Sorry - should have clarified. We are staying offsite and will have to check out in the morning and then plan to spend time at IOA. Does anyone know if we will be able to get a cab from the park to the airport?
You will be able to catch a cab however, you will have to walk back to the City Walk and catch it there as there is no access from Islands of Adventure.
There are always cabs waiting at the Guest drop off area. Head through Citywalk towards the parking garage. When you get in the rotunda area (the place that bags are checked) go down the escalator or the elevator and there are cabs there day and night.