Hi,
We drive from Philly to Baltimore to fly SWA to Orlando. We really love the airline. My kids are under 6 and SWA has always been great with them...unlike USAir which we've used in the past. The airport is nice, you are permitted to pre-board with small children and check the stroller at the gate. The flight attendants usually pass out coloring books and "wings". For us, it's definitely worth the drive.