As Nissan's former Chairman Carlos Ghosn made his way from Osaka, Japan, to Istanbul in a private jet, the price of the flight was likely the least of his concerns.

A source close to the situation told CNBC that a firm listed in Dubai agreed to pay $350,000 to MNG Jet for two flights: one from Dubai in the United Arab Emirates to Osaka; and a second from Osaka to Istanbul. CNBC has reviewed evidence indicating an initial payment or $175,000 or half of the total cost for the two flights.

Evidence provided by the source shows a man named Dr. Ross Allen involved in securing the flight. CNBC could not confirm whether the name was an alias. Officially, Al-Nitaq Al Akhdhar for General Trade Limited, a firm out of Dubai, leased the getaway plane. It's unclear if the company or someone else actually put up the $175,000 for use of the plane.

The private jet, a Bombardier Global Express, was the perfect plane to spirit Ghosn out of Japan at 11:09 p.m. on Dec. 29. With a range of 7,077 miles, the plane would easily be able to make the 5,430-mile flight from Osaka to Istanbul.

The plane is also big enough to carry large equipment cases, including one which Ghosn allegedly hid in for the flight from Japan to Turkey, according to The Wall Street Journal. That equipment case is now in the custody of Turkish investigators, who have dusted it for fingerprints.