whoa! a charter flight is one that has been "chartered", ie. "rented" by a company - usually a tour operator - who then crams as many people onto it as possible. The operator rents the plane, crew, fuel, ground clearance, etc. and pays for it irrespective of whether there's 10 or 110 people on board. Hence the cost per person drops when they cram 380 revellers onboard. Likewise at the '99 solar eclipse, a company chartered a BA concorde to chase the eclipse, and charging people to go on the flight. You cannot choose to go on a chartered flight per se... If the company you book a trip through has chartered a plane because they'll make more money than the profit they'll get booking however many scheduled seats they need, then they'll charter a plane. Me... I get money off my holidays and then book my own scheduled flight because all the airlines that charter planes to holiday tour operators, eg. Monarch, are nothing short of abysmal.