The plane you fly on has quietly become one of the most efficient machines you will ever ride in. A modern long-haul jet, packed with passengers, can move a person a great distance on a surprisingly small amount of fuel per seat. Newer models like the Airbus A320neo family, the Boeing 787 Dreamliner, and the Airbus A350 burn much less fuel than the planes they replaced. Here is what changed, and why it matters even if you never think about jet fuel.
When people talk about how thirsty a plane is, the number that matters is not how much fuel it burns per hour. It is how much fuel it burns to carry one passenger a set distance. A big jet burns a lot of fuel, but it also carries a lot of people, so you divide the fuel across all those seats. A modern airliner on a long flight can work out to somewhere in the range of a few liters of fuel per 100 kilometers per passenger. That is roughly in the same ballpark as a fuel-efficient car carrying a single person, except the plane is going far faster and does not need roads. Fill more of the seats and the number per passenger drops even further.
Newer jets got more efficient in three main ways, and most modern designs use all three at once.
On short and medium routes, the standouts are the Airbus A320neo family and the Boeing 737 MAX. Both are updated versions of long-running workhorses, fitted with new engines and refined wings, and both deliver a solid double-digit percentage improvement in fuel per seat over the models they replaced.
On long-haul routes, the Boeing 787 Dreamliner and the Airbus A350 lead the pack. Their makers have pointed to fuel and operating-cost savings on the order of 20 to 25 percent versus the older generation of aluminum widebodies. Those savings are also what let airlines open thin, ultra-long routes that simply did not make financial sense before.
Fuel is one of the largest costs an airline has, so a more efficient fleet is cheaper to run, and that pressure helps keep fares in check over time. Burning less fuel also means fewer emissions for every passenger carried, which is the single biggest lever aviation has for shrinking its climate footprint today. And better efficiency usually comes bundled with a quieter, more comfortable cabin, since the same composite airframes tend to run at a more pleasant cabin pressure and humidity.
Efficiency shapes your trip in a subtler way too. A more efficient plane can fly farther without stopping, which is why so many new nonstop routes keep appearing between cities that used to require a connection.
Next time you board, it is worth remembering that the aircraft under you is likely far more efficient than anything flying a couple of decades ago. If you want to see how long your own trip will take on today's jets, our the FlightBeat calculator gives you a gate-to-gate estimate for any two airports.
New tools, fresh route data, and the odd travel tip. No spam, and you can unsubscribe anytime.