Airbus A321neo

What the figures say

Airbus A321neo ranks 1 of 25 types for seat-miles per gallon in 2025, at 105.0. The Boeing 737-800, the most common type in the table, flew 79.1, so a gallon on the Airbus A321neo carried a seat 33% further. Over 1,000 miles, one seat on this type accounts for about 93 kg of CO2 from the fuel burned.

The older Airbus A321 flew 77.9 seat-miles per gallon in 2025. The Airbus A321neo is 35% ahead, with 200 seats per flight against 185 (more seats account for part of the gap). Its fuel burn per airborne hour is 889 gallons against 1,076.

US airlines burned 1,040 million gallons on the Airbus A321neo in 2025, 5.6% of the fuel burned on all scheduled passenger flying, over 1,169 thousand airborne hours and 356 thousand departures. The average flight spent 3.3 hours in the air and burned 2,919 gallons.

Since 2021, when it was first flown in volume, the type's figure has fallen from 111.2 to 105.0 seat-miles per gallon (5.5%). The average flight got shorter, from 3.9 to 3.3 hours in the air, which tends to raise fuel burn per seat-mile, because take-off and climb take a larger share of the fuel on a short flight. Fuel per airborne hour rose 7.1%, from 830 to 889 gallons.

Airlines get different results from the same aircraft. Frontier Airlines flew 119.7 seat-miles per gallon on it and American Airlines 98.7, a gap of 21%. The seat count explains most of it: Frontier Airlines put 240 seats on each flight against 195 at American Airlines. Flight length differs too, at 2.3 hours in the air per flight for Frontier Airlines and 3.5 for American Airlines. Longer flights normally burn less fuel per seat-mile, so the longer flights at American 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 an Airbus A321neo, from the fuel burned, at the 2025 average.

• 46 kgover 500 miles
• 93 kgover 1,000 miles
• 186 kgover 2,000 miles

Who flies it, and how they burn

Airbus A321neo by airline, 2025

Airline	Fuel (million gallons)	Gallons per airborne hour	Seats per flight	Hours per flight	Seat-miles per gallon
American Airlines	292	942	195	3.5	98.7
Delta Air Lines	268	903	194	4.0	101.8
Frontier Airlines	134	872	240	2.3	119.7
United Airlines	108	893	200	2.7	101.6
JetBlue	91	743	164	5.2	106.9
Spirit Airlines	84	867	229	2.3	117.8
Hawaiian Airlines	61	914	189	5.1	101.9

Seats on the Airbus A321neo, airline by airline

The Airbus A321neo has 170 seats at JetBlue and 234 at Frontier Airlines, 38% 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.

Airbus A321neo fleets, 2025

Airline	Aircraft	Average seats	Fewest to most	Average age
JetBlue	39	170.2	138 to 200	3.3
Delta Air Lines	87	190.8	148 to 194	1.6
American Airlines	86	194.3	155 to 196	4.3
United Airlines	51	220.0	220	0.6
Spirit Airlines	21	229.0	229	0.8
Frontier Airlines	67	234.4	186 to 240	1.1

See every airline's fleet on the fleets page.

Similar-sized aircraft

These types carry within about 25 seats of the Airbus A321neo, so they compete for the same routes.

More from Airbus

Browse the Airbus manufacturer hub and its other profiled types:

• Airbus A320neo
• Airbus A330-900
• Airbus A321
• Airbus A330-200
• Airbus A350-900
• Airbus A320-200
• Airbus A220-300
• Airbus A330-300
• Airbus A319

Nearby in fuel efficiency

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

Aircraft references

• Wikipedia: Airbus A321neo

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.