Alaska Airlines is shuffling the deck with its popular Mileage Plan loyalty scheme. In a pitch to customers of both Alaska and Hawaiian Airlines, the carrier is rolling out its new Atmos Rewards plan. What does the new loyalty scheme mean for you?

Alaska Airlines and Hawaiian Airlines today introduced Atmos Rewards — a combined loyalty program that is one of the major consumer-­facing milestones since Alaska Air Group’s $1.9 billion acquisition on Sept.