Have recently acquired Audio-Technica’s active noise cancellation headphones, the ATH-ACN7.
List price is around 220$, but could get it for 130$ from Amazon. Was first thinking on buying the Bose headphones, but decided to save some money (for other gadgets).
This gadget improved my flights experience: airplane noise is bearable, and I can actually hear the music. Can sleep better, and feel more refreshed after long flights (most of my flights are longer than 10 hours).