Key West Transit can get you from the airport to anywhere in the island. The Blue Route runs clockwise around the island, and is the fastest bus to the tourist district around Duval Street. The blue bus leaves the airport every 90 to 120 minutes and runs from 7:03am to 8:39pm. The Green routes take a longer route, but can still get you where you want to go in a timely manner. It operates from 6:25am to 9:00pm every 90 to 120 minutes. All buses run 7 days a week. Allow ample time to check in if you take the bus back to the airport. The bus stop is outside the terminal near the far left corner of the building as you exit. Look for the green and blue reflectors on the sign. The web site is www.kwtransit.com, or call 305-809-3700. Fare is $2.00.
Key West Transit also serves the airport with the Lower Keys Shuttle, which connects the airport with all of the lower keys between Key West and Marathon Key. The shuttle departs the airport every 90 to 120 minutes from 5:46am until 9:53pm. The bus does not necessarily stop at the airport on the return trip, so ask the driver about this when you board. Fare is $4.00.