Priority Pass has provided passengers with access to more than 900 partner-operated airport lounges worldwide.
The company added 51 lounges to its programme between January and April.
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Priority Pass Global Marketing director Stephen Simpson said: "Over the last year we have witnessed faster expansion in the number of lounges available to members than ever before.
"Today’s major milestone, reaching 900+ lounges, is testament to the hard work of the team, who have remained focused on ensuring all Priority Pass members have access to the best and largest network of lounges across the globe."
"In addition to expanding the size and quality of the network, we remain dedicated to aligning the Priority Pass brand to reflect the changing needs and expectations of the frequent flyer."
More than 80 lounges from the Asia Pacific region have been added to the Priority Pass network since January 2015.
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By GlobalDataThis includes 60 lounges in China, and others in Indonesia, Taiwan, Cambodia, Thailand and New Zealand.
Other major markets for Priority Pass are in Europe, the Middle East and Africa (EMEA), which have added 22 lounges to the programme.
Since April 2015, more than 30 new lounges have been added in Russia, along with additions from France and Ukraine.
Priority Pass has also added ten lounges from US airports, including San Francisco, New York and Orlando.
