The economy class route that has witnessed the biggest fall in flight prices in real terms since 1985 is the London to Tokyo Narita Airport journey.
Such is the finding of Kelkoo, which revealed that the typical airfare has declined from £1,049 to £422 – a retreat of 60 per cent.
Heathrow Airport offers a number of airlines that fly to Tokyo Narita Airport, including Aeroflot – which departs from Terminal 4 – and British Airways, which leaves from Terminal 5.
All Nippon Airways, Virgin Atlantic Airways and Japan Airlines all fly out of Terminal 3.
Since the mid-eighties, economy flights to Japan, Russia and Nigeria have experienced an average yearly drop of four per cent in price, the survey showed.
Commenting on the findings, managing director at Kelkoo Travel Chris Nixon said: "Cost savings, notably for economy travel, have been passed on to the passenger with an average economy ticket now 35 per cent cheaper than in 1985."
He added that people should also take advantage of the fact that there are a plethora of airlines competing with one another to offer the most attractive flight price.