He has been spending his time helping many fliers plot strategies for cheap trips to earn mileage.

Friendship flights would earn frequent-flier mileage that could be used on United.

In 1988, Delta started a bonus program in which frequent fliers earned triple mileage for every flight.

No flight is required to earn mileage.

The stock funds do, however, carry a 4.5 percent sales charge and money-market investments do not earn mileage.

Now you can earn mileage for doing your dry cleaning.

Passengers paying restricted fares earn mileage that is good only for travel on Midway.

After 16 rentals, the traveler will earn enough mileage for a domestic round-trip air ticket, and the program begins again.

Passengers on these routes can also earn double mileage in Continental's frequent-flier program through April 1.

But the shuttle's customers will receive some frills, like a seat assignment at the airport and the right to earn mileage in United's frequent-flier program.