Atlantic (train) - The Atlantic Limited

Inaugurated by the Canadian Pacific Railway (CPR) as a "limited stop" service on September 25, 1955, The Atlantic Limited used numbers 41/42 (westbound/eastbound) and took the schedule and equipment for what were previously numbered trains between Montreal, Quebec (Windsor Station) and Saint John, New Brunswick (Union Station). The service operated overnight using the CPR's former International Railway of Maine line which formed the direct route between Saint John and Montreal. Although this was CPR's first named passenger train to the Maritimes, daily passenger service had been offered since 1889.

The Atlantic Limited saw the first major change to its route around 1970 when the Saint John Union Station was demolished and CPR's Mill Street yard redeveloped to accommodate the Saint John Throughway and associated urban redevelopment. A new passenger station was built on the city's west side in the former city of Lancaster where new rail yards were developed. During the 1970s, CPR operated the service at minimal levels with usually a single 1800-class E8 locomotive (one of only three, later two, operated in Canada, both by CPR) and a baggage, coach, diner, and sleeper car. Some of the stainless steel Budd Company cars originally ordered for The Canadian also made their way onto this train and there was infrequent availability of a dome car as well.

While The Atlantic Limited name was only used officially after 1955 on the Montreal-Saint John service, the name, or a variation of it, has possibly seen use for a service which operated on CPR and CPR-subsidiary Soo Line between Minneapolis, Minnesota, via Sault Ste. Marie, Ottawa, Ontario and Montreal, Quebec to Saint John, New Brunswick, beginning in 1889 following the completion of the line to Saint John. It is possible that the name "Atlantic Limited" was officially used on the Soo Line portion between Minneapolis-Sault Ste. Marie, although only numbered trains officially existed east of Montreal between 1889-1955. An extension to the Minneapolis-Montreal-Saint John service operated between Montreal and Boston, Massachusetts (in partnership with the Boston and Maine Railroad), possibly using the name Atlantic Express.