I get to my destination and turns car off and whenever I try to start the car again it won't start then I sit about 15to30 minutes it will start again but this keeps happening...what's wrong with it

Sometimes a fuel delivery concern will resolve after the system cools -- but this is a wild guess. You'll need to see what necessary element is missing when the problem occurs -- fuel, ignition spark, intake air. www.repairpal.com/repair-shops