GO Transit is the inter-regional transportation authority of the Golden Horseshoe, which includes the Greater Toronto and Hamilton Area. It is Canada's oldest regional transit system, first serving passengers in 1967.

Fare zones The service area of GO Transit is divided into a number of fare zones, each of which belonging to a number of fare corridors. Fares on GO Transit are based on the distance between originating and destination fare zones. Tickets between two fare zones are valid for travel between the two fare zones stated on the ticket, as well as between any two fare zones that lie between them on the same fare corridor. Tickets are not generally issued between two fare zones on different corridors, with the following notable exceptions:

Due to all-day GO train service and the interlining of the Lakeshore West line and the Lakeshore East line, tickets may be issued for trips starting in a fare zone on one line and ending in a fare zone on the other. Similarly, due to the number of GO bus connections between stations on the Lakeshore West line and the Milton line (including Square One Bus Terminal, but excluding Lisgar GO station), tickets may be issued for trips starting in a fare zone in Mississauga or Milton outside of the Lakeshore West line and fare zones on either of the Lakeshore lines. Tickets are generally issued for trips between a fare zone inside Toronto and a fare zone outside the City of Toronto, even if they lie in different fare corridors; such tickets are valid between the fare zone outside the City of Toronto to any fare zone inside the City of Toronto for which the ticket value is equal or less. (For example, a ticket from Square One Bus Terminal to Scarborough Centre Bus Terminal would also be valid for trips to Kennedy GO Station, as the trips are of equal value, even though all three locations are on different fare corridors.) Note that Milliken GO Station, despite being physically located within the City of Toronto, is considered to be in a fare zone outside of the City of Toronto for historical reasons.

As all GO Transit tickets are only valid for continuous trips of no more than two and a half hours, multiple tickets may be needed for longer trips.

List of existing fare zones Fare zones 1–9, 19, 59, 70, 77, 79, 89 and 90 (shaded in green) are located within Toronto.

No. Name Stops Corridor 2 Toronto Union StationUnion Station Bus Terminal (all corridors except Highway 407) 2 Toronto Exhibition GO Station Lakeshore West lineNiagara Falls 2 Toronto Bloor GO Station Kitchener line 3 Etobicoke Centre Kipling GO Station Milton line 4 Metro Northwest Mount Dennis stationWeston GO StationEtobicoke North GO Station Kitchener line 5 North York Oriole GO StationOld Cummer GO Station Richmond Hill line 5 North York Finch Bus TerminalSheppard–Yonge station Mississauga/North YorkMilton (via Highway 401)Trinity Common (via Highway 407)Pearson Airport (via Highway 401)KeswickOshawa (via Highway 401) 5 North York York Mills Bus Terminal Mississauga/North YorkMilton (via Highway 401)Trinity Common (via Highway 407)Brampton (via Highway 427)Kitchener lineOshawa (via Highway 2) 5 North York Yorkdale Bus Terminal Mississauga/North YorkMilton (via Highway 401)Kitchener lineBrampton (via Highway 427)Pearson Airport (via Highway 401)East Gwillimbury (via Highway 400)Oshawa (via Highway 2) 6 Scarborough South Danforth GO StationScarborough GO Station BeavertonLakeshore East linePeterboroughStouffville line 7 Scarborough Centre Agincourt GO Station Stouffville line 7 Scarborough Centre Scarborough Centre Bus Terminal Highway 407 EastOshawa (via Highway 2)Oshawa (via Highway 401)Durham College Express 8 Guildwood Eglinton GO StationGuildwood GO Station BeavertonLakeshore East linePeterborough 9 Rouge Hill Rouge Hill GO Station BeavertonLakeshore East linePeterborough 10 Port Credit Port Credit GO Station Lakeshore West lineBrantfordNiagara Falls 11 Cooksville Dixie GO StationCooksville GO Station Milton line 12 Clarkson Clarkson GO Station Lakeshore West lineNiagara FallsBrantford 13 Oakville Oakville GO Station Lakeshore West lineHighway 407 WestNiagara FallsBrantford 13 Oakville Oakville Carpool Lot Highway 407 WestPearson Airport (via Highway 407) 13 Oakville Sheridan College Highway 407 West 14 Bronte Bronte GO Station Lakeshore West lineBrantfordNiagara Falls 14 Bronte Bronte Carpool Lot Highway 407 West 15 Appleby Appleby GO Station Lakeshore West lineNiagara FallsBrantford 16 Burlington Burlington GO Station Lakeshore West lineNiagara FallsBrantford 16 Burlington Burlington Carpool Lot Highway 407 WestNiagara Falls 17 Aldershot Aldershot GO Station Lakeshore West lineNiagara FallsBrantford 18 Hamilton Hamilton GO Centre Lakeshore West lineHamilton ExpressHighway 407 WestPearson Airport (via Highway 407) 18 Hamilton West Harbour GO Station Lakeshore West lineNiagara Falls 18 Hamilton McMaster University Bus Terminal BrantfordHighway 407 West 19 North York Downsview Park GO Station Barrie line 19 Vaughan Highway 407 Bus Terminal Pearson Airport (via Highway 407)Highway 407Waterloo 20 Square One Square One Bus Terminal Milton lineHighway 407 WestPearson Airport (via Highway 407)Mississauga/North YorkGuelphWaterloo 21 Streetsville Streetsville GO Station Milton lineHighway 407 West 21 Streetsville Erin Mills Transitway Station Highway 407 WestGuelphWaterloo 21 Streetsvile Winston Churchill Transitway Station GuelphWaterloo 22 Meadowvale Meadowvale GO StationMeadowvale Town Centre Milton lineHighway 407 WestMilton (via Highway 401) 22 Meadowvale Meadowvale Business Park Milton (via Highway 401) 22 Meadowvale Hurontario at 407 GO Park & Ride Kitchener lineHighway 407 WestWaterloo 23 Lisgar Lisgar GO Station Milton line 24 Milton Milton GO Station Milton lineMilton (via Highway 401) 24 Milton Milton Carpool Lot GuelphWaterloo 25 Mississauga Dixie Transitway StationRenforth Transitway Station Mississauga/North YorkPearson Airport (via Highway 407) 26 Cambridge SmartCentres iXpress StationSportsworld Carpool Lot iXpress Station Waterloo 27 Kitchener Kitchener railway station Kitchener line 27 Waterloo Wilfrid Laurier University (Laurier iXpress Station)University of Waterloo (UW Davis iXpress Station) Waterloo 27 Kitchener Charles St. Transit Terminal Kitchener lineWaterloo 28 Pontypool Clarington North Carpool Lot Peterborough 29 Millbrook Cavan/Millbrook Carpool Lot Peterborough 30 Peterborough Peterborough Transit TerminalTrent UniversityPeterborough Carpool Lot Peterborough 31 Malton Malton GO Station Kitchener lineBolton 31 Malton Toronto Pearson International Airport Pearson Airport (via Highway 407)Pearson Airport (via Highway 401) 32 Bramalea Bramalea City Centre Terminal Kitchener lineBrampton (via Highway 427)Trinity Common (via Highway 407) 32 Bramalea Trinity Common Bus TerminalWilliams Pkwy at 410 Carpool Lot Trinity Common (via Highway 407) 32 Bramalea Bramalea GO Station Kitchener lineBrampton (via Highway 427)Trinity Common (via Highway 407)Highway 407 WestWaterloo 33 Brampton Brampton GO StationBrampton Bus Terminal Kitchener lineOrangevilleBrampton (via Highway 427) 33 Brampton Shoppers World Terminal Kitchener line 34 Mount Pleasant Mount Pleasant GO Station Kitchener line 35 Georgetown Georgetown GO Station Kitchener line 37 Acton Acton GO Station Kitchener line 38 Rockwood Kitchener line 39 Guelph Guelph Central GO Station Kitchener lineGuelph 39 Guelph University of Guelph Kitchener lineHighway 407 WestGuelph 39 Aberfoyle Aberfoyle GO Park and Ride GuelphHighway 407 WestWaterloo 40 Erindale Erindale GO Station Milton line 41 Victoria Orangeville 42 Caledon Caledon Carpool Lot Orangeville 43 Orangeville Orangeville MallOrangeville GO Park & RideOrangeville Carpool Lot Orangeville 44 East Gwillimbury East Gwillimbury GO Station East Gwillimbury (via Highway 400)Barrie line 45 Queensville Queensville Carpool Lot Keswick 46 Keswick Keswick Carpool Lot Keswick 47 Stratford Stratford station Kitchener line 50 Richmond Hill Richmond Hill GO Station Richmond Hill line 50 Richmond Hill Major Mackenzie at Highway 404 Carpool Lot Keswick 51 Brooklin BeavertonHighway 407 East 51 Myrtle Beaverton 56 Bolton South Bolton GO Park & Ride Lot Bolton 58 Bolton Bolton 59 Long Branch Long Branch GO Station Lakeshore West lineNiagara FallsBrantford 60 Langstaff Langstaff GO Station Richmond Hill line 60 Langstaff Richmond Hill Centre Terminal Pearson Airport (via Highway 407)Highway 407 East 61 Maple—Rutherford Rutherford GO StationMaple GO Station Barrie line 61 Maple Major Mackenzie at Highway 400 Carpool Lot East Gwillimbury (via Highway 400) 62 King King City GO Station Barrie line 63 Aurora Aurora GO Station Barrie line 63 Aurora Aurora Carpool Lot Barrie lineKeswick 64 Newmarket Newmarket GO Station Barrie line 64 Newmarket Newmarket Bus TerminalHighway 9 at 400 Carpool Lot East Gwillimbury (via Highway 400) 64 Newmarket Davis Dr at 404 Carpool Lot Keswick 65 Bradford Bradford GO Station Barrie line 66 Deerhurst Barrie line 67 Churchill Barrie line 68 Barrie South Barrie South GO Station Barrie line 69 Barrie Allandale Waterfront GO Station Barrie line 70 Milliken Milliken GO Station Stouffville line 71 Unionville Unionville GO Station Stouffville lineHighway 407 East 72 Markham—Centennial Centennial GO StationMarkham GO Station Stouffville lineHighway 407 East 73 Mount Joy Mount Joy GO Station Stouffville lineHighway 407 East 74 Stouffville—Lincolnville Stouffville GO StationOld Elm GO Station Stouffville line 75 Goodwood Stouffville line 76 Uxbridge Stouffville line 77 Kennedy Kennedy GO Station Stouffville line 78 Gormley Gormley GO Station Richmond Hill line 79 Mimico Mimico GO Station Lakeshore West lineNiagara FallsBrantford 80 Stoney Creek Confederation GO Station Lakeshore West lineNiagara Falls 81 Grimsby Grimsby Carpool Lot Niagara Falls 82 Lincoln Beamsville Carpool Lot Niagara Falls 83 St. Catharines St. Catharines railway stationFairview Mall Niagara Falls 84 Niagara-on-the-Lake Niagara College Niagara Falls 84 Niagara Falls Niagara Falls railway stationNiagara Falls Transit TerminalNiagara Falls GO Park & Ride Lot Niagara Falls 85 Brantford Brantford Bus Terminal Brantford 86 Brougham Brougham Carpool Lot Highway 407 East 88 Durham College Durham CollegeOntario Tech University Durham College ExpressHighway 407 East 89 Malvern Centennial College Morningside CampusUniversity of Toronto Scarborough Highway 407 East 90 North Rouge Oshawa (via Highway 2) 91 Pickering Pickering GO Station BeavertonLakeshore East lineHighway 407 EastPeterborough 92 Ajax Ajax GO Station BeavertonLakeshore East linePeterborough 93 Whitby Dundas at 412 GO Park & Ride Oshawa (via Highway 2) 93 Whitby Whitby GO Station BeavertonLakeshore East linePeterborough 94 Oshawa Oshawa GO Station Lakeshore EastPeterborough 94 Oshawa Ritson GO Park & Ride Lakeshore East 94 Oshawa Oshawa Bus Terminal Lakeshore East lineHighway 407 EastOshawa (via Highway 2) 95 Courtice Courtice GO Park & Ride Lakeshore East line 96 Bowmanville Bowmanville GO Park & Ride Lakeshore East line 97 Newcastle Newcastle Carpool Lot Lakeshore East linePeterborough 98 Bloomington Bloomington GO Station Richmond Hill line 100 Ohsweken New Credit Variety & Gas Bar Brantford

List of former fare zones +No.NameStopsCorridor1Toronto Coach Terminal36SilvercreekKitchener line47Island GroveMetro Rd. at Woodbine Ave.Kitchener line48SuttonHigh St. & Burke St.48St. MarysSt. Marys stationKitchener line49Virginia49LondonLondon stationKitchener line52Port PerryPort Perry TerminalBarrie line53SaintfieldBarrie line54SunderlandAlbert St. @ River St. Barrie line55BeavertonSimcoe St. @ Mara Rd. Barrie line87GreenwoodLakeshore East line

Fare classes