A private jet travel broker is accused of stealing more than $4 million from his ritzy clients — including a Big Apple TV journalist and major international consulting firm.

William Boos, 55, appeared in Manhattan Supreme Court on Wednesday and pleaded not guilty to the slew of charges against him, including grand larceny and criminal possession of a forged instrument.

“Between 2017 and 2020, the defendant stole over $4.5 million by charging some of his clients with flights they did not request or take — or charging other clients with flights that they took and paid for,” said Assistant District Attorney Natallia Krauchuk.

The Florida native allegedly charged $3 million over the three-year period to the American Express credit card of an unidentified international consulting firm — for flights the firm’s employees had never requested or taken.

The broker also stiffed an unnamed Manhattan art gallery out of $1 million when he used the gallery’s American Express account to book unauthorized charter flights, prosecutors charged.

When the gallery noticed the travel charges, Boos allegedly said it must have been an error and promised to refund the money.

However, the broker then sent 24 forged documents purporting to show the refunds into the account, the DA claimed.

A Big Apple-based TV reporter was also allegedly scammed out of $63,000 in December 2020 when Boos sent two forged contracts purportedly signed by the journalist to the private charter plane company he brokered for the flight, according to court documents.

Boos posted bail in the amount of $500,000 and is due back in court on March 2.

“William Boos thought he could fly above the law, allegedly using his clients’ American Express cards without authorization to siphon off millions for himself. But now, thanks to the hard work of my office, he’s landed in hot water,” said Manhattan District Attorney Alvin Bragg.

“New Yorkers deserve to book air travel without worrying about falling victim to theft and criminal fraud,” Bragg added.