Starting May 1, the airline will charge $8 for a pillow and blanket in coach class for domestic trips and some international flights longer than two hours.
Blankets will remain complimentary in premium-class cabins and in all cabins for other international flights.
A spokeswoman says the airline will sell a blue fleece blanket with an inflatable neck pillow in a clear zippered pouch, and will throw in a coupon for $10 off a $30 purchase at Bed, Bath and Beyond.
JetBlue and US Airways charge $7 for a blanket-and-pillow set, with US Airways adding eye shades and earplugs.