Alaska Airlines' refund policy depends on the type of ticket you purchased and when you cancel. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK) You can get a full refund if you cancel within 24 hours of booking, but the rules change for different fare types after that initial period. 

Full cash refund eligibility

• Within 24 hours of booking: All tickets are eligible for a full refund if you cancel within 24 hours of the initial purchase, provided the travel is booked more than 24 hours in advance.
• Refundable tickets: You can get a full refund on these tickets at any time before departure. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK) The refund will be returned to your original form of payment.
• Significant schedule change or cancellation by Alaska: If Alaska Airlines cancels your flight or makes a schedule change of one hour or more, you are eligible for a full refund, even on a nonrefundable ticket. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK)