First train to 6:00 a.m. - varies.
6:00 a.m. to 10:00 a.m. - every 8 minutes.
10:00 a.m. to 3:00 p.m. - every 10 minutes.
3:00 p.m. to 6:30 p.m. - every 8 minutes.
6:30 p.m. to 9:00 p.m. - every 10 minutes.
9:00 p.m. to 10:30 p.m. - every 12 minutes.
10:30 p.m. to last train - every 15 minutes.
All passengers who need to travel through SeaTac Station must transfer to another train. This train runs every 16-20 minutes.