121 Union/Streeterville Express

Bus route information

Schedule Brochure (.pdf)

Bus Stop List (.htm)

All CTA buses are accessible

Service description: See schedule for full details.

First bus/last bus

Spans of service below show when first bus departs terminal of origin through last bus departs terminal of origin. First and last buses reach mid-route stops later than these times-see schedule or use trip planner for specific times when service works for you.

Union Station east to Fairbanks/Chicago

6:40a-9:15a weekdays

McClurg/Huron west to Union Station

6:45a-9:35a weekdays

Union Station east to McClurg/Huron

4:00p-5:55p weekdays

Fairbanks/Huron west to Union Station

3:40p-6:15p weekdays

No stops between Union Station and Lower South Water/Michigan eastbound and Lower Wacker/Michigan westbound (except as noted).

(Precise hours of service may vary depending on where along the route you are.)

Service alerts

RSS Feed: #121 Union/Streeterville Express Alerts

Quick links

Schedules

Fares

Maps

Alerts

Trackers

Ventra

Holiday schedules

Note that Sunday schedules apply on the following holidays: New Year’s Day, Memorial Day, Independence Day, Labor Day, Thanksgiving and Christmas (and/or on their dates of observance).

March rail timetable update

We routinely adjust schedules to help make service operate more efficiently and to account for seasonal ridership patterns.

Train routes will have their schedules updated effective March 26.

View the updated route timetables