No, as of 2026, you do not have to fly with the airline associated with a specific lounge to use your Priority Pass membership. One of the primary benefits of the Priority Pass program is that it is "airline agnostic," meaning you can use any lounge within its network regardless of which airline or class of service you are flying. For example, you can fly with a low-cost carrier like Southwest or Ryanair and still access a "The Club" or "Swissport" lounge if they are part of the Priority Pass network in that airport. The only universal requirement for 2026 lounge access is that you must have a valid, same-day boarding pass for any flight departing from the same terminal (or a connecting terminal that is accessible after security). It is worth noting that some lounges may deny entry based on capacity or restrict access during peak times, even if they have the Priority Pass logo, so it's always a good idea to check the Priority Pass app before you arrive.