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

HOUSTON — If you're taking a flight on United Airlines soon, you'll want to get to the airport a little earlier than usual after the airline's new check-in policy went into effect on Tuesday.

NEW YORK (AP) — Stragglers beware: U.S. travelers flying with United Airlines will have to check in to domestic flights a little earlier starting next week. That is, if they’re customers only taking ...