Boeing 767-300ER

The 767-300ER is the best-selling version of the 767. Delta, the largest US passenger operator of the 767, and United fly it on long routes. Freighter versions are left out of these figures.

A twin-engine airliner climbing under stormy purple clouds — Illustrative photo. It doesn't identify an aircraft type or airline. Photo: satit_srihin, DepositPhotos Standard licence.

1,684gallons per airborne hour
58.0seat-miles per gallon
196seats per flight on average
10,335gallons burned per flight

What the figures say

Boeing 767-300ER ranks 24 of 25 types for seat-miles per gallon in 2025, at 58.0. The Boeing 737-800, the most common type in the table, flew 79.1, so a gallon on the Boeing 767-300ER carried a seat 27% less far. Over 1,000 miles, one seat on this type accounts for about 168 kg of CO2 from the fuel burned.

US airlines burned 539 million gallons on the Boeing 767-300ER in 2025, 2.9% of the fuel burned on all scheduled passenger flying, over 320 thousand airborne hours and 52 thousand departures. The average flight spent 6.1 hours in the air and burned 10,335 gallons.

Since 2000, when it was first flown in volume, the type's figure has fallen from 63.1 to 58.0 seat-miles per gallon (8.0%). Its best year was 2001, at 66.4. The average flight got longer, from 4.4 to 6.1 hours in the air, which tends to lower fuel burn per seat-mile, because take-off and climb take a larger share of the fuel on a short flight.

Airlines get different results from the same aircraft. Delta Air Lines flew 63.8 seat-miles per gallon on it and United Airlines 53.3, a gap of 20%. The seat count explains most of it: Delta Air Lines put 214 seats on each flight against 180 at United Airlines. Flight length differs too, at 5.8 hours in the air per flight for Delta Air Lines and 7.7 for United Airlines. Longer flights normally burn less fuel per seat-mile, so the longer flights at United Airlines should have helped it, not hurt it. What's left comes from taxi and holding time, weight, engines, how each airline operates and how it allocates fuel to types when it reports, and the filings can't separate those.

What one seat costs the climate

CO2 for one seat on a Boeing 767-300ER, from the fuel burned, at the 2025 average.

84 kgover 500 miles
168 kgover 1,000 miles
336 kgover 2,000 miles

Boeing 767-300ER seat-miles per gallon across all US airlines flying it, by year, from the first year it was flown in volume.

Who flies it, and how they burn

Boeing 767-300ER by airline, 2025

Airline	Fuel (million gallons)	Gallons per airborne hour	Seats per flight	Hours per flight	Seat-miles per gallon
Delta Air Lines	259	1,673	214	5.8	63.8
United Airlines	231	1,698	180	7.7	53.3

Seats on the Boeing 767-300ER, airline by airline

The Boeing 767-300 has 198 seats at United Airlines and 215 at Delta Air Lines, 9% more on the same model. The seat count is what each airline reports for its own aircraft in 2025, for airlines with 10 or more.

Boeing 767-300ER fleets, 2025

Airline	Aircraft	Average seats	Fewest to most	Average age
United Airlines	37	198.0	198	29.3
Delta Air Lines	37	215.3	211 to 216	28.4

See every airline's fleet on the fleets page.

Similar-sized aircraft

These types carry within about 25 seats of the Boeing 767-300ER, so they compete for the same routes.

Airbus A321neo105.0 seat-miles per gallon, 889 gallons per hour Airbus A320neo100.6 seat-miles per gallon, 780 gallons per hour Boeing 737 MAX 9100.3 seat-miles per gallon, 828 gallons per hour Boeing 737 MAX 896.8 seat-miles per gallon, 800 gallons per hour

How to read this. Fuel is what airlines issued to the type in 2025, as filed with the US Bureau of Transportation Statistics, counted only for the hours spent on scheduled passenger flights and divided by the hours in the air. It includes fuel burned taxiing and holding, so it's higher than the cruise figure in a manual. CO2 is 9.75 kg per gallon of jet fuel.

More from Boeing

Browse the Boeing manufacturer hub and its other profiled types:

Nearby in fuel efficiency

Types on either side of this one in the seat-miles per gallon table, regardless of size:

Embraer 17544.9 seat-miles per gallon Airbus A31958.1 seat-miles per gallon Boeing 777-20062.4 seat-miles per gallon

Source: US Bureau of Transportation Statistics (BTS), Schedule T-2 fuel and airborne hours; US EPA jet-fuel CO2 factor. See the methodology and flight-hour definitions.

Back to all aircraft types, or see how the airlines compare on the airline pages.