If you have a promo code or voucher, you'll be able to apply it easily during the booking process.

Specifically, you'll find an option to enter your code in the payments area. Simply input the code, and any applicable discounts or benefits should be automatically applied to your total fare. If for some reason the code doesn't work, it's usually due to conditions such as expiration date or applicability to certain flights, so make sure to check those details.