Infratil says it is still trying to sell two airports in Britain, despite passenger numbers improving.
The company has been trying to sell Glasgow Prestwick and Kent International airports, which last year lost $10 million, for more than a year.
Latest figures show passenger numbers at Glasgow increased 14% in May with more than 118,000 passengers passing through, and the budget airline Ryanair plans to add more flights in July.
Infratil chief executive Tim Brown says the airports have attracted lots of potential suitors but have not yet found a buyer. Talks with several interested parties are ongoing.
Infratil shares rose 3.5 cents yesterday to close at $2.23.