I am even more committed to using my frequent flyer miles for upgrades to business class for future long - haul flights, seeing the value in arriving refreshed and well - fed. (theprofessionalhobo.com)
Sometimes airlines hold online auctions that enable economy class passengers to bid for upgrades to business and first class. (raytravelsfree.com)
Special offers vary but usually you get a discount up to 30 % of the airfare price or free upgrade to business class in case if you bought a full fare economy class ticket. (effectify.com)