Just thought I'd share this info here
I found a really cheap vacation package for flying from Iowa to Seattle at CheapTickets.com. Ended up costing only 283.21 per person. Thats pretty cheap compared to the $414 for plane ticket only. Its an American Airline filght with a Hertz compact car rental.
I'm going to call cheaptickets just to make sure theres no other hidden costs. If your still looking for plane tickets, try running a search through here with a Flight+Car rental to see if its much cheaper than plane tickets alone.
Check out the PDF for the order details.Order Info