Way before my time, but the old international airport in Nassau, Oakes Field, was completely abandoned as the city encroached on it. I haven't seen an overhead shot of it for years, but I believe that some of the runways are still present, albeit now weed-filled, cracked, and potholed.

Windsor Field (NAS) replaced Oakes Field.

The DEA 'acquired' MYGT (Georgetown, Exuma) from the Bahamian gov't in the '90s, and all civilian aircraft were relocated to the remote Mosstown airport.

Andros Central was abandoned after WWII.

I'm not sure if Grand Bahama US AUX-AF is still being utilized at all.

Mayaguana was abandoned for a time before UP started commercial operation on a section of the still-usable airfield in the '70s.