Car rental prices at Stansted airport are already cheaper than most places because the size and busyness of the airport has attracted a large number of car hire companies to do business there, thus the competition has brought prices down significantly. It is possible to reduce these prices further though by using coupons when booking your car rental. The majority of car hire companies have places on their website booking forms to enter a customer number or coupon code. A customer number is if you’ve used the company before and they may offer you a loyalty discount for using them again, and a coupon (sometimes called promo code or promotional code) is a code you’ve received somewhere to get you a discount on a particular company’s car hire. You may get these codes in your emails if you have subscribed to a car hire company’s newsletter or other travel organisation’s newsletter, such as an airline or travel agent. You can also find these codes on the website by using a search engine to find a website that offers voucher codes to the public to use to get discounts on car hires. These codes are well worth using as they can sometimes dramatically reduce the cost of your car hire.