US Airways charges $150 to have a domestic ticket re-issued at a lower available fare. So if the price of your flight drops in excess of $150, you can obtain a "Low Fare Guarantee" credit for future travel on US Airways. Similarly, US Airways charges up to $250 to have an international ticket re-issued at a lower available fare.
To obtain the refund you must call US Airways Reservations: 1-800-428-4322.
US Airways policy refers to travel credits as "Low Fare Guarantee" credits. The customer is eligible only if they meet the following criteria: