A typical commercial airplane burns between 850 and 1,600 gallons of jet fuel per hour, depending on its size and the length of the flight. A single cross-country trip from New York to Los Angeles in a narrow-body jet uses roughly 4,000 to 5,000 gallons, while a long-haul flight from the U.S. to Asia on a wide-body aircraft can burn through 30,000 gallons or more.
Fuel Burn by Aircraft Size
The biggest factor in fuel consumption is the size of the airplane. Commercial jets fall into two broad categories: narrow-body planes used for shorter domestic routes, and wide-body planes designed for long international flights. The difference in fuel burn between them is dramatic.
A Boeing 737-800, one of the most common narrow-body jets in the world, burns about 850 gallons of jet fuel per hour. On a typical two-hour domestic flight, that works out to roughly 1,700 gallons. The newer 737 MAX series improves on that figure by about 20%, bringing hourly consumption closer to 680 gallons.
Wide-body jets used for long-haul routes consume far more. The Airbus A350-900, a popular twin-aisle aircraft, burns between 1,530 and 1,640 gallons per hour (5.8 to 6.2 metric tons). Its larger sibling, the A350-1000, pushes closer to 1,820 gallons per hour. The Airbus A380, the world’s largest passenger aircraft, carries a maximum of 320,000 liters (roughly 84,500 gallons) of fuel in its tanks, which gives some sense of how much a superjumbo needs to cross an ocean.
What Those Numbers Mean Per Passenger
Raw fuel burn sounds enormous, but airplanes carry a lot of people. When you divide total fuel consumption by the number of passengers, commercial aviation is more efficient than it first appears. Data from the U.S. Department of Energy puts average airline fuel economy at about 141 passenger miles per gallon of gasoline equivalent. That’s roughly comparable to a car carrying four people on the highway, and considerably better than driving alone.
This per-passenger figure improves when flights are fuller. A half-empty 737 is significantly less efficient per person than a packed one, which is why airlines work so hard to fill every seat. Load factor, the percentage of available seats actually sold, has climbed above 85% for most major U.S. carriers in recent years, pushing per-passenger efficiency to its best levels ever.
Why the Same Plane Burns Different Amounts
Even for the same aircraft type, fuel burn varies significantly from one flight to the next. Several factors push consumption up or down.
Weight is the most direct lever. FAA research shows the relationship is remarkably linear: for a Boeing 737 flying a 500-mile route, every additional 100 pounds of weight adds about 0.3 gallons of fuel per flight hour. That sounds small, but it scales quickly across an entire fleet operating thousands of flights a year. A 100-pound weight penalty on a single 737 costs roughly $1,900 in extra fuel annually. For a wide-body like the 747-400 on longer routes, the penalty is steeper: about 0.5 gallons per flight hour for every extra pound.
Distance matters in a counterintuitive way. Takeoff and climb are the most fuel-intensive phases of any flight, burning two to three times more fuel per minute than cruising at altitude. Short flights spend a larger share of their total time in these high-burn phases, making them less efficient per mile than longer ones. A 300-mile hop burns more fuel per mile than a 1,500-mile flight in the same airplane.
Weather and routing also play a role. Headwinds can increase fuel burn by 10% or more on westbound transcontinental flights. Air traffic delays, holding patterns, and longer-than-ideal routing all add up. Even temperature matters: hotter air is less dense, which reduces engine efficiency slightly and requires longer takeoff rolls.
How Newer Jets Save Fuel
Aircraft manufacturers have made substantial progress in fuel efficiency over the past several decades. Each new generation of commercial jet typically burns 15 to 20% less fuel than the model it replaces. Boeing advertises a 20% reduction in fuel use for the 737 MAX compared to earlier 737 models, achieved through more efficient engines, redesigned wing tips, and lighter materials.
Similar improvements show up across the industry. The Airbus A350 uses composite materials for more than half its airframe, cutting weight significantly compared to older aluminum-heavy designs. Modern high-bypass turbofan engines extract more thrust from each gallon of fuel by moving a larger volume of air through the engine at lower speeds, which is both quieter and more efficient.
Airlines also squeeze out savings through operational tweaks: continuous descent approaches instead of step-down patterns, single-engine taxiing on the ground, and software that calculates the optimal amount of fuel to carry (since extra fuel adds weight, which burns more fuel).
Carbon Emissions From Jet Fuel
Every gallon of jet fuel burned produces about 21.5 pounds of carbon dioxide. That means a 737-800 flying a five-hour transcontinental route generates roughly 91,000 pounds of CO2, or about 41 metric tons. Spread across 180 passengers, that’s around 500 pounds of CO2 per person for a single one-way flight.
For context, the average American generates about 36,000 pounds of CO2 per year from all activities combined. A single round-trip cross-country flight adds roughly 1,000 pounds to that total, about 3% of your annual footprint. A round-trip to Europe on a wide-body jet roughly doubles that figure. Aviation accounts for about 2 to 3% of global CO2 emissions, a share that has been growing as air travel expands faster than efficiency improvements can offset it.