As of 2015, MileagePlus program members can use awards towards travel on United Airlines and with its affiliated partners. United Airlines determines the amount of mileage necessary to receive awards and establishes the process for award redemption. MileagePlus awards and benefits are subject to change at the company's discretion.
Although program members may purchase travel using MileagePlus awards, travel is not exempt from tariffs, contract of carriage, ticket terms and re-accommodation policies. Members using MileagePlus rewards may also be responsible for departure taxes, federal inspection fees and passenger facility charges. In addition, changes made to reward tickets may incur service fees. United Airlines lists the specific service fees on its website.
If a MileagePlus member does not use the reward ticket, he may return the miles to the MileagePlus account for a service fee. Miles are still subject to expiration, and United Airlines does not accept returns on all award tickets.
In addition, United Airlines is not liable for service changes or travel cancellations. The airline does not allow upgrades on promotions, group rates, special rentals or tickets, or industry discounts.
United Airlines restricts the sale or trade of MileagePlus miles or benefits. Selling or trading MileagePlus benefits can lead to membership termination.
For a complete list of MileagePlus program rules, visit the United Airlines website.