Bus - 21

21 Line

21a - Union Station

GO Transit

GO Transit 21 Bus Route Schedule and Stops (Updated)

The 21 bus (21a - Union Station) has 29 stops departing from Milton Go and ending at Union Station Bus Terminal.

Choose any of the 21 bus stops below to find updated real-time schedules and to see their route map.

Direction: 21a - Union Station (29 stops)

  • Milton Go

  • Thompson Rd. S. @ Childs Dr.

  • Thompson Rd. S. @ Mccuaig Dr.

  • Thompson Rd. S. @ Laurier Ave.

  • Derry Rd. @ Thompson Rd. S.

  • Derry Rd. @ Thompson Rd. S.

  • Derry Rd. @ Armstrong Blvd.

  • Derry Rd. @ Sauve St.

  • Derry Rd. @ Fourth Line

  • Derry Rd. @ Trudeau Dr.

  • Derry Rd. @ James Snow Pkwy.

  • Derry Rd. W. @ Ninth Line

  • Derry Rd. W. @ Lisgar Dr.

  • Derry Rd At Forest Park Dr

  • Derry Rd At Tenth Line

  • Derry Rd At Danton Promenade

  • Derry Rd At Winston Churchill Blvd

  • Winston Churchill Blvd At Vanderbilt Rd

  • Aquitaine Ave. @ Meadowvale Town Centre Circle

  • Aquitaine Ave First Stop East Of Glen Erin Dr

  • Aquitaine Ave At Montevideo Rd

  • Aquitaine Ave. @ Millcreek Dr.

  • Meadowvale Go

  • Millcreek Dr South Of Aquitaine Ave

  • Millcreek Dr at Millrace Crt

  • Erin Mills Pkwy At Millcreek Dr

  • Mississauga Rd. @ Mississauga Rd.

  • Mississauga Rd. @ Argentia Rd.

  • Union Station Bus Terminal

21 FAQ

  • What time does the 21 bus start operating?

    Services on the 21 bus start at 07:30 on Saturday, Sunday.

  • What time does the 21 bus stop working?

    Services on the 21 bus stop at 15:15 on Monday, Tuesday, Wednesday, Thursday, Friday.

  • What time does the 21 bus arrive?

    When does the 21a - Union Station bus line come? Check Live Arrival Times for live arrival times and to see the full schedule for the 21a - Union Station bus line that is closest to your location.

  • Is there a 21 bus stop near me?

    Click here to view the nearest 21 bus stop.

GO Transit 21 bus Route Map - 21a - Union Station

21 bus Line Map
PDF Version: 21 schedule, stops and map

21 Bus Schedule

21 bus route operates everyday. Regular schedule hours: 09:10-15:15

DayOperating HoursFrequency (min)
Mon09:10-15:1530-60
Tue09:10-15:1530-60
Wed09:10-15:1530-60
Thu09:10-15:1530-60
Fri09:10-15:1530-60
Sat07:30-18:2555-60
Sun07:30-18:2555-60
View full schedule online

GO Transit Service Alerts

See all updates on 21 (from Milton Go), including real-time status info, bus delays, changes of routes, changes of stops locations, and any other service changes. Get a real-time map view of 21 (21a - Union Station) and track the bus as it moves on the map. Download the app for all GO Transit Bus info now.

21 line bus fare

GO Transit 21 (21a - Union Station) prices may change based on several factors. For more information about GO Transit tickets costs please check the Moovit app or GO Transit Bus’s official website.

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21 (GO Transit)

The first stop of the 21 bus route is Milton Go and the last stop is Union Station Bus Terminal. 21 (21a - Union Station) is operational during everyday.

Additional information: 21 has 29 stops and the total trip duration for this route is approximately 81 minutes.

On the go? See why over 1.5 million users trust Moovit as the best public transit app. Moovit gives you GO Transit suggested routes, real-time bus tracker, live directions, line route maps in Toronto, and helps to find the closest 21 bus stops near you. No internet available? Download an offline PDF map and bus schedule for the 21 bus to take on your trip.

Line 21 Real Time bus Tracker

Track line 21 (21a - Union Station) on a live map in real time and follow its location as it moves between stations. Use Moovit as a line 21 bus tracker or a live GO Transit bus tracker app and never miss your bus.

Use the app as a trip planner for GO Transit or a trip planner for bus, Streetcar, subway, train or ferry to plan your route around Toronto. The trip planner shows updated data for GO Transit and any bus, including line 21, in Toronto

21 - Alternative Directions

GO Transit Lines in Toronto