They can land there at any time, day or night.
It depends on how many flights are landing around the time of your own flight.
The flight will take approximately 12 hours, allowing time for taxi / take-off and landing.
at about 1:00 in the morning.
the road distance from Southampton to heathrow is 67 miles/120 kilometres. the time to drive the distance is approx 1.4 hours increasing during the morning rush hour.
It does not have to do anything with early morning only. actually this time is decided according to other flights-take off & landing times and scheduale as well.there are many of other flights, they departure mostly in mid-night and afternoon.so basically flight's departure time depends on its scheduale but its landing time may vary due to lots of factors such as, air traffic, weather,lack of landing space because of some other flights etc. thats why some time you get late on your landing, as you know very well.
the flight time from Paris to heathrow is 50 min to one houre
flight time from heathrow to Singapore
There is no time difference between the UK and Heathrow as Heathrow is located in London, which is in the UK. Both locations operate on the same standard time zone, Greenwich Mean Time (GMT) or British Summer Time (BST) during daylight saving time.
The flight time from Oslo, Norway to London Heathrow Airport is about 1 hour, 27 minutes.
The average flight time from London Heathrow Airport to Toulouse, France is 1 hour, 6 minutes.
About an hour.