United Airlines allows its passengers to check one to two bags depending on the fare class and destination of the flight. Here are the details of United Airlines checked baggage policy as of my knowledge cutoff in September 2021:

• For domestic flights and flights to/from Canada, the Caribbean, Mexico, and Central America, passengers can check one standard bag weighing up to 50 lbs (23 kg) and measuring up to 62 linear inches (158 cm) for a fee of $35-40, depending on whether the bag is prepaid or paid at the airport. For the Economy Basic fare class, the first checked bag is not included, and a fee of $35-40 applies.

• For flights to/from Europe, the Middle East, Africa, Asia, Australia, and New Zealand, passengers can check two standard bags weighing up to 50 lbs (23 kg) and measuring up to 62 linear inches (158 cm) each for a fee of $100-120, depending on whether the bags are prepaid or paid at the airport. For the Economy Basic fare class, the first checked bag is not included, and a fee of $60-70 applies.

• United Airlines offers a Premier Baggage service for passengers who want to expedite their checked baggage process. This service allows passengers to check their bags at a dedicated Premier check-in counter and have them delivered to the baggage carousel first upon arrival. The fee for this service varies depending on the route and destination.