Delta Air Lines and Alaska Airlines, which had maintained a close partnership for years, have ended their alliance as Delta expands its hub operations in Alaska Air’s home market of Seattle.
Last week both carriers confirmed that their frequent-flyer reciprocity and codeshare agreements will terminate in April. Each airline has posted information on its website explaining how the change will affect customers and loyalty program members.
In a statement, Delta said the move reflects its broader investment and growth plans in the Pacific Northwest. “The decision is a positive milestone for both airlines as Alaska focuses on its merger integration with Virgin America and Delta focuses on creating more customer choice at its Seattle-Tacoma International Airport hub,” the company said.
The partnership had been one of the strongest between U.S. carriers. Through a codesharing arrangement, the two airlines were able to place their two-letter designators on certain flights and sell seats on each other’s networks. Their frequent-flyer tie-up let members earn and redeem miles on flights operated by either airline, simplifying travel for many customers.
That collaboration helped Delta expand its international presence from Seattle, particularly on trans-Pacific routes, while Alaska Airlines’ domestic network fed passengers into Delta’s long-haul services. As Delta developed a larger hub at Seattle-Tacoma International Airport, it launched routes that directly competed with Alaska Airlines, including key corridors between Seattle and California and between Seattle and Alaska.
With the partnership ending, travelers who previously relied on seamless benefits between the two carriers should review the airlines’ notices for changes to mileage accrual, award redemptions and codeshare bookings. Each airline has outlined transition details so customers can plan upcoming travel and manage loyalty accounts accordingly.
The split highlights shifting strategies in the airline industry as carriers adjust alliances and route networks to strengthen their market positions. Alaska Airlines is concentrating on integrating its merger partner and its own network priorities, while Delta is pursuing growth and added frequency out of Seattle to better serve international and domestic connections.
Passengers should check current schedules and booking options directly with the airlines when planning travel originating in or connecting through Seattle, as route alignments and partnership-related services are updated following the end of the agreement.