Airlines always try to make more money from each flight. The latest trick? Squeezing 10 people into a single row

It's called "10 abreast seating." Airlines do it by making their Economy seats as small as possible.

The trick used to be used mostly on discount carriers, but even big ones like United and American and doing it now.

To do it, airlines have two sets of 3 seats on each side of the plane, with a big row of 4 seats in the middle, for 10 total.

It only works on wide-body jets, like the Boeing 777. It lets airlines fit more than 380 people on a plane.

Passengers might grumble, but ultimately they're drawn in by the cheaper seats the trick allows.

Swipe up to learn more about 10-abreast seating and other airline changes.