United is revamping its Mileage Plus pricing structure, bringing in a flexible system which will “fluctuate based on a variety of factors, including demand”.

From November 15 the carrier will no longer publish an award chart detailing the set amount of miles needed for a flight redemption.

United said that “Some award prices will be lower than what’s currently published in our chart”, adding that “You may have already seen these prices, and you’ll be able to get them immediately”.

In particular the carrier says that “Air awards to US and Canadian destinations that are 10,000 to 12,500 miles today may be available for less moving forward”.

But it also warns that “Other award prices may be higher than what you see today, especially if you’re traveling at a popular time”.

In an update on United’s website the airline said:

“Increasing award prices for the most in-demand flights allows us to offer lower prices on other flights. If your award travel is flexible, these updates will help you make the most of your miles.”

In addition the carrier is removing “close-in fees” from November 15, so members will no longer be charged up to $75 for booking last-minute award travel.