The Continental OnePass, originally offered by the now-defunct Continental Airlines, was a frequent flyer program that offered free tickets, discounted airport lounge memberships and first class upgrades. Members earned miles by flying with Continental Airlines or partner airlines. The OnePass replaced the former frequent flyer program, TravelBank, when Continental merged its program with that of Eastern Airlines in 1981. The name OnePass implied that members were able to earn miles from two airlines by using one program.
Continental Airlines' OnePass program dissolved when the airline merged with United Airlines in 2012. OnePass benefits were still accessible by members under the name Mileage Plus, which was originally an exclusive United Airlines frequent flyer program. The merged company chose to keep the Mileage Plus name because it had a greater number of participants than OnePass.
The award levels maintained by the Mileage Plus program are similar to those of OnePass. They are designated into categories like Silver, Gold and Platinum Elite, and Mileage Plus upgrades are comparable to those of OnePass. However, the program differs in that Mileage Plus miles expire after 18 months of inactivity, whereas OnePass miles never expired. Other differences include the number of miles earned on international trips.