Check with the DAO people for the latest information. Flights in and out of Seattle use SeaTac airport, the main regional airport, which is 25 miles from campus. It is possible to make connections to many other flights, though layovers can be long. You should have proof of auto insurance, which most rental car companies will provide on short notice. The Seattle station is a bit grungy, especially in the late evening.
Unscheduled delays are free.
However, the airports of both cities are not especially convenient to either campus. Information is not readily available at this time.