These new check-in rules could have a massive impact on your next United flight. Here's everything you need to know.

Passengers who violate these airline rules can be kicked off their flight, arrested, or even added to the no-fly list. SolStock/Getty Images Person walking down aisle of a plane. We've all seen the ...

Spirit Airlines is adding another caveat to flying with the ultra-low-cost carrier — a more stringent dress code. On Jan. 22, Spirit updated its contract of carriage to specify fashion faux pas that ...