This document outlines the itinerary and fuel consumption calculations for a transatlantic flight from JFK airport in New York to Heathrow airport in London. It uses a Boeing 747-400 airliner with an initial fuel capacity of 80,000 liters as an example. The document tracks the plane's speed and remaining fuel at takeoff, cruising speed halfway across the Atlantic, and landing. It burns 11.7 liters of fuel per kilometer traveled and arrives at its destination with 14,669 liters of fuel remaining after flying 5,555 kilometers over 6.08 hours.