Philly to AC in July/August

Hello. A little help. I live in Miami and am coming up to Atlantic City during the summer. Only Spirit flies to AC directly from Fort Lauderdale. So, instead I want to fly to and from MIA to PHL, to avoid Spirit (which is horrible).
What is the ballpark rate from Philadelphia to AC; probably Botgata. Either the X rate or a private service. I'm in the business so I expect to tip an additionally 15-20% in cash.
If anyone can do a round trip, even better.
Thanks in Advance, Anthony