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Home/Page directory/Sound Transit, Metro Transit, City of Seattle - King County Metro/121/First & last times
121

King County / Bus

Sound Transit, Metro Transit, City of Seattle - King County Metro 121 first and last departure times

121 · America/Los_Angeles

Selected branch: Downtown Seattle Via SR-509 · 14 stops. Service day: Friday, October 30, 2026.

Fri, Oct 308 published tripsSat, Oct 310 published tripsSun, Nov 10 published tripsMon, Nov 28 published tripsTue, Nov 38 published tripsWed, Nov 48 published tripsThu, Nov 58 published trips

First and last published boarding times

Friday, October 30, 2026 · Downtown Seattle Via SR-509. These are supplied times for this branch. Stops or trips with omitted times cannot establish complete first/last bounds. Drop-off-only visits are excluded. A frequency window’s end is labeled separately and is not an exact last departure.

Boarding stopFirst departureLast departure / window endService notes
Burien Transit Center - Bay 5Visit 1 · 523056:15 AM6:36 PM8 scheduled departures
Sr 509 & S 128th StVisit 2 · 477356:19 AM6:40 PM8 scheduled departures
East Marginal Way S & S Lucile StVisit 3 · 408016:30 AM6:52 PM8 scheduled departures
East Marginal Way S & S Hudson StVisit 4 · 408026:30 AM6:53 PM8 scheduled departures
East Marginal Way S & S Alaska StVisit 5 · 408046:31 AM6:53 PM8 scheduled departures
East Marginal Way S & Diagonal Ave SVisit 6 · 408066:31 AM6:54 PM8 scheduled departures
East Marginal Way S & S Idaho StVisit 7 · 408076:32 AM6:54 PM8 scheduled departures
Alaskan Way S & S Jackson StVisit 8 · 15616:37 AM7:00 PM8 scheduled departures
Alaskan Way & Columbia StVisit 9 · 15596:38 AM7:01 PM8 scheduled departures
3rd Ave & Madison StVisit 10 · 5486:39 AM7:02 PM8 scheduled departures
3rd Ave & Union StVisit 11 · 5706:42 AM7:05 PM8 scheduled departures
3rd Ave & Pine StVisit 12 · 5906:43 AM7:06 PM8 scheduled departures
3rd Ave & Virginia StVisit 13 · 6006:45 AM7:08 PM8 scheduled departures
3rd Ave & Bell StVisit 14 · 6056:47 AM7:10 PM8 scheduled departures

Times after midnight belong to the service date above. These route limits do not establish the last viable connecting journey. Check connection times separately, or use a reviewed airport guide for a direct airport journey.

First and last times on other branches

All other published stopping patterns for the same service date. Open a branch to compare its stop-by-stop boarding limits.

Burien Transit Center Via SR-509 · 14 stops · Pattern ca08507ded31c25f87280239
Boarding stop / visitFirstLast departure / window end
3rd Ave & Bell StVisit 1 · 4005:44 AM6:00 PM
3rd Ave & Virginia StVisit 2 · 4205:45 AM6:01 PM
3rd Ave & Pike StVisit 3 · 4335:47 AM6:03 PM
3rd Ave & Seneca StVisit 4 · 4685:48 AM6:04 PM
3rd Ave & Columbia StVisit 5 · 4815:50 AM6:06 PM
Columbia St & Alaskan WayVisit 6 · 15585:52 AM6:08 PM
Alaskan Way S & S Jackson StVisit 7 · 15625:52 AM6:08 PM
East Marginal Way S & S Idaho StVisit 8 · 850595:58 AM6:15 PM
East Marginal Way S & Diagonal Ave SVisit 9 · 850625:58 AM6:16 PM
East Marginal Way S & S Alaska StVisit 10 · 850645:59 AM6:16 PM
East Marginal Way S & S Hudson StVisit 11 · 850665:59 AM6:17 PM
East Marginal Way S & S Lucile StVisit 12 · 850676:00 AM6:18 PM
Sr 509 & S 128th StVisit 13 · 850696:11 AM6:31 PM
Burien Transit Center - Bay 5Visit 14 · 523056:15 AM6:36 PM

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 30, 2026 · 09:32 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 ↗