They include double mileage on new routes, extra miles for using electronic check-in and alike.

However, United plans to eliminate many bonuses, including the common practice of giving credit for double mileage when full coach fare is paid.

To inaugurate the affiliation, the program will offer double mileage on rentals for two days or more that begin on Sunday, Monday or Tuesday through June 15.

The miles will also be harder to accumulate, since many special bonuses - such as double mileage for full coach fares - will be eliminated.

Breakfast is included, as is double mileage on 22 major airlines' frequent-flier plans.

The Sheraton Club program is offering double mileage at 120 participating hotels, most of them until March 15, but some longer.

Northwest offered double mileage except on flights to the Pacific if its WorldPerks member flew one round trip before March 31.

You get double mileage out of the same scene.

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

While drawing up the guest list for a surprise 60th birthday party for Mr. Levine this month, she decided to get double mileage out of the event.