Can I give my customers a discount code they can type in at checkout on my website?

Yes, in most cases you can create discount codes that your customers enter at checkout, although how flexible those codes are will depend on the plan you are on and on the products you have switched on.

The usual way it works is that you create the code in your admin area, choose whether it takes off a percentage or a set amount, and then decide where it applies. You can normally set a start and end date, restrict the code to one product such as hotels, limit how many times it can be used in total or per customer, and switch it off again at any time without touching the rest of your site. The important thing to understand is that the discount comes out of your own margin, not out of the supplier's rate. The supplier still has to be paid what they quoted, so whatever the code gives away is taken from the markup you added. It is worth checking your markup before you promote a code, otherwise a generous offer can leave you with very little on the booking.

There are limits to be honest about. Codes only work on the part of the booking you control, so you cannot discount below the net rate a supplier gives you. Some flight content comes with supplier or airline conditions about how fares may be displayed and discounted, so a code that works fine on hotels may not be allowed on every flight result. Taxes and supplier fees usually sit outside the discount as well.

Before you run a campaign, create one test code, make a booking with it and check that the final amount and your margin come out the way you expected, and ask your account contact which products discount codes can cover on your plan.