He almost flew the coop.

Rudy Giuliani crony Igor Fruman was standing on the jet bridge to a Vienna-bound flight at Washington Dulles airport when he was collared for campaign finance violations, prosecutors revealed Friday as a judge denied the businessman’s request he be removed from GPS monitoring.

“What is clear is he was subpoenaed by Congress, and indicated he was not going to comply,” prosecutor Nicholas Roos told Manhattan federal Judge Paul Oetken.

On Oct. 8, a day after getting the subpoena, Fruman bought an $8,000 one-way ticket, and was arrested “on the jet bridge” on Oct. 9, said Roos — who added that the observant Jew had oddly booked a flight for Yom Kippur, one of the holiest days on the Jewish calendar.

Defense attorney Todd Blanche argued his client wasn’t fleeing the country and was instead headed on a business trip.

Fruman and cohort Lev Parnas — who helped Giuliani try to dig up dirt on Joe Biden in Ukraine — are accused of funneling illicit funds to politicians and a pro-Trump super PAC.

They pleaded not guilty last week in Manhattan court, and were released on bond and subject to home detention, restricted travel and electronic GPS monitoring.

Yet Blanche on Thursday filed a request that Fruman be removed from home detention and electronic monitoring because his compliance is already ensured by a $1 million bond.

The attorney said Friday his client, who was not in court, wasn’t a flight risk “just because this case was on the cover of the New York Post.”

Yet Roos said there was no indication the Belarus-born businessman — who operates an import-export business, a luxury brand and a bar abroad — planned to return from his Oct. 9 trip, meaning the GPS monitoring was necessary.

“Without these conditions, he could go to the airport, get on a boat,” the prosecutor said. “He could return to Ukraine, decide to never come back here, and live a very nice life.”

Oetken ultimately denied Fruman’s request, saying: “The one-way ticket to Vienna, it’s impossible to know right now what was the purpose.”

Meanwhile, prosecutors revealed they could also be probing Fruman’s brother, Steven Fruman, who is a co-signer on Igor Fruman’s bond.

“It appears he could be involved in some of the conduct charged in the indictment,” Roos said, saying Steven Fruman had failed to report income from an unnamed LLC currently under investigation by feds as part of the case.

Blanche said Steven Fruman had just a minor interest in the holding company, and that prosecutors were merely “on a fishing expedition.”

A lawyer for Steven Fruman could not be immediately reached.

Igor Fruman and Parnas are due back in court in December.