“As a list of hotels that we use for our business, being honest, Turnberry was always last on the list, based on price,” Jules Matteoni, a manager at Glasgow Prestwick, wrote in June 2015 to executives at Trump Turnberry. “Yesterday’s proposal places Turnberry in a favorable position and gives us food for thought in our placement of crews moving forward.”

Mr. Trump visited Glasgow Prestwick in 2014 and promised to help increase traffic at the airport, although at the time he was largely referring to plans to drive corporate jets there and attract other commercial traffic perhaps carrying golfers on the way to his resort.

“Forging a new partnership between the airport and the Trump Organization will undoubtedly be mutually beneficial,” Iain Cochrane, then the chief executive of the airport, said at the time of Mr. Trump’s visit.

The documents detailing these conversations were previously obtained by reporters in Scotland, including The Scotsman and The Guardian, who wrote articles about the relationship between the Prestwick airport and the Trump Organization. The documents are still posted on the Scottish government website.

Both the Defense Department and executives at the airport confirmed on Monday that the airport also has a separate arrangement with the United States Air Force. Under that arrangement, the Scottish airport not only refuels American military planes but also helps arrange hotel accommodations for arriving crews, as it does for some civilian and commercial aircraft.

“We provide a full handling service for customers and routinely arrange overnight accommodation for visiting aircrew when requested,” the Prestwick airport said in a statement on Monday. “We use over a dozen local hotels, including Trump Turnberry, which accounts for a small percentage of the total hotel bookings we make.”

It was through the arrangement with the Pentagon that a seven-person United States Air Force crew ended up staying at the Trump Turnberry in March. An Air Force C-17 military transport plane was on its way from Alaska to Kuwait when it stopped at Prestwick overnight to refuel and give the crew a break.