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121

King County / Bus

Sound Transit, Metro Transit, City of Seattle - King County Metro 121 schedule and full timetable

121 · America/Los_Angeles

Selected branch: Downtown Seattle Via SR-509 · 14 stops. Service day: Thursday, October 29, 2026.

Thu, Oct 298 published tripsFri, Oct 308 published tripsSat, Oct 310 published tripsSun, Nov 10 published tripsMon, Nov 28 published tripsTue, Nov 38 published tripsWed, Nov 48 published trips

Sound Transit, Metro Transit, City of Seattle - King County Metro 121 full stop-by-trip timetable

All stops on the selected branch, October 29, 2026. 8 fixed scheduled trips; showing 1–8. Frequency service is listed in the boarding schedule below. A dash means the agency supplies no time.

Stop / tripTrip 1Trip 2Trip 3Trip 4Trip 5Trip 6Trip 7Trip 8
Burien Transit Center - Bay 56:15 AM7:00 AM7:45 AM8:30 AM4:21 PM5:06 PM5:51 PM6:36 PM
Sr 509 & S 128th St6:19 AMEstimated7:05 AMEstimated7:50 AMEstimated8:35 AMEstimated4:26 PMEstimated5:11 PMEstimated5:56 PMEstimated6:40 PMEstimated
East Marginal Way S & S Lucile St6:30 AMEstimated7:18 AMEstimated8:03 AMEstimated8:48 AMEstimated4:38 PMEstimated5:23 PMEstimated6:08 PMEstimated6:52 PMEstimated
East Marginal Way S & S Hudson St6:30 AMEstimated7:19 AMEstimated8:04 AMEstimated8:49 AMEstimated4:39 PMEstimated5:23 PMEstimated6:08 PMEstimated6:53 PMEstimated
East Marginal Way S & S Alaska St6:31 AMEstimated7:19 AMEstimated8:04 AMEstimated8:49 AMEstimated4:39 PMEstimated5:24 PMEstimated6:09 PMEstimated6:53 PMEstimated
East Marginal Way S & Diagonal Ave S6:31 AMEstimated7:20 AMEstimated8:05 AMEstimated8:50 AMEstimated4:40 PMEstimated5:24 PMEstimated6:09 PMEstimated6:54 PMEstimated
East Marginal Way S & S Idaho St6:32 AMEstimated7:20 AMEstimated8:05 AMEstimated8:50 AMEstimated4:40 PMEstimated5:25 PMEstimated6:10 PMEstimated6:54 PMEstimated
Alaskan Way S & S Jackson St6:37 AMEstimated7:27 AMEstimated8:12 AMEstimated8:57 AMEstimated4:47 PMEstimated5:31 PMEstimated6:16 PMEstimated7:00 PMEstimated
Alaskan Way & Columbia St6:38 AMEstimated7:28 AMEstimated8:13 AMEstimated8:58 AMEstimated4:48 PMEstimated5:32 PMEstimated6:17 PMEstimated7:01 PMEstimated
3rd Ave & Madison St6:39 AM7:29 AM8:14 AM8:59 AM4:49 PM5:33 PM6:18 PM7:02 PM
3rd Ave & Union St6:42 AM7:32 AM8:17 AM9:02 AM4:52 PM5:36 PM6:21 PM7:05 PM
3rd Ave & Pine St6:43 AMEstimated7:33 AMEstimated8:18 AMEstimated9:03 AMEstimated4:53 PMEstimated5:37 PMEstimated6:22 PMEstimated7:06 PMEstimated
3rd Ave & Virginia St6:45 AMEstimated7:35 AMEstimated8:20 AMEstimated9:05 AMEstimated4:55 PMEstimated5:39 PMEstimated6:24 PMEstimated7:08 PMEstimated
3rd Ave & Bell St6:47 AM7:37 AM8:22 AM9:07 AM4:57 PM5:41 PM6:26 PM7:10 PM

Every departure from Burien Transit Center - Bay 5

For the selected service day and branch. After-midnight times retain their service-day association; “+1 day” means the following calendar day.

Departure / windowDestinationBoarding notes
6:15 AMDowntown Seattle Via SR-509Scheduled
7:00 AMDowntown Seattle Via SR-509Scheduled
7:45 AMDowntown Seattle Via SR-509Scheduled
8:30 AMDowntown Seattle Via SR-509Scheduled
4:21 PMDowntown Seattle Via SR-509Scheduled
5:06 PMDowntown Seattle Via SR-509Scheduled
5:51 PMDowntown Seattle Via SR-509Scheduled
6:36 PMDowntown Seattle Via SR-509Scheduled

More Sound Transit, Metro Transit, City of Seattle - King County Metro travel information

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Published Sound Transit, Metro Transit, City of Seattle - King County Metro schedule

Imported Oct 24, 2026 · 04:36 UTC · Service dates 2026-08-29 through 2027-12-31. See data status

Schedule data published by Sound Transit, Metro Transit, City of Seattle - King County Metro. Feed discovery and cached source archives from MobilityData. Source details ↗