97 miles
126 miles
It is 145 miles from Key Largo to Marco Island via FL-90 N/US-41 N.
Key Largo, Marathon, Key West,
It is 424 miles according to Google Maps.
50 miles following U.S. 1 (Overseas Highway).
It is 97.6 miles according to Google Maps.
49 miles
According to MapQuest, it is between 47-57 miles, depending on which route you chose.
Tampa to Key Largo is about 300 miles. Tampa to Key West is about 400 miles.
The north end of Key Largo is Mile Marker 106 and Key West is located at Mile Marker 0 (although you reach the entry to the island around MM 3 or 4). It should take you about 2 hours, perhaps a little more depending on where in Key Largo you start.
7 miles.
69.8 miles