I booked three flights with the same fare. When I made the reservation, it said that the total including taxes was $700.90. When I paid, I used a credit card with the billing address in U.S, and two credit cards with the billing address in the DR. When I got the receipt and e-ticket confirmation, they charged extra 77 dollars to the DR credit cards. They don't notify you this charge until you purchase the flight and get the receipt 1 hour later. God Bless American Airlines, "We know why you fly"!.