A smaller airline fuel bill is not, by itself, evidence of better fuel efficiency. EIA's February 17, 2017 account put average jet-fuel spot prices at $1.25 per gallon in 2016, compared with $1.53 in 2015 and $2.92 over 2011–14. Those figures describe market prices, not the amount of fuel burned or every carrier's actual purchase cost. [30012][6670]

For physical consumption, EIA's June 13, 2012 analysis offers a deliberately older example. U.S. airlines used about 18 billion gallons in 2005 and 16 billion in 2011. Both greater efficiency and fewer flights contributed to that decline. Expenditure still rose as fuel prices increased, so the direction of the dollar total was the opposite of the direction of gallons consumed. [30012][6670]

The earlier account also described improving efficiency since 2005 using seat-miles per gallon. That measure relates seating capacity and distance to fuel, rather than simply reporting gallons or dollars. It must not be relabeled passenger-miles per gallon, and the cited improvement does not establish how the share of occupied seats changed. Keeping the denominator intact preserves what the comparison actually says. [30012][6670]

The resulting reading method is straightforward: identify the unit before deciding what improved. A price series speaks to cost conditions; gallons describe use; seat-miles per gallon describe a particular efficiency measure. These are two complementary EIA analyses, not independent confirmations of the same result. The 2005–11 example explains the distinction, while remaining historical context rather than a 2016 consumption estimate. [30012][6670]

Source documents

  1. Lower airline fuel costs reduce U.S. airlines’ operating expenses, increase net profitshttps://www.eia.gov/todayinenergy/detail.php?id=30012
  2. High airline jet fuel costs prompt cost-saving measureshttps://www.eia.gov/todayinenergy/detail.php?id=6670