Airlines make nearly all their fares that are available to the general public available through all channels, from full fare down to their most heavily discounted fares. Any normal fare, made available months in advance in the normal way, is made available through all channels. Web fares, however, are different than normal fares. They typically constitute less than one tenth of 1% of the fares an airline offers, and are normally made available only a few days before flight time, and only on flights which have an unusually high number of empty seats. Web fares thus are seldom available, are unpredictable, and are offered at very low prices.

Airlines make nearly all their fares that are available to the general public available through all channels, from full fare down to their most heavily discounted fares. Any normal fare, made available months in advance in the normal way, is made available through all channels. Web fares, however, are different than normal fares. They typically constitute less than one tenth of 1% of the fares an airline offers, and are normally made available only a few days before flight time, and only on flights which have an unusually high number of empty seats. Web fares thus are seldom available, are unpredictable, and are offered at very low prices.