A flight from London to Greece will firstly fly East over Kent and the Medway towns in England, then the plane will cross the English Channel and fly over Belgium, passing directly over Brussels. Then the plane will fly over southern Germany, passing close to Frankfurt, then the flight will torn southeast crossing the Alpine region of Austria, then the flight will fly over Slovenia, Croatia, Bosnia, Montenegro and Albania before descending into Greece.
The flight path follows a Northeast direction.
That will depend either on the distance or weather conditions, but I expect that the flight path passes over: Kent (England), Belgium, Germany, Austria, Italy, Croatia, then over the Mediterranean sea towards Greece then towards Saudi Arabia.
in an aeroplane across the sea
none
About 3 hours.
As north as Norway and as south as the Alps.
Glasgow-Greenland-Newfoundland(Labrador).
Southeast over the Alps and the Mediterranean Sea into Egypt
8hr 25min Muscat (MCT) to London Heathrow (LHR) by a nonstop flight operated by Oman Air.
The flight distance from London, United Kingdom to Sardinia, Greece is 1,349 miles / 2,170 km
10 Hours of flight mean you can chose any country which is about 7500 - 8000 km from London. Keep in mind that flight time vary according to the flight path / plan and Aircraft type.
The distance between Corfu, Greece and London Stansted Airport is 2038 kilometers. A direct flight takes on average, 3 hours.