The biggest factors in booking a flight with a specific airline – along with price and how likely it is to lose your luggage – are leg room and general seating comfort.
If you are flying for more than five hours, you definitely want more space to move around as deep vein thrombosis can be a huge concern. Space, however, can be hard to find as carriers try to squeeze in more rows to make higher profits for each flight.
Leg room is measured by “pitch,” the distance from a seat to the one behind it. Seat width and seat pitch vary by airplane model and route.