This cannot be answered properly without knowing how fast you are traveling.
It is 674 miles according to Google Maps.
674 miles @ 21 mpg will require 674/21 = 32.1 gallons (approx).
At an average 60 mph: 11 hours, 14 minutes
It depends on your altitude and the speed at which you are flying at... and whether you have a head wind or tail wind but approximately 2.5 hours...
3 miles 674 yards - 1020 yards = 4934 yards.
418.89
674 miles
674 air miles.
The Keys are 120 miles long. Hilton Head to Key West is 674 miles.
674 miles
674 miles
The shortest driving distance is 674 miles.