We live in Maryland and the kids wanted to go to Hershey Park, Pa for a weekend last Sept. I did the math. Drive two hours north, gas, hotel, park admission and food (can't take food in the park), came up with $400 ballpark.
We fly free so we flew down to MCO Friday night, took ME, stayed in Pop for $89 per night, brought our own food. We went to Blizzard Beach all day Sat and flew back Sunday Morning. Spent around $220 including airport parking.