Slim chance, especially outbound where you will also have to collect your luggage and re-check-in. However if US Airways are selling it as a through ticket it's their responsibility to get you to your destination, ie they accept liability if their service is late, or the connection just doesn't work. So you could go with that in your back pocket. The only other factor is when you're returning, the next flight is a day later, and US Airways are highly likely to leave you high and dry for the 24 hours, ie accommodation etc is at your expense.