Below is a list of all U.S. Rental car companies that will allow you to book your car rental online. 

Insurance tip: When you go to pick your car up, you don't have to accept the extra insurance they offer your Auto Insurance coverage covers rental vehicles.  The fees for this additional insurance can cost as much as the daily rental rate at times and as long as you check with your current insurance provider prior to picking up your rental car, you can avoid paying for coverage you already have.

Cost savings tip:  Weekend rates are almost always cheaper than weekday rates and often a 7 day rental is cheaper than a 4 weekday rental.  If you have flexibility on your travel dates, always try to include a Saturday as part of your rental dates to get the best deals.

Site Name and Brief Description	Current Specials
Advantage - Over 150 locations throughout the Western United States.  Locations in Latin America and Europe.	And from Expedia:
Alamo - One of the world's largest rental car companies. Alamo services the most popular domestic and international travel destinations by providing quality vehicles and excellent customer service.	And from Expedia: Alamo: Compact from $22/day on weekends
Avis - Avis Rent A Car System, Inc. and its subsidiaries operate the world's second largest general-use car rental business, providing business and leisure customers with a wide range of services at more than 1,700 locations in the United States, Canada, Australia, New Zealand and the Latin American/Caribbean region.	Avis: Save $50 on a weekly SUV rental for your ski vacation! Rent an SUV in top ski destinations and save!
Budget - Budget Rent A Car System, Inc. is one of the world's best-known general-use car rental companies with over 1,800 locations in the U.S., Canada, Latin America, Caribbean, Australia and New Zealand. Save $15 on Weekly Car Rentals with Budget! thru Sept 30, 2006
Dollar Rent A Car- Reserve your next rental car through our convenient and secure online car rental reservation center with approximately 400 worldwide locations in 26 countries, including 260 in the United States.
Enterprise - Enterprise has locations within 15 miles of 90 percent of the U.S. population.  Want to rent a hybrid? Reserve a hybrid of your choice at Enterprise.com
Fox Rent a Car - Established in 1989, Fox Rent a Car's mission is to earn the total trust and loyalty of every customer we meet and serve, by providing the best customer service at the most competitive rates through the use of technology and employee motivation.
Hertz - The largest car rental company in the world, providing quality rental service for 80 years.	Hertz car rentals from $119 per week
National - National Car Rental operates in over 3,000 locations throughout the United States, Canada, Europe, Latin America, the Caribbean, Asian-Pacific, Africa and Australia.
Payless - With over 135 locations worldwide, Payless is an international firm with a customer service focus.
Thrifty - You'll find convenient, friendly Thrifty Business Car Rental counters in more than 120 airports in North America.  There are lots of places you can book a Thrifty rate on the web, but there’s only one place you’ll find our BEST rate every time. With Thrifty's "Best Rate Guaranteed Offer", you can have the confidence of having the best Thrifty rate anywhere. In fact, if you find better, we’ll not only match it, but we’ll also give you a 10% discount!