United sent out an email for rental car offer for both Hertz and Avis. You can choose between up to 1500 bonus United miles or $30 flight credit on car rentals of 7 days or longer between now and April 30, 2013. You can access this offer on United’s website here.
The number of bonus miles or TravelBank dollars that is dependent of the time of the car rental:
These bonus miles or TravelBank dollars are in addition to the regular miles you would earn as a base or premier member of Mileage Plus. You will also earn a booking bonus for making the car rental on United’s website.
There are always number of bonus miles offers for car rentals. I don’t have problem taking advantage of them as long as they don’t jack up the price of the rental exorbitantly as they often do making the bonus miles very expensive.