King County Metro Route 121
Bus Seattle, WA27 stopsto Downtown Seattle Via SR-509to Burien Transit Center Via SR-509
LIVE SERVICE STATUS
Checking the King County Metro alerts feed…
Schedule summary
Computed from the King County Metro GTFS feed (version FAL26-161.2). Each row is the next day of that kind with service.
| Day | Direction | First | Last | Trips | Typical gap |
|---|---|---|---|---|---|
| WeekdayTue, Oct 27 | to Downtown Seattle Via SR-509 | 6:15 AM | 6:36 PM | 8 | ~45 min |
| to Burien Transit Center Via SR-509 | 5:44 AM | 6:00 PM | 8 | ~45 min | |
| Saturday | No saturday service in the current feed | ||||
| Sunday | No sunday service in the current feed | ||||
Stops & times — today, Tue, Oct 27
To Downtown Seattle Via SR-509 · 14 stops
Departures from Burien Transit Center - Bay 5 today:
6:15 AM7:00 AM7:45 AM8:30 AM4:21 PM5:06 PM5:51 PM6:36 PM
- 1
Burien Transit Center - Bay 5
First 6:15 AM · Last 6:36 PM · 8 scheduled departures
- 2
Sr 509 & S 128th St
First 6:19 AM · Last 6:40 PM · 8 scheduled departures
- 3
East Marginal Way S & S Lucile St
First 6:30 AM · Last 6:52 PM · 8 scheduled departures
- 4
East Marginal Way S & S Hudson St
First 6:30 AM · Last 6:53 PM · 8 scheduled departures
- 5
East Marginal Way S & S Alaska St
First 6:31 AM · Last 6:53 PM · 8 scheduled departures
- 6
East Marginal Way S & Diagonal Ave S
First 6:31 AM · Last 6:54 PM · 8 scheduled departures
- 7
East Marginal Way S & S Idaho St
First 6:32 AM · Last 6:54 PM · 8 scheduled departures
- 8
Alaskan Way S & S Jackson St
First 6:37 AM · Last 7:00 PM · 8 scheduled departures
- 9
Alaskan Way & Columbia St
First 6:38 AM · Last 7:01 PM · 8 scheduled departures
- 10
3rd Ave & Madison St
First 6:39 AM · Last 7:02 PM · 8 scheduled departures
- 11
3rd Ave & Union St
First 6:42 AM · Last 7:05 PM · 8 scheduled departures
- 12
3rd Ave & Pine St
First 6:43 AM · Last 7:06 PM · 8 scheduled departures
- 13
3rd Ave & Virginia St
First 6:45 AM · Last 7:08 PM · 8 scheduled departures
- 14
3rd Ave & Bell St
First 6:47 AM · Last 7:10 PM · 8 scheduled departures
To Burien Transit Center Via SR-509 · 14 stops
Departures from 3rd Ave & Bell St today:
5:44 AM6:29 AM7:14 AM7:59 AM3:45 PM4:30 PM5:15 PM6:00 PM
- 1
3rd Ave & Bell St
First 5:44 AM · Last 6:00 PM · 8 scheduled departures
- 2
3rd Ave & Virginia St
First 5:45 AM · Last 6:01 PM · 8 scheduled departures
- 3
3rd Ave & Pike St
First 5:47 AM · Last 6:03 PM · 8 scheduled departures
- 4
3rd Ave & Seneca St
First 5:48 AM · Last 6:04 PM · 8 scheduled departures
- 5
3rd Ave & Columbia St
First 5:50 AM · Last 6:06 PM · 8 scheduled departures
- 6
Columbia St & Alaskan Way
First 5:52 AM · Last 6:08 PM · 8 scheduled departures
- 7
Alaskan Way S & S Jackson St
First 5:52 AM · Last 6:08 PM · 8 scheduled departures
- 8
East Marginal Way S & S Idaho St
First 5:58 AM · Last 6:15 PM · 8 scheduled departures
- 9
East Marginal Way S & Diagonal Ave S
First 5:58 AM · Last 6:16 PM · 8 scheduled departures
- 10
East Marginal Way S & S Alaska St
First 5:59 AM · Last 6:16 PM · 8 scheduled departures
- 11
East Marginal Way S & S Hudson St
First 5:59 AM · Last 6:17 PM · 8 scheduled departures
- 12
East Marginal Way S & S Lucile St
First 6:00 AM · Last 6:18 PM · 8 scheduled departures
- 13
Sr 509 & S 128th St
First 6:11 AM · Last 6:31 PM · 8 scheduled departures
- 14
Burien Transit Center - Bay 5
First 6:15 AM · Last 6:36 PM · 8 scheduled departures
King County Metro Route 121 — questions
What time does King County Metro Route 121 run on weekdays?
On a typical weekday (Tue, Oct 27), the first King County Metro Route 121 departure is 6:15 AM and the last is 6:36 PM, running roughly every 45 minutes. Times are the published schedule from the King County Metro GTFS feed (version FAL26-161.2).
Where does King County Metro Route 121 go?
King County Metro Route 121 serves 27 stops: Burien Transit Center - Bay 5 → 3rd Ave & Bell St (to Downtown Seattle Via SR-509); 3rd Ave & Bell St → Burien Transit Center - Bay 5 (to Burien Transit Center Via SR-509). The full ordered stop list with first and last departure times is on this page.
Does King County Metro Route 121 run on weekends?
No Saturday service in the current feed; no Sunday service in the current feed. See the schedule summary for first and last times.
Is King County Metro Route 121 delayed or on detour right now?
The live service status section at the top of this page reads King County Metro's realtime alerts feed — detours, suspensions and delays for this route appear there as the agency posts them. Everything else on this page is the published timetable.
Can I watch King County Metro Route 121 live on a map?
Yes — the WorldEye globe carries King County Metro's live vehicle positions on its transit layer. Open the live map from this page, and tap any vehicle or stop for its next arrivals. It's free, no signup.
More Bus routes
Times on this page are the published schedule from King County Metro's GTFS feed (version FAL26-161.2); live status comes from the agency's realtime alerts feed and can differ. Data: King County Metro. Long name as published: “121”. WorldEye is a free viewer — for fares, passes and official notices, see King County Metro's own site.
The globe is free. The locked layers aren’t.
Everything on this page is free with no signup. Paid plans unlock the intelligence toolkit, intel layers, timelapse, camera alerts and the recording studio — and every plan starts with a free trial. We email you before your trial's first charge.
3 DAYS FREE
Weekly
$7.99/week
about $1.14 a day
3 days free, then billed weekly · cancel anytime
10 DAYS FREE
Monthly
$13.99/month
about $0.47 a day
10 days free, then billed monthly · cancel anytime
10 DAYS FREE
VIP Pro
$74.99/year
about $0.21 a day
10 days free, then billed annually · cancel anytime
Covered by a 7-day money-back guarantee on your first charge — email us within 7 days of the charge for a full refund, no questions asked.