Originally Posted by
calin_z
....I found that somewhere around 40-50% of the passengers on a plane do not have a FF number at all (let alone medallion status) and therefore do not collect any FF mileage credit for the respective flight....
Domestic or international?
It should be even higher for transpacific flights as many Asians don't sign up for FFPs. Many of them are on group fares and many Asian airlines don't give mileage for group fares. They don't bother to sign up even though DL may give mileage for group fares.