To redeem miles with Alaska Airlines Mileage Plan, log into your account on the Alaska Airlines website or app. Navigate to the "Use Miles" section, where you can search for flights and select "Mileage" as your payment option. Alaska partners with several airlines, so you can redeem miles on partner flights too. Select your flight and complete the booking process, where you’ll see the required miles. Besides flights, you can use miles for upgrades, vacation packages, and more. Keep an eye on award sales for reduced-mileage options. Plan in advance, as award seats may be limited during peak times.