How many miles is between Florida and Virgin Islands?

From Government Cut Miami, FL (25 deg. 45 min. 7 sec. N - 80 deg. 07 min. 6 sec.W) to San Juan, PR (18 deg. 28 min. 3sec. N - 66 deg. 7 min 5 sec. W) is 797 Nautical miles, from there Saint John's Cruz Bay is 82 Nautical miles, totaling 879 Nautical miles you could probably trim a little by running direct on the inside.