1.   AMR Investment Services, a corporate sibling of American Airlines, has been offering a mileage program for more than four years.

2.   American Savings is considering expanding the airline mileage program later this year to other products, including CDs and home mortgages, Robinson said.

3.   A large obstacle to eliminating corporate frequent flier miles is that the carriers themselves want to preserve the mileage programs.

4.   The airline, for example, recently created a separate marketing division specifically for its Aadvantage frequent-flier mileage program.

5.   The airlines said the initial move will enable passengers to choose which mileage program they want credited for a flight on either carrier.

6.   These groups offer bonus miles as sales inducements or rewards for every dollar spent, or they accept credit cards tied to mileage programs.