Southwest has begun displaying flights on the Kayak leisure site.
The move follows Southwest's joining of Google Flights in May.
The airline had long chosen not to participate in metasearch engines, but it has begun shifting its strategy as it explores new ways to bring in revenue and reverse diminishing profit margins.
Kayak users can now see Southwest fares and flight schedules with Kayak's normal flight results and can compare those results directly with other airlines. The results also display the costs and perks of each flight for Southwest's four divergent fare products.
Kayak first entered in a relationship with Southwest in 2022, but only in its subscription Kayak for Business interface.