- Global Airline Partnerships: Southwest is formalizing partnerships with international carriers to expand its network and connect Customers with more global destinations to generate additional demand for travel across the Southwest network. Icelandair will become Southwest's initial partner with an expected launch in 2025 through Baltimore-Washington International Airport, which will serve as its first U.S. gateway for the carriers. The Icelandair partnership will expand gateways throughout 2025, and Southwest intends to add at least one additional partner carrier next year.
Not a great surprise that they are going to try to turn (again) their long standing ‘relationship’ with Icelandair into something a bit more formal with the usual ‘alliance’ aspects.
I have no idea who else they might have on their radar to be an ‘international’ partner.