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 and 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".