Chicago / Bus
CTA 121 live tracking and departures
Union/Streeterville Express · America/Chicago
Selected branch: Agency stopping pattern · 7 stops.
121 live vehicle tracking
Live data unavailable. Fresh vehicle positions only; 0 fresh vehicles matched to this route. The map shows vehicles assigned to the selected stopping pattern. Vehicles on other branches may be omitted.
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Official route geometry · 0 fresh vehicles on selected branch
Positions refresh every 30 seconds. An absent marker does not establish a canceled trip. Predictions and vehicle positions can have different availability.
Next departures from Union Station Transit Center
Scheduled serviceScheduled
6:10 AM6:10 AM · Fri, Oct 30
Scheduled serviceScheduled
6:25 AM6:25 AM · Fri, Oct 30
Scheduled serviceScheduled
6:37 AM6:37 AM · Fri, Oct 30
Scheduled serviceScheduled
6:49 AM6:49 AM · Fri, Oct 30
Scheduled serviceScheduled
7:01 AM7:01 AM · Fri, Oct 30
Scheduled serviceScheduled
7:08 AM7:08 AM · Fri, Oct 30
Scheduled serviceScheduled
7:14 AM7:14 AM · Fri, Oct 30
Scheduled serviceScheduled
7:20 AM7:20 AM · Fri, Oct 30
Scheduled serviceScheduled
7:26 AM7:26 AM · Fri, Oct 30
Scheduled serviceScheduled
7:32 AM7:32 AM · Fri, Oct 30
Scheduled serviceScheduled
7:38 AM7:38 AM · Fri, Oct 30
Scheduled serviceScheduled
7:44 AM7:44 AM · Fri, Oct 30
Live data unavailable · Live predictions and published schedule fallbacks are labeled on each departure.
More CTA travel information
Published CTA schedule
Imported Oct 24, 2026 · 04:54 UTC · Service dates 2026-09-11 through 2026-11-30. See data status
Schedule data published by Chicago Transit Authority (CTA). Feed discovery and cached source archives from MobilityData. Source details ↗