This deal has ended.
A much cheaper alternative to the $299 Bose Quiet Comfort Headphones are the Aiwa noise-canceling headphones. Amazon.com has them for the lowest price yet: $13.19. They reduce exterior noise by more than 70 percent. Plus the folding design allows for easy storgae. Included is a soft carrying case and an airline adapter plug. Spend $25 and shipping is free.