How long does it take to get from A to B and back? For my last trip ‘B’ was Dusseldorf; ‘A’; is a constant (Home). Travel time A to Heathrow = 40mins, transfer from car park to terminal = 5mins, flight time = 60mins, transfer from airport to hotel = 15mins. Adding up, it comes to a total of 2 hours door to door; double up because I came home, so 2 + 2 = 4; therefore it takes 4 hrs to get to Dusseldorf and back. So why was the total elapsed time for my journey 13hrs? Or to put it another way, only 30% of the journey time actually involved physically moving towards the destination. Ah, the joy of air travel, and how to fill those hours of waiting.