Which airlines are most fuel efficient?

Frontier Airlines ranks as the most efficient low-cost carrier (and most efficient carrier overall) thanks to operating a younger fleet of predominantly Airbus A320neo family aircraft, with an average aircraft age of just 4.2 years.



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1. Lufthansa: Lufthansa, the German flag carrier, is well-regarded for its comfortable seats and good legroom. They often operate modern aircraft with updated cabin features.

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The top 10 safest airlines 2023
  • Qantas.
  • Air New Zealand.
  • Etihad Airways.
  • Qatar Airways.
  • Singapore Airlines.
  • TAP Air Portugal.
  • Emirates.
  • Alaska Airlines.


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Here's the ranking of US airlines from MOST complaints in May 2022 to LEAST complaints in May 2022:
  • American Airlines (575 complaints)
  • United Airlines (400 complaints)
  • Frontier Airlines (301 complaints)
  • Delta Air Lines (281 complaints)
  • Spirit Airlines (269 complaints)
  • JetBlue Airways (244 complaints)


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You might avoid these carriers, when possible, to be less likely to encounter unpleasant flight experiences. U.S. travelers report that American Airlines is the most unreliable airline in the world when measured by the total flight problems and reported complaints in 2022.

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The most eco-friendly airlines for environmentally-conscious travellers:
  • Alaska Airlines. ...
  • Delta Air Lines. ...
  • American Airlines. ...
  • Jetblue. ...
  • United Airlines. ...
  • Easyjet. ...
  • Cathay Pacific. ...
  • British Airways.


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Lufthansa. Lufthansa has been independently rated as Europe's first and only 5-Star Airline in 2017, making it one of the 10 best premium airlines in the world. The German airline is the biggest airline within the Lufthansa Group and also a founding member of Star Alliance back in 1997.

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Qatar Airways is set to be announced as the new airline sponsor of Formula 1, nearly doubling the fee paid by previous incumbent Emirates to secure the rights.

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The Boeing 777-200LR holds the world record for the longest non-stop flight without refueling with a flight distance of 11,664 nautical miles (21,601.7 km). The 777-300ER, which is the most popular variant, has a range of 14,490 kilometers (7,825 nautical miles).

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The 777-300 carries 388 passengers with a range up to 5,845 nautical miles (10,820 km). The 777-200ER (Extended Range) carries 314 passengers with a range up to 7,510 nautical miles (13,900 km). To offer airlines additional flexibility in serving nonstop routes, Boeing introduced two new longer range 777 airplanes.

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CBS News reported that, based on the expert opinion of a former Boeing 777 captain, Flight 89 would have likely dumped 15,000–20,000 US gallons (12,000–17,000 imp gal; 57,000–76,000 L) of fuel. Shortly after completing the fuel dump, the aircraft landed safely.

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