Across the North Sea in under two hours
Farnborough to Copenhagen is 545 nautical miles, 627 statute miles. London City and Luton are about 30 nm closer, so from the east and north of London the flight is a few minutes shorter. Every cabin flies it non-stop, so the aircraft is chosen for the party and the luggage, not the range.
Denmark is an hour ahead of London all year. Leave London City at 8 am and you land at Kastrup at about 10.50 local time, in the centre before midday; leave Copenhagen at 6 pm and you are back in London at about 7 pm, London time. A meeting, a lunch at one of the city's restaurants and a flight home fit in one day.
Kastrup, on the island of Amager, is the arrival for almost every jet: the city centre is 8 km away, and the Øresund Bridge to Malmö starts at the airport. Roskilde, the city's business airfield 40 km west, is the alternative for a light or midsize jet heading to west Zealand.
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.