Offering discounted rates from more than 140,000 hotels and 130 airlines (including Delta, Continental and American), Expedia is the world's largest Internet-based travel agency. Expedia deals extend to hotels, car rentals, flights and cruises and can save customers up to 60% on vacation packages. Customers can book with confidence thanks to Expedia's price guarantee. If you find a lower rate, you'll get a full refund and a $50 Expedia coupon.