London to Las Vegas: timed to the customs windows
Farnborough to Harry Reid International is 4,531 nautical miles, 5,215 statute miles, about 190 nautical miles short of London to Los Angeles. An ultra-long-range jet flies it non-stop in about ten and a half hours: a Global 6000, G650 or Falcon 8X, or the larger Global 7500 and G700. A heavy jet such as the Legacy 650 stops once for fuel and takes about twelve hours.
Las Vegas is eight hours behind London for most of the year, and the departure time is set by customs. US Customs and Border Protection inspects private arrivals at Harry Reid from 9 am to 1 pm and again from 4 pm. A 7 am weekday departure from Farnborough lands at about 9.30 am local time; a 2 pm departure lands at about 4.30 pm. Leave at 11 am and the jet would arrive in the mid-afternoon gap, when officers are not clearing aircraft.
The calendar matters too. The 2026 Las Vegas Grand Prix runs from 19 to 21 November and CES 2027 from 6 to 9 January, and both weeks fill the private ramps in the valley. For the 2025 race the FAA required parking reservations at every Las Vegas airport from 18 to 25 November, so in those weeks we book the aircraft, the parking and the customs time together, well ahead.
Which London airport to leave from is set out in our guide to the private jet airports in London: FBOs, customs and curfews, side by side.