If you do then you might want to get your own blanket and pillow set to take onto the plane. This way you won't have to worry about what's on the ones that the airlines gives you.
This Airline Comfort Set has a Silk Noil Blanket, Silk Pillowcase that can fit over an airplane pillow or travel pillow and silk eyeshades to soothe eyes and block out light. All three pieces roll into a 12" bag and weigh about 1lb. so it's not too much to take onto the plane.