To change your Alaska Airlines flight, visit alaskaair.com and go to “Manage Reservation.” Enter your booking number and last name to access your trip. Select “Change Flight” and choose a new date, time, or destination. Alaska Airlines has eliminated most change fees, but fare differences still apply. Basic Economy (Saver) fares are generally not changeable. You’ll receive a confirmation email with updated details after the change is processed. You can also call Alaska’s customer support or visit an airport kiosk. Same-day flight changes are available for a reduced fee if seats are open.