The phrase "short flight" refers to a trip on an airplane that does not last for a long time. It typically involves traveling from one place to another nearby. Full definition
Plus, we use the points mainly for shorter flights on international carriers. (notyouraveragegal.com)
You also get a snack and drink included in your ticket, even on short flights. (dreamtravelonpoints.com)
Since 9/11 there's been a striking decrease in passengers taking short flights of less than 500 km, it reports, partly because it's becoming quicker and more enjoyable to drive. (canadianbusiness.com)