How long is flight from Manchester to Korea?
The flight would be 12 hours long.
There are no direct flights from Manchester to Lagos Nigeria. You will need to take a flight from Manchester to London Heathrow which takes about 30 minutes, and then an interconnecting flight from Heathrow to Lagos, which is about 7 hours long. That combined with the Manchester to London flight will take about 7 hours and 30 minutes in total.