It is around 324 miles from Destin to Jacksonville.
In this day and age it seems like teenagers start dating at a younger and younger age. Around 16 seems to have always been the acceptable standard, and that's pretty much what it has remained.
Take I-10 West to exit 70. 285 South to Niceville, 293 South to Destin. It takes about 5 hours. If you get bored with the interstate, you can take any of the routes south (231, 77, 79, 331) They will connect with 98 West which heads up the coast to Destin. Pretty, but longer.
Atlanta, GA to Destin, FL is 315 road miles.
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The distance between Destin and Jacksonville is around 350 miles, which would take roughly 6-7 hours to drive without traffic. The most common route is to take Interstate 10 East, which is a straightforward journey across northern Florida. Additionally, there are various stops along the way, such as Tallahassee and Lake City, if you need a break during the trip.
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