On September 22, Pakistan Air Force (PAF) Gulfstream (aircraft serial J-755) apparently performed ferry flight from Islip Long Island MacArthur Airport, USA, to New York John F. Kennedy International Airport, USA.
It departed from Islip at 9:08 PM and arrived in New York at 9:32 PM. Flight completed in 24 minutes.

Source:
flightradar24.com
On September 23, Pakistan Air Force (PAF) Gulfstream (aircraft serial J-755) performed VIP flight from New York John F. Kennedy International Airport, USA, to London Luton Airport, United Kingdom, with Pakistan Caretaker Prime Minister Anwaar-ul-Haq Kakar onboard.
It departed from New York at 1:16 AM and arrived in London at 12:41 PM. Flight completed in 6 hours & 25 minutes.

Source:
flightradar24.com
Abbas