Rothstein, then living in Chicago, bought his AAirpass for $250,000, plus a companion ticket for $150,000 more.

“I could go someplace and I wouldn’t even have to think about it,” he said. “Just make the reservation and go.”

He traveled 18 times in July 2004 alone, jetting to Nova Scotia, Maine, London, Los Angeles and Denver.

Once a business meeting in Miami was postponed for a day, so he took a junket to Caracas.

He booked flights under fake names such as “Bag Rothstein” if he didn’t know who his companion would be — a practice that the airline later used to accuse him of fraud.

Because of the AAirpass, his daughter went to boarding school in Switzerland. He took his son to dozens of nationwide sporting events including the Yankees-Mets Subway Series.

Some days he flew to Providence, RI, home of his alma mater, Brown University, just for a baloney-and-Swiss-cheese melt from a place called Geoff’s.

“A very fun Saturday would be to wake up early and fly to Detroit, rent a car and go to Ontario, have lunch and spend $50 or $100 buying Canadian things,” Rothstein said.

He’d be home in time for dinner with his wife and friends.

“But I wouldn’t say, ‘Oh, I went to Canada today.’ That would sound obnoxious.”