United Carry-on Rules: Size and Basic Economy Exceptions

United's ordinary allowance is one carry-on up to 22×14×9 inches, including wheels and handles, plus one personal item up to 17×10×9 inches. Business or First does not automatically mean two ordinary cabin suitcases. Basic Economy needs a separate eligibility check.

Does Basic Economy include a carry-on?

The default is the personal item only. The official policy lists exceptions for flights to South America, across the Atlantic and across the Pacific. It also lists Premier members, passengers travelling with a Premier member, primary holders of qualifying MileagePlus credit cards and Star Alliance Gold members. The Gateway and MileagePlus Select cards are excluded from the card benefit on that page.

Example: two Basic Economy tickets can have different cabin allowances because the routes or traveller benefits differ. Confirm the applicable exception in the reservation before paying for a checked bag. Our checker uses the default fare rule; it does not establish route or membership eligibility.

Measure in the published units

United also prints rounded centimetre labels. Use one unit consistently; converting rounded limits back and forth can create apparent mismatches. Include handles, wheels and packed bulges.

Which allowance should I check?

Aircraft and fees

United Express cabin space can be limited. CommutAir permits a personal item only; other regional operations may need to check larger bags. Remove spare lithium batteries and power banks if a bag goes into the hold.

Basic Economy bag prices on the source page vary by ticket purchase date and where the bag is paid for. We do not treat a quoted gate price as universal. Check the current charge for your ticket and flight, then compare that with the cost of changing your packing.

The United airline record contains the dimensions used by our tool. This guide explains the exceptions that a dimensions-only result cannot decide.

For the suitcase going into the hold, use our United checked-baggage guide for size, weight and the official itinerary-price lookup. Cabin fit and checked-bag cost are separate checks.