I have a pika packworks case. Works great. No damage. No additional fees

One important thing to consider if you're flying with a case -- what are you going to do when you land? Fortunately the Pika is narrow enough to fit in the backseat of a cab. Anything larger and you'll need a van to carry. Also, where are you going to store your case? If you live in a big house with a basement, probably not an issue. But for smaller homes, a big old case that doesn't fold flat is a storage pain.

Another word of advice -- whatever case you choose, make sure that no loose parts are in the bag. Easy way to damage a bike is to have a loose piece -- say a pump -- function as a wrecking ball when your bag gets tossed around.