United Airlines enhanced its MileagePlus rewards program for co-branded credit and debit cardholders.

Changes apply to tickets purchased on or after April 2.

Cardholders earn up to double the miles on United flights compared to non-cardholders.

Members receive at least a 10% discount on all United flight award tickets.

United expanded Saver Award inventory in the Polaris business class to all cardholders.

This inventory was previously restricted to higher-tier status members.