Go further for less with a cheap car rental. The CheapOair discount coupon that is posted here will grant you up to a further $10 discount when you book your rental car online. This offer may only be used when booking a rental car reservation for US domestic travel. Although an expiration date has been set, we expect the offer to be ongoing and stay valid through December 31, 2018. Be sure to apply any CheapOair discount coupons you wish to redeem before completing check out. You must verify that the discount has been credited before completing your reservation. It is possible to combine the discount coupon for CheapOair with Instant Savings offers. However, no other discount coupons for CheapOair may be applied simultaneously. The discount is only given against service fees on stated routes. Additional savings will not be applied. This CheapOair discount coupon may expire before the date indicated and is subject to alteration anytime without notice.