CTA bus 121 stop list and CTA bus tracker 121
The CTA bus 121 - Union / Streeterville Express serves 9 bus stops in Chicago departing from Union Station Transit Center and ending at Fairbanks / Chicago. Scroll down to see upcoming bus 121 times at each stop. You can also see connecting lines for the bus 121 route at each stop, including connections to the 'L' or other transit options, so you can understand where and when to transfer. The CTA bus tracker 121 shows the next scheduled departure from the CTA. The full CTA 121 schedule with real-time tracker data is available in the Transit app.
CTA bus 121 route map
The CTA bus 121 - Union / Streeterville Express route map is shown above. The route map shows you an overview of all the stops served by the CTA bus 121 to help you plan your trip on CTA. Opening the app will allow you to see more detailed information about the route on a map including stop specific alerts, such as stops that have been closed or moved. You can also use the included CTA tracker in the app to see the location of vehicles in real-time on the route map so you know when the 121 bus is approaching your stop.
See the detailed route mapCTA bus 121 Service Alerts
Open the Transit app to see more information about any active disruptions that may impact the bus 121 schedule, such as detours, moved stops, trip cancellations, major delays, or other service changes to the bus route. The app also allows you to subscribe to receive notifications for any service alert issued by CTA so that you can plan your trip around any active or future disruptions.
See all alertsCTA 121 bus Service Frequency
The next 121 bus leaves Union Station Transit Center at 6:40 AM, and arrives at Fairbanks / Chicago at 6:56 AM. You can see the frequency of upcoming trips and the exact departure times by opening the Transit app.
See all departuresCTA 121 bus On-Time Performance
Want to know whether the CTA 121 bus arrives on time? Open the Transit app and view user generated on-time performance reports for the 121 bus. You can also contribute your own reports on whether your trip arrived on time, late or early. As these on-time performance stats are user reported, they may differ from official CTA metrics.
See all on-time perfomance details