About 1.6 kilometers, or roughly one mile. See note at bottom.
Check out the links for more info on the Bering Strait, the narrowest part of which, East Cape (Deshnev) on the Siberian and Kamchatkan coast, approaches within about 90 kilometers (56 m.) of Cape Prince of Wales on the American Alaskan shore. The strait contains two small islands known as the Diomede Islands. These granite domes lie about 1.6 K, or one mile, apart and the boundary line between the possessions of Russia and the United States passes between them.
If you want to split hairs, then it's possible to be aboard a ship travelling between the two islands and at the moment the ship straddles the boundry the shortest distance between the two countries would be "one step".
Various reference sources use 2.5 and 3 miles as the shortest distances between the American and Russian islands.
The shortest distance between the United States and the Bahamas is to take a flight from Miami Florida to Nassau in the Bahamas. The distance between these two locations by commercial plane is 181.91 miles.
This is an approximate direct (straight line) distance. During actual travel, this distance may change if a different flight route is chosen. The distance between the two places in miles is:3100
The shortest distance is via Fort Worth and Amarillo using Interstate 45 and US 287, however the fastest route uses Interstate 35 North and Interstate 70 West.
The shortest direct route distance between Australia and United States is 15,187 km = 9,437 miles.
The shortest route appears to be on W Tx 21 and W US 290, 80.2 miles
The shortest distance is 1612 Miles via I44-W
The distance between the East Coast and the West Coast of the United States ranges between 2,600 and 3,200 miles, depending on the route.
Believe it or not, the halfway point between Afghanistan and Texas is somewhere in Greenland. The shortest distance between the two is over the Arctic.
The shortest distance by a "great circle" course between Swansea (Wales) and Phoenix, (Arizona USA) is 5,091 British land miles
Actually, this turns out to be more of a debate than you might think. Historically, most of us were taught the shortest distance between two points is a straight line; that is a principle of Euclid's geometry. But not everyone agrees with Euclid, and there are other types of geometry. For example, because the Earth is a sphere, and not flat as distance maps portray it, that is why some scientists say that the shortest distance is actually a sphere or a curve (in other words, the distance would be measured by following the Earth's contours).
5 hour flight from NewYork to London
San Diego to Jacksonville is 2338 miles.