American Airlines is raising its checked bag fees and overhauling how customers earn miles

• American Airlines is raising its bag fees beginning Tuesday.
• The Texas-based airline is also changing how customers earn frequent flyer miles and loyalty points.
• The changes incentivize customers to book directly with the airline. 

American Airlines is making checked bag fees more expensive while also tightening its policy on which travel agency bookings can earn frequent flyer miles.

Beginning Tuesday, the fee for a passenger's first checked bag on a domestic flight is $35, if they pay online. If you pay in person, the fee is $40. A second bag will cost $45 to check regardless of whether you pay online or at the airport.