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 carry-on bags.
Effective June 3, United's “check-in cutoff” for most U.S. flights will be 45 minutes before departure. That's the same deadline United has for passengers checking luggage at the airport but 15 minutes earlier than the current one for people without bags to check.
