—>Providing that you check your bags online at least one hour before your flight, US Airways says it will begin charging $20, instead of $15, for the first checked bag and $30, instead of $25, for the second. Those who choose to check bags at the airport can expect $25 for the first and $35 for the second, an increase of $5 per bag.

Elite frequent fliers, first-class passengers, and active-duty military personnel are exempt from the fees.

Here's a lovely chart they have provided for your edification.

Baggage policy [US Airways]
(Photo:balmes)