Alaska Airlines will be merging with Virgin America, and that means an end to the relationship with Delta Airlines on April 30, 2017.

Whether you regularly fly Delta, or Alaska, there is a chance this could affect you.

According to Charles Breer, managing director of alliances, the relationship has ended not just because of the merger, but also because the two companies are close competitors.

“Given our own growth and expansion, Alaska Airlines now can take people virtually anywhere they need to go,” Breer said. “We’ve grown tremendously and with the recent acquisition of Virgin America, we’re now the fifth largest airline in the U.S. We offer more nonstop West Coast departures than any other airline. And, along with our extensive global partner network, you can seamlessly travel to more than 900 destinations worldwide, including on American Airlines, which is the world’s largest airline.”

Alaska will continue to honor partnerships with other SkyTeam Alliance members, including Korean Air, Air France, KLM, and other global partners.

Travelers can continue booking through Alaska Airlines for travel on Delta Air Lines until April 30, 2017 – for travel on or before April 30, 2017.

“If Mileage Plan members have already booked a flight on Delta Air Lines, they will still be able to earn Alaska miles for those flights,” Ryan Butz, managing director of loyalty marketing, said. “For members who are about to book travel, they would need to book and complete travel prior to April 30, 2017 to earn Alaska miles.”

For further details on how this may affect you, visit this website.