I guess the best answer is, it depends...what day of the week are you arriving at FLL, and what time of day? If you're flying in on a weekend, figure somewhere between an hour and an hour and a half to SoBe, assuming you're driving and taking 95 and the MacArthur Causeway. If you're traveling during the week any time around rush hour, all bets are off.
Taking a typical route (interstate and such), it's 28 miles (and some feet). Traveling speedlimit speeds (not rush hour), should be around 40 minutes or so. That's with few red lights.
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