PHL-CLT-RSW-PHL is $232 same day return 12/31, 2045 miles. To buy, click on the "Book with U.S. Airways" link, it will take you to the airline site and you can buy it.
https://www.google.com/flights/#sear...=ONEWORLD;eo=e
This thread may give you some insight as to how to use google.com/flights.
http://www.flyertalk.com/forum/milea...-year-end.html
Last edited by jbeckett; Dec 22, 2014 at 10:30 am