A federal judge on Tuesday refused to let Long Island ex-teacher Jason Nissen, accused in a $70 million Ponzi scheme that defrauded investors in his ticket brokerage business, go to Las Vegas while he’s on bail to broker tickets for the Floyd Mayweather vs. Conor McGregor fight.

Nissen, 44, of Roslyn, is restricted to New York, New Jersey and Pennsylvania under a $250,000 bail bond signed by his parents. He said he needed to cut deals between brokers in Las Vegas for tickets to the big Aug. 26 fight to support his family, and promised he wouldn’t handle money.

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But Manhattan U.S. District Judge Paul Engelmayer nixed the request after prosecutors said Vegas would present opportunities for Nissen to flee and invited new frauds because his money-making scheme was the “same genus of conduct that led to multiple victims being defrauded.”

Nissen previously taught in New York City schools. His lawyer has said he is trying to work out a plea. His next court appearance was set for Oct. 26.