Sometimes.. Changes in plan is risky for flight cancellation. it may cause you in loss. Most of the time when any client makes a few adjustments in his flight price ticket, he wishes to pay a few amounts which is not possible all time. As per the policy, you're required to pay for making a few adjustments, nevertheless, if you are going to change your flight you must, first of all, check your elegance of reserving and, then choose your form of the price ticket that indicates the prices at the same time. If you want to know more about Tap Air Portugal Cancellation Policy