Green Airlines

Rankings / Airlines

Every airline

13 airlines flew scheduled passenger service in 2025 with enough volume to rank. Each page has the full history back to its first year in the data.

Flying in 2025

A passenger jet seen from below on approach, landing gear down, contrails above
A
Frontier Airlines

83.0 passenger-miles per gallon

Average trip: 938 miles per passenger.

In the data since 2000.
A passenger jet flying over a small tropical island
A
Hawaiian Airlines

79.9 passenger-miles per gallon

Average trip: 1,666 miles per passenger.

In the data since 2000.
A passenger jet at a gate in a snowstorm
A
Sun Country Airlines

77.6 passenger-miles per gallon

Average trip: 1,276 miles per passenger.

In the data since 2000.
A passenger jet climbing away from a blurred runway
A
Spirit Airlines

76.5 passenger-miles per gallon

Average trip: 978 miles per passenger.

In the data since 2000.
A passenger jet crossing snow-covered mountains with a contrail behind it
A
Alaska Airlines

71.6 passenger-miles per gallonAllocation range: 67.23 to 71.61 passenger-miles per gallon.

Order uncertain with Allegiant Air: the results overlap. Treat these results as tied.

Average trip: 1,293 miles per passenger.

Includes estimated regional partner allocation. In the data since 2000.
A passenger jet crossing low over a runway under scattered cloud
A
Allegiant Air

69.0 passenger-miles per gallon

Order uncertain with Alaska Airlines: the results overlap. Treat these results as tied.

Average trip: 915 miles per passenger.

In the data since 2005.
A passenger jet climbing over city towers against a stormy orange sky
B
JetBlue

64.8 passenger-miles per gallon

Average trip: 1,357 miles per passenger.

In the data since 2000.
A narrow-body passenger jet on approach over farmland
B
Southwest Airlines

64.3 passenger-miles per gallon

Average trip: 821 miles per passenger.

In the data since 2000.
A passenger jet on approach over the sea at dusk
C
Avelo Airlines

62.0 passenger-miles per gallon

Average trip: 841 miles per passenger.

In the data since 2023.
A passenger jet climbing through an orange sky of streaked cloud
C
Breeze Airways

60.5 passenger-miles per gallon

Average trip: 883 miles per passenger.

In the data since 2022.
A wide-body passenger jet on an apron at sunset
C
United Airlines

58.2 passenger-miles per gallonAllocation range: 58.24 to 58.34 passenger-miles per gallon.

Average trip: 1,480 miles per passenger.

Includes estimated regional partner allocation. In the data since 2000.
A passenger jet flying above clouds lit by the setting sun
D
Delta Air Lines

58.0 passenger-miles per gallonAllocation range: 57.65 to 57.96 passenger-miles per gallon.

Average trip: 1,219 miles per passenger.

Includes estimated regional partner allocation. In the data since 2000.
The nose of a passenger jet docked at a jet bridge in low sun
D
American Airlines

55.9 passenger-miles per gallonAllocation range: 55.89 to 56.62 passenger-miles per gallon.

Average trip: 1,118 miles per passenger.

Includes estimated regional partner allocation. In the data since 2000.

No longer in the data

These airlines stopped flying, merged into another filer or fell below the size cutoff. Their history stays here.

A passenger jet on night approach above the runway lights
2000 to 2011
AirTran Airways Last figure 52.4 passenger-miles per gallon.
A sunset over the sea with a contrail across the sky
2000 to 2007
Aloha Airlines Last figure 41.5 passenger-miles per gallon.
A jet airliner in warm silhouette against a pale sky
2000 to 2007
America West Airlines Last figure 54.6 passenger-miles per gallon.
A passenger jet climbing past a bank of cloud
2000 to 2007
ATA Airlines Last figure 43.4 passenger-miles per gallon.
A passenger jet climbing with the sun flaring behind its wing
2000 to 2011
Continental Airlines Last figure 54.5 passenger-miles per gallon.
A passenger jet rolling out on a runway
2000 to 2001
Midway Airlines Last figure 42.3 passenger-miles per gallon.
A passenger jet on final approach seen from behind
2000 to 2009
Midwest Airline Last figure 47.0 passenger-miles per gallon.
A twin-engine passenger jet flying head on through a bank of clouds
2000 to 2002
National Airlines Last figure 46.6 passenger-miles per gallon.
Close view of a jet engine fan in falling snow
2000 to 2009
Northwest Airlines Last figure 45.6 passenger-miles per gallon.
A four-engine airliner landing at sunset over approach lights
2000 to 2001
Trans World Airlines Last figure 38.3 passenger-miles per gallon.
A passenger jet silhouetted against a glowing sunset over the sea
2000 to 2015
US Airways Last figure 57.1 passenger-miles per gallon.
A passenger jet climbing away over city lights at dusk
2004 to 2010
USA 3000 Airlines Last figure 55.0 passenger-miles per gallon.
A passenger jet in silhouette taking off into an orange sunset
2000 to 2002
Vanguard Airlines Last figure 33.6 passenger-miles per gallon.
A passenger jet flying away over pale mountains in warm light
2008 to 2017
Virgin America Last figure 62.7 passenger-miles per gallon.