Priority Pass members will no longer have access to United Club lounges from next month.
The US airline is ending its partnership with the airport lounge access provider.
From May 15, Priority Pass cardholders will be unable to enter any of United Club's 49 facilities worldwide.
Priority Pass has emailed the following statement to its members: "We regret to inform you that United Club lounges, one of our partners, has unfortunately chosen to no longer participate in the Priority Pass lounge access program, effective May 15.
"While this does mean that our members will no longer have access to United Club's 49 lounges (41 located in 26 airports in the US and eight at international locations), we are pleased to advise that alternative lounges are immediately available at 17 of the 34 airports affected (ten in the US and seven at international airports) meaning minimal disruption for Priority Pass members travelling through these locations."
United said in a statement: "To ensure our valued United Club members can enjoy our clubs with more space and comfort, we'll no longer accept Priority Pass beginning May 2015."