Also, do a search for Park, Stay and Fly in your area. The OHare Ren often wants around $179 for a park, stay and fly rate. But I've used that hotel three times for extended trips and paid between $89 and $119 by booking through the Park, Stay, and Fly website. They aren't always available when I first try to book, but if I check back often enough before my trip it opens up. I've even received points for my stay and my Platinum arrival gift each time once they attach my rewards number to the reservation. But I had to do the latter through the hotel directly after the reservation was made. Not sure every hotel will do that since it's a third party reservation.