The average train between SeaTac and Sammamish takes 1h 12m and the fastest train takes 1h 10m. The train runs at least 5 times per hour from SeaTac to Sammamish. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Trains run every 15 minutes between SeaTac and Sammamish. The earliest departure is at 1:13 PM in the afternoon, and the last departure from SeaTac is at 8:53 PM which arrives into Sammamish at 10:04 PM. All services require a transfer, and take on average 1h 12m. The schedules shown below are for the next available departures.

1h 11m • 1 change

1h 11m • 1 change

1h 11m • 1 change

1h 11m • 1 change
Want to know about travelling from SeaTac to Sammamish? We have put together a list of the most frequently asked questions from our users such as: What is the cheapest mode of transport? What is the quickest option? How much do tickets usually cost? and many more.
No, there is no direct train from SeaTac to Sammamish. However, there are services departing from SeaTac station and arriving at Sammamish station via Int'l Dist/Chinatown. The journey, including transfers, takes approximately 1h 12m.
SeaTac to Sammamish train services, operated by Sound Transit, depart from SeaTac/Airport station.
SeaTac to Sammamish train services, operated by Sound Transit, arrive at Redmond Technology station.
The distance between SeaTac and Sammamish is 26.7 km. The road distance is 44 km.
You can take a vehicle from SeaTac/Airport to Redmond Technology via Int'l Dist/Chinatown in around 1h 32m.