Priceline set a May 21 closing date for the Kayak buyout after reporting that antitrust reviews have been completed.
Priceline in March said its $1.8 billion acquisition of the travel metasearch leader would be delayed by a review from U.K. antitrust regulators.
Priceline announced the acquisition last November, and initially set a first-quarter deadline.
Last year, 82% of Priceline's gross sales were booked outside of the U.S., likely triggering the review from the U.K. Office of Fair Trading.
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