Alaska and Hawaiian Airlines announced a new combined loyalty program. Here's how it will work and what perks members should expect.

The announcement marks another step in the airline’s effort to transform into a global carrier after merging with Hawaiian Airlines last year.

Alaska Airlines and Hawaiian Airlines have launched a joint loyalty program called Atmos Rewards and introduced a new premium co-branded credit card, the Atmos Rewards Summit Visa Infinite, as part of a broader repositioning to serve more global and premium travelers.