13 Responses

  1. Sice
    Sice at |

    Is the burn difference cargo related?

  2. Noah
    Noah at |

    aside from the huge outliers, there are a lot of factors which could influence the data:
    1) aircraft factors: age of aircraft, engine choice, seating configuration, IFE weight, winglets or engine PIPs
    3) route factors – stage length, altitude, loads, etc.
    As for time, not sure if they are only looking at cruise, flight, or gate to gate.

  3. LongTimeObserver
    LongTimeObserver at |

    May want to factor in stage length as some of the difference is tankering burn.

  4. p
    p at |

    You don’t know if the raw data presented is apples to apples. I highly doubt all the airlines measure (and report) fuel consumption the same.

  5. dan
    dan at |

    You say
    “But the Dreamliners carry about 25% more passengers so the overall efficiency realized there is significant. Similarly, it is easy to see why United wants to use the 737-900ER as much as possible on domestic routes. The former consumes ~850 gallons per hour while the latter is at 1050; switching to the new planes means millions in savings because of that.” I think you mean to compare the 737-900 to the 757-200 but I think you forgot to actually state what the “latter” aircraft you were referring to is.

    1. joseph m
      joseph m at |

      “United’s 787-8 is consuming about the same fuel per hour as the 767-300ERs. But the Dreamliners carry about 25% more passengers so the overall efficiency realized there is significant. ”
      A 787-8 is a Dreamliner. He is comparing a 787 to a 767.

  6. Peter
    Peter at |

    Age of the airplane and the engine will generally contribute 1-2% difference in fuel burn… Long taxi and short taxi will most likely be balance out over time, as I am sure most of those carries flies to very similar destination with their own respective delays at their own hubs… Finally the most significant contribution to this will be stage length of each sector, as it cost fuel to carry fuel, the longer then stage length of the average sector, the more fuel per hour that airline will burn. So from the looks of it, I will say the average stage length of Delta operations is longer than the average at United.

  7. joseph m
    joseph m at |

    I think the capacity of a 787-8 and a 767 isn’t really 25% but the point is well taken.
    http://www.united.com/web/en-US/content/travel/inflight/aircraft/default.aspx

  8. Christian
    Christian at |

    Delta has intentionally gone with older aircraft. They burn more fuel that way, but spend less on aircraft payments. Also, they own a refinery, which subsidizes the fuel cost.