You will need to use your Promo Codes at Cleartrip by following these steps: Sign in to Cleartrip, select the items you want to buy and add to your cart. Next, click on [Proceed to Payment], below the items listed, you will see a box that says [Add Coupon Codes]; tick the Cleartrip Coupons of your choice and automatically return to the checkout page, You will see that the actual payment total has been reduced.