Hotel
Funky, charming, walking distance from the Capitol Hill light rail station, and just south of the neighborhood Natalie used to live in when she and David were falling in love (we still reminisce about living in this neighborhood and all the amazing things we could walk to...), this little Inn seems awesome! Staying anywhere in Cap Hill would be a really fun way to experience the city.
Hotel
We're not partial to any particular hotel in Seattle seeing as we've never needed to book one ourselves, but here is at least one suggestion in Downtown. Staying Downtown will provide great daytime sights and sounds by foot and bus.
Hotel
If you are planning to rent a car and spend time between Tacoma (where Natalie's parents live), Seattle (where Natalie, David, and the rest of their family live), and Redmond (where the wedding is), Renton might be a good option as it is centrally located between all three of these, and close to the airport. Here is just one suggestion.