First train to 5:30 a.m. - varies.
5:30 a.m. - 9 p.m. - every 10 minutes.
9 p.m. to 10:30 p.m. - every 12 minutes
10:30 p.m. to last train - every 15 minutes.
The 1 Line will be closed between SeaTac/Airport and Angle Lake stations from the start of service until noon. All passengers must transfer to King County Metro's A Line to travel between these stations during this time.