Enterprise: Weekend Rates from $9.99

Special weekend rates on economy and compact cars from
Enterprise.

Hertz Rental Cars: $50 to $75 Off

Save $15 per day (up to $75) off a Prestige collection
rental, or save $50 off a Hertz Adrenaline car.

Budget: 35% Off Prepaid Car Rentals

Budget's ongoing "Pay Now" promotion offers discounts of up
to 35 percent off a car rental.

BritRail Seasonal Sale: 20 Percent Off

Winter discounts from Britrail make both consecutive-day and
flexible passes more affordable.

Enterprise: 5% Off for AARP Members

Receive a five percent discount on daily, weekly, and monthly
car rentals from Enterprise.

Alamo: Free Upgrades on Compact to Mid-size Cars

Alamo is offering one free car class upgrade on car rentals
in the United States and Canada through December 31, 2011.

Rent Twice From National, Earn a Free Rental Day

Between August 22, 2011, and January 31, 2012, Emerald Club
members will receive a free rental day after every two rentals of
Midsize or larger cars for two or more days.

Dollar: 15% Off Car Rentals in Canada

Have an American Express card? At participating locations in
Canada, you can receive up to 15 percent off when you pay for your
rental car with an American Express card through December 31,
2011.

European Rental Car Discounts, Upgrades

AutoEurope is running three short-term December promotions,
which include discounts of up to 20 percent on Mercedes rentals,
free GPS service, and one-class upgrades in Israel.