Advance reservation is required. Earn 50 miles per day for qualifying rentals of one to four days, and earn 500 miles for qualifying rentals of five or more days. The additional 1,000-mile online booking bonus will be awarded only on rentals booked through this site and completed by June 30, 2011. To be eligible to receive miles, completed rentals must include United Mileage Plus number. Offer valid at participating Hertz locations worldwide. This offer has no cash value, may not be used with pre-pay rates, tour rates or insurance replacement rates and cannot be combined with any other certificate, voucher, offer or promotion. Hertz age, driver, credit and qualifying rate restrictions for the renting location apply. Taxes, tax reimbursement, age differential charges, fees and optional service charges, such as refueling, are not included. The CDP savings of up to 35% applies to time and mileage charges only; discounts vary by rental date, location and vehicle type. Miles will not be awarded on travel industry rates, wholesale tour packages, insurance/dealer replacement, any other promotional rates, or group travel.