All of the major rental car companies are represented at the Phoenix Sky Harbor Airport rental car center. We’ve included photos of their rental desks at the site to give you a flavor for who has the deluxe offices, the shared offices, and the representative length of the waiting lines during our visit. You should shop carefully for rental cars in Phoenix and test a good variety of combinations of discounts at the different rental car companies. Hotwire.com is always a good benchmark for the current “minimum” level of rental car companies, but it requires a substantial prepayment commitment. We’re a fan of multiple rental car reservations combined with coupon codes. Costco’s Travel Magazine available in stores and on their site is one of the best sources for discount rental car coupon codes in Phoenix.