I have a couple of pairs of noise cancelling headphones (both Audio Technica) and find they don't work very well when I try to lie back in my seat with an inflatable pillow. One ear always ends up too near the pillow for them and they come off.
I'm not a huge fan of in-ear monitors in terms of comfort, so what I would ideally like are some earbuds. Does anything like that exist? Or is there some other solution to this problem?