Airbus A319

What the figures say

Airbus A319 ranks 23 of 25 types for seat-miles per gallon in 2025, at 58.1. The Boeing 737-800, the most common type in the table, flew 79.1, so a gallon on the Airbus A319 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 662 million gallons on the Airbus A319 in 2025, 3.5% of the fuel burned on all scheduled passenger flying, over 695 thousand airborne hours and 402 thousand departures. The average flight spent 1.7 hours in the air and burned 1,644 gallons.

Since 2000, when it was first flown in volume, the type's figure has fallen from 61.8 to 58.1 seat-miles per gallon (6.1%). Its best year was 2018, at 67.6. The average flight got shorter, from 2.3 to 1.7 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 7.3%, from 887 to 952 gallons.

Airlines get different results from the same aircraft. Allegiant Air flew 73.5 seat-miles per gallon on it and American Airlines 54.1, a gap of 36%. The seat count explains most of it: Allegiant Air put 156 seats on each flight against 128 at American Airlines. Flight length differs too, at 1.9 hours in the air per flight for Allegiant Air and 1.6 for American Airlines, and longer flights burn less fuel per seat-mile, which helps Allegiant Air. 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 A319, from the fuel burned, at the 2025 average.

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

Who flies it, and how they burn

Airbus A319 by airline, 2025

Airline	Fuel (million gallons)	Gallons per airborne hour	Seats per flight	Hours per flight	Seat-miles per gallon
American Airlines	307	982	128	1.6	54.1
United Airlines	166	915	126	1.8	58.2
Delta Air Lines	133	947	132	1.9	60.4
Allegiant Air	57	921	156	1.9	73.5

Seats on the Airbus A319, airline by airline

The Airbus A319 has 120 seats at United Airlines and 156 at Allegiant Air, 30% 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 A319 fleets, 2025

Airline	Aircraft	Average seats	Fewest to most	Average age
United Airlines	76	120.0	120	23.5
American Airlines	132	128.0	128	21.3
Delta Air Lines	57	132.0	132	23.4
Allegiant Air	28	156.0	156	19.8

See every airline's fleet on the fleets page.

Similar-sized aircraft

These types carry within about 25 seats of the Airbus A319, so they compete for the same routes.

More from Airbus

Browse the Airbus manufacturer hub and its other profiled types:

• Airbus A321neo
• Airbus A320neo
• Airbus A330-900
• Airbus A321
• Airbus A330-200
• Airbus A350-900
• Airbus A320-200
• Airbus A220-300
• Airbus A330-300

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 A319

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.