Alaska Airlines passengers may gain more direct flights to more international destinations, in what the airline is calling “a major marketing alliance,” to be announced Monday.

The new agreement is with Delta Air Lines, which merged with rival Northwest Airlines after getting antitrust approval Oct. 29. Both Delta and Northwest already had code sharing agreements with Seattle-based Alaska Airlines, which meant flights could be booked for either of the carriers on Alaska.

One benefit for Alaska is that Delta is now moving some aircraft from redundant routes within the U.S., into less-served and more lucrative international routes, said Steve Danishek, president of TMA Inc., a Seattle-based industry consultant and agent.

These will include Valencia, Spain; Monrovia, Liberia; Cape Town, South Africa, and direct flights to Tokyo from Atlanta, New York and Salt Lake, he said. What it means for Alaska is good news on the feed side, because they can now feed to many more destinations,” Danishek said. “It’s just more options for Alaska, for the mileage holders here.”

Danishek said he doesn’t expect a huge investment into marketing the revamped code share This is just jumping on the notoriety of the merger and saying we’re part of that too,” he said of the Monday press conference. “It’s a low-cost way for Alaska Airlines saying there’s more stuff coming for Alaska Airlines passengers.”

When asked, Alaska Airlines spokeswoman Caroline Boren said Monday’s announcement is definitely not a merger and will not include any exchange of stock or interest in either of the companies. Both Alaska Airlines, a unit of Seattle-based Alaska Air Group Inc. (NYSE: ALK), and Delta Air Lines serve Honolulu International Airport.