According to Google Map data, from Lagos, Nigeria to London, the united kingdom by road if that is possible is approximately 97 h (7,021.8 km) via Trans-Sahara Hwy/N1. By Air
From Murtala International Airport Lagos to London, United Kingdom is approximately 6 hours, 43 minutes.
The calculations are based on a travel flight speed of 500 mph equal to 805 km/h or 434 knots, over 3,110 miles, or 5 005 kilometers, this excludes 30 minutes for take-off and landing.
Also, you have to factor other layoff time that will be incurred if your flight is not a direct flight.
If your flight is a direct one and (one way), the cost for an air ticket (economy) is N177,000 approximately ($492).
If it is a round-trip flight from Lagos to London, the cost is N245,000 approximately ($680).