I used to be a traveling (international) sales guy and flew over 100K miles yearly for over a decade and though by no mean top tier audiophile quality, if you travel often and long on planes, nothing beats Bose Quiet Comfort noise cancelling headphones. Super comfortable and do help keep the noise down when on the plane, plus, makes listening to music or watching movies much more enjoyable than the cheap freebie earbuds. I've had multiple versions of them and the upgrade program is not too bad all things considered.
What they have yet to figure out is their permanent flaws: 1- ear cushions are so soft that they easily tear leaving a mess on your shirt that looks like a severe case of dandruff (only black...) and 2- flimsy battery door hinges (have to be extra careful with them)
https://www.bose.com/en_us/products/headphones/noise_cancelling_headphones.html