The distance from the northern US border with Canada, to the US southern border, with Mexico is NOT A SET DISTANCE. The border is not a straight line, at all. It does have many bends and in some places follows a river such as the Niagara river.
Shortest by Interstate Highway: If you take the I5 between Douglas British Columbia/Blaine Washington and Tijuana/ California it is 2221km (1380mi).
Longest by Interstate Highway: If you take the I29 and I35 between West Lynne Manitoba/Pembina North Dakota and Heroica Matamoros/Brownsville Texas and it is 2833km (1760mi).
The furthest away from the Mexican Border you can get along the Canadian Border would be Van Buren Maine 4207km (2614mi).
The direct North-South distance as the bird flies ranges from 1812km (1126mi) at the closest between Kootenai National Forest Montana and Mexicali California/Los Algodones to 2578km (1602mi) between 4.3km (2.7mi) East of West Lynne Manitoba/Pembina North Dakota and Barranquitas/South Point Texas.
395 miles
The distance from the northern border of India to the southern border is 1,997 miles. The country is almost as wide as it is tall with the distance between the eastern and western borders being 1,822 miles.
211 miles
2,000 miles
The distance between the Northern Border of England and the Southern Border of England is 402 miles or 667 kilometers. Marshall Meadows in Northumberland is the most Northern city and Lizard, Cornwall is the most Southern city in England.
696,970 mi
300 miles
310 miles
211 miles
310 miles
211 miles
It is the southern border for Texas; conversely, it is the northern border for Mexico.