Airlines are changing their frequent flier programs in other ways as well: American Airlines AAL, -0.57 % changed its rewards structure in April (for travel beginning in June) so that for about half the year it will increase its redemption rate to 30,000
miles, up from the previous 25,000
miles, and on the
busiest days will charge 50,000
miles; however,
during less
busy times, it will lower the rate to 20,000
miles.