If you get the feeling that planes seem more crowded than they used to be - then you're right.
Shocking statistics from the US Bureau of Transportation Statistics reveal that in 2017 there were a record-breaking 741million domestic-flight passengers in the U.S, up from 647million in 2005.
However, in that time the number of flights being operated has decreased 18.5 per cent and the average number of passengers on a US domestic flight since 2007 has risen from 69 to 91.
The decline in the number of flights is being blamed on airlines wanting to reduce costs and increase revenue by using larger aircraft and configurations that allow for more seats - a practice in the airline industry known as 'upgauging'.
Seth Kaplan, managing partner for the newsletter Airline Weekly, told Travel Weekly: "The economics on the cost side always favor a larger aircraft.