All scheduled passenger trains in Toronto run into and out of Union Station which is located at 65 Front Street, between Bay and York Streets. Opened in 1927, Toronto's Union Station is generally considered to be one of the grandest, most impressive train stations in North America; with an enormous great hall, the ceiling rising to a height equivalent to seven stories. Despite this impressive hall, most of the activity in the station takes place in the underground concourses which link the commuter rail platforms with the subway station. The great hall is still used for purchasing intercity rail tickets with a row of ticket booths and several ticket machines. The train station is served by a subway station with the same name, accessible from the GO concourse. The main intercity concourse is accessed from the great hall, but all commuter rail platforms are accessed from the underground GO Transit concourse, as is the Union Station Bus Terminal across the street. The GO Transit concourse is accessed by taking any one of the three large staircases in the great hall or directly from the subway.
Most intercity rail travel in Canada is provided by VIA Rail. Union Station is one of VIA Rail's main hubs and connects several of their lines. Railway lines operated by VIA Rail out of Union Station include:
Corridor: This is VIA's most profitable line running from Windsor and Sarnia in the southwest to Quebec City in the northeast. Regular trains run from Toronto directly to Montreal, Ottawa, London, Kingston, Windsor, and Sarnia as well as stations in between. The lines between Montreal and Toronto and Ottawa and Toronto are VIA's busiest and most frequent, they also have the largest discounts if booked well in advance.
Maple Leaf: This service is run jointly by Via and America's passenger rail company, Amtrak . Trains on this line run between Toronto and New York City once a day in each direction stopping at Albany and Buffalo as well as many smaller stations. Trains between Toronto and New York are extremely slow and very expensive, the coach services listed above generally take several hours less and cost several times less than the train. There are also more frequent trains that run on this line from Toronto to Niagara Falls.
The Canadian: Trains on this line run the transcontinental route from Toronto to Vancouver three times a week each way, stopping at a large number of smaller stations on the way. Cities that this train passes through include: Winnipeg, Saskatoon, Edmonton, Jasper and Kamloops. The full journey takes about three days. This is one of the most expensive rail journeys in North America and is many times more expensive than flying.
Ontario Northland  is a Government subsidized passenger rail service into the scarcely populated north of Ontario. They run trains on a single line from Toronto to Cochrane, Ontario six times a week. Most of this line is single track and owned by freight companies, as a result, whenever a freight train passes, the passenger train must move onto a siding and wait for the other train to pass, therefore Ontario Northland trains are generally 1.5;2.5 hours behind schedule at either end of their route.
Commuter train services in the Greater Toronto Area are operated exclusively by GO Transit who run all of their trains from Union Station. Their trains serve mainly the sprawling suburbs around the city and most of the train lines run only during rush hour; at other times of the day, they are replaced by bus services. Most of these buses originate from Union Station Bus Terminal across Bay Street from the railway station, there is an overhead walkway from the GO Train concourse underneath the railway platforms to the bus terminal.