With the exception of tickets for Basic Economy, often known as Saver prices, Alaska has waived its Change fee. The adjustment charge, however, may range from USD 0 to USD 500 in extreme cases.

For prices in Main and First class, Alaska has waived its cancellation charge.
Additionally, there is no price for changing or cancelling a flight for Mileage Plan loyalty club members.
If changes are made to an itinerary after the 24-hour risk-free period, Saver Fare ticket holders must pay a fee of USD 25 to USD 50.
Passengers are required to pay a change fee of between USD 25 and USD 50 for same-day changes.

Also visit : American change fee