If you check in after the 45-minute cutoff time, you can still board the flight, but your bag probably won’t make it, and there’s a good chance you’ll have to leave it behind.

WASHINGTON — Starting next month, United Airlines will require all domestic passengers to be checked in for their flights at least 45 minutes before takeoff. The new check-in policy is set to ...

Customers are still able to check in up to 24 hours before the flight, using the United mobile app. The airline's full check-in time policy is available on its website.

Customers are still able to check in up to 24 hours before the flight, using the United mobile app. The airline's full check-in time policy is available on its website.

Customers are still able to check in up to 24 hours before the flight, using the United mobile app. The airline's full check-in time policy is available on its website.

Customers are still able to check in up to 24 hours before the flight, using the United mobile app. The airline's full check-in time policy is available on its website.

WASHINGTON — Starting next month, United Airlines will require all domestic passengers to be checked in for their flights at least 45 minutes before takeoff. The new check-in policy is set to ...

Customers are still able to check in up to 24 hours before the flight, using the United mobile app. The airline's full check-in time policy is available on its website.