The Gull was an international passenger train service between Boston, United States, and Halifax, Canada, which operated from 1930 to 1960.

Westbound trains left Halifax shortly after breakfast and crossed the Canada–United States border in the late evening, as eastbound trains were leaving Boston's North Station to cross the border about dawn.

[1] Until 1946 the Gull made connections with Canadian National branch line service at Saint John to Prince Edward Island and at Moncton to Newfoundland via Sydney, Nova Scotia.

Stainless steel sleeping cars were delivered to the Bangor & Aroostook and Boston & Maine in 1954.

[5] Without direct connections to Boston, the service was uncompetitive with highway trucks and was discontinued 30 September 1963.