United Airlines Checked Baggage Allowance All checked bags must adhere to a max weight of 50 pounds (23 kg) for all economy and premium economy fares and 70 pounds (32 kg) for business, first, and Polaris and must adhere to max linear dimensions of 62 inches (158 cm).

On United Airlines in 2026, Economy Plus is considered a seating upgrade, not a separate fare class, meaning the luggage allowance is generally the same as a standard Economy ticket. For domestic U.S. flights, you are allowed one personal item (like a backpack) and one full-sized carry-on bag for free. However, checked bags usually cost $35–$40 for the first bag unless you have Premier status or a United co-branded credit card. For international long-haul flights in 2026, Economy Plus passengers typically get one checked bag (up to 23kg/50lbs) included for free. It is important to note that if you booked a "Basic Economy" ticket and then paid to upgrade to an Economy Plus seat, you are still bound by the Basic Economy baggage restrictions (which often prohibit a full-sized carry-on). Always check your digital 2026 receipt, as baggage rules can vary slightly if your flight is operated by a partner like Lufthansa or ANA.