Kings Island offers a meal deal of entree, side and drink for $14.99. They also offer an "all day dining" option for $29.99. You can order a meal every 90 minutes all day long.
Or, you can leave the park and walk to your car (10 minutes) and drive to a Chipotle, Taco Bell, Outback, Buffalo Wings and Rings, McDonalds, Wendy's, Popeyes, Viva Tequila Tacos and Bar, El Rancho Nuevo, Dairy Queen, Jimmy Johns, Ruby Tuesday plus sushi, chili, pizza, subs, "diners", etc. all a mile down the road. If you run through the drive-thru you could have your food and be back at the park for a total trip time of 30-40 minutes.
It's not quite the same when you are in the MK. To leave you have to wait for a boat/monorail to get to the parking lot, (10 min) then a tram to your car (5-10 min), then drive at least 15 minutes to the nearest non-Disney restaurant off property. We are talking an hour to two hours (depending on restaurant) if you want to leave and come back. So, Disney's food prices are a little harder to navigate around.