After flying on the itinerary from hell, with bags that have yet to make it back to us, we have an AA "Transportation Voucher Exchange Coupon".

My question is: Can I use this with US Airways flights, when I book with US Airways.

I know US flights are cross marketed from both airlines, and I can purchase the flights from either airline, but when I draw up an itinerary with the exact same flights, US is $464 (Coach Non-Refundable) and American is $1311 (Choice). For the exact same flights.

I'm not sure if I'm doing something wrong? But I would think the same flights being sold by what should be operating as the same company would be the same price?

So can I book via US Airways and use my AA voucher?