Each traveler can bring on board one carry-on bag plus one personal item free of charge. To ensure a smooth boarding experience, it's important to make sure that these items will fit into the overhead bin or under the seat in front of you.

Carry-on bag

The maximum dimensions for a carry-on bag are 9 inches x 14 inches x 22 inches (22 cm x 35 cm x 56 cm), including handles and wheels.

Personal item

The maximum dimensions for your personal item, such as a shoulder bag, backpack, laptop bag or other small item, are 9 inches x 10 inches x 17 inches (22 cm x 25 cm x 43 cm).

baggage-sizer 

To determine if a bag will fit onboard, bag sizers will be available in the airport lobby. Once at the gate, any item in excess of the carry-on baggage size or allowance requirements will be checked to your final destination and may be subject to applicable service charges.

Carry-on items that are acceptable to transport in the cabin but are fragile or bulky will be considered cabin-seat baggage. Customers can purchase a ticket for a cabin-seat baggage item so that it may be carried on board and transported in a seat.

The following items are allowed and do not count toward your one bag and one personal item limit:

  • Jacket or umbrella
  • Reading material
  • Pet carrier (service charges apply)
  • FAA-approved child restraint seat
  • Diaper bag
  • Food or merchandise purchased in the airport
  • Assistive devices (collapsible wheelchair, cane, one set of crutches, medical devices needed to administer prescription medications, portable oxygen concentrator, etc.)

Musical instruments as carry-on

As part of the allowance of one carry-on plus one personal item, a passenger may carry a violin, guitar or other small musical instrument onboard the aircraft as carry-on baggage if: 

  • The instrument can be stowed in the overhead bin or under the seat in front of the passenger; and
  • There is space for stowage at the time when the passenger boards the aircraft

 

Musical instruments transported onboard United and United Express aircraft must be in hard-shell cases.

Liquids, gels and aerosols

The Transportation Security Administration (TSA) allows each traveler to carry on liquids, gels and aerosols in containers of 3.4 ounces (100 mL) or less, inside a single quart-size (liter-size) clear, sealable bag.​​