US will hold a non-refundable ticket for 24 hours by telephone prior to purchase, but after purchase there are no refunds.
Policy from the website, you know CUSTOMERS FIRST!
http://www.usairways.com/awa/content...rviceplan.aspx
Allow reservations to be held or canceled
Each airline will allow the customer either to hold a telephone reservation without payment for 24 hours or (at the election of the carrier) to cancel a reservation without penalty for up to 24 hours, in order to give customers an opportunity to check for lower fares through other distribution systems, such as travel agents or the internet.
US Airways will hold a customer's reservation without payment or penalty for a maximum period of 24 hours. This policy applies to refundable as well as non-refundable fares.
A telephone reservation is defined as an itinerary or trip for which payment has not been received. Purchased, refundable tickets (paper or electronic) will be refunded via the US Airways refund department regardless of when the tickets were purchased. Changes made to the itinerary after purchase will be assessed the current change fee regardless of when the tickets were purchased.