Glacier Park Airport
If you are in Massena New York it would probably be Cornwall Canada. The Capital of Canada (Ottawa) is only 60 miles from the US Border and Montreal (Quebec's largest city) is also only 60 miles from the border.
Canada and Mexico border the U.S.
Canada is close to the US but does not share a land border with it. They are separated by the US-Canada border which is the longest international border in the world.
The nearest U.S. border crossing at Prescott, Ontario/Ogdensburg NY. Or at Cornwall - Massena or St. Regis, NY.
There is not CLOSE border crossing between Texas and Canada, but you probably go through Detroit.
Canada and Mexico share land borders with the United States, making them the closest countries to the United States. The closest country to the US with which the US does not share a border is Russia, at the Bering Strait.
The closest US state to Ottawa is New York. The distance from Ottawa to the NY state line is about 56.2 miles / 90.5 km.
Ottawa ON
The US-Canada border is the longest border in the world. It stretches for 8,891 km.
not counting the Mexican & Canadian borders which of course touch the united states directly on land the closest border is with russia in the sea between the diomede islands off the coast of Alaska the closest border that isn't an American border is the one between Canada & France in the sea between Newfoundland & saint Pierre the closest land border that isn't an American border is the one between Mexico & Belize in central America
No, Ontario has the longest border with Canada and the US.