If you just want to block out noise, can you not just use $3 disposable ear plugs? They're way more comfortable, way more effective, infinitely more portable, don't run out of power, can stay in during take off and landing, and you can lean against a pillow.
I have the wh1000xm2's (which are great), and I much much prefer earplugs when I don't need any audio, such as when I'm sleeping.
Seriously, for blocking out sounds, try simple disposable high db earplugs instead of bulky noise cancellation headphones. I guarantee it'll win you over.