Bose QuietComfort 15 Acoustic Noise Cancelling Headphones – Link 
These rarely ever go on sale, but Amazon has this highly rated noise cancelling Bose headphones, currently marked down to just $239.99 w/free shipping.
- The best around-ear Bose headphones reduce noise across a wide range of frequencies
- Enjoy music and movies with clear and lifelike sound
- Comfortable, around-the-ear fit; ideal for frequent flyers
- Includes airline adapter, carrying case, and two audio cables – one with mic/remote for iPhone/iPod control and hands-free iPhone calling
- AAA battery included: 35 hours average life