How to cancel an Alaska flight? Under the Alaska cancelation policy, you can use the official website when you do not wish to continue with a reservation. You can also use the phone number of the airline and share your request on a call. Thus, as per what suits you the best, you can choose either the online or the offline method. Alaska provides a risk-free policy which offers travellers a chance to get airfare without any risk or obligation. In case passengers are cancelling after a risk-free period, they have to pay a cancelation fee