Your lifetime flight mileage balance includes all United flight miles since you enrolled in MileagePlus. It is important to note that prior to December 1, 2011, the MileagePlus and OnePass programs tracked lifetime activity differently. MileagePlus counted only base EQM (Elite qualifying miles) earned based on the flight distance of United- and United Express-operated flights, while OnePass counted both base PQM (Premier qualifying miles) and additional PQM (those earned on partner airlines or through promotions or certain credit cards).
To bring everyone to the same starting point, on December 31, 2011, we re-calculated the lifetime mileage balance for all MileagePlus members to include additional EQM earned since enrolling in the program. For MileagePlus program members who also had a linked Continental OnePass account, we combined the lifetime flight mileage balances of both accounts. This balance was reflected in accounts on January 1, 2012.
Additionally, for those who were members of the original Continental Airlines TravelBank Frequent Flyer program (from the 1980s) and/or the Eastern Airlines Frequent Flyer Bonus program, we also included the mileage balance from these accounts based on the date they were merged into the OnePass program.