Under the seat
Personal Item
43.2×25.4×22.9 cm
17×10×9 in
17×10×9 in. Must fit under seat in front.
Included
Overhead cabin bag
cabin bag
55.9×35.6×22.9 cm
22×14×9 in
No weight limit stated
22×14×9 in. Must fit in overhead bin. No weight limit published.
Measure the full external bag size, including wheels and handles.
Fares & cabin classes
Basic Economy
No overhead cabin bag
Personal Item: 43.2×25.4×22.9 cm
Basic Economy default: personal item only. Exceptions include South America, transatlantic and transpacific flights, Premier/travelling-with-Premier, qualifying primary MileagePlus cardholders and Star Alliance Gold. Confirm the exception in your booking; this default checker does not determine route or membership eligibility.
Economy
1 cabin bag
55.9×35.6×22.9 cm
Premium Economy
1 cabin bag
55.9×35.6×22.9 cm
Business
1 cabin bag
55.9×35.6×22.9 cm
First Class
1 cabin bag
55.9×35.6×22.9 cm
Baggage fees
No reliable fixed price is listed here. Check your booking for the cost of adding a bag; an unlisted price does not mean it is free.
Official baggage policyHow to use this policy
Check cabin bag dimensions, weight and personal-item limits separately. A bag has to pass every published limit at once; being under the length and width limit does not help if the depth, weight, or fare-specific allowance is tighter.
Editorial signal only. Airport behavior varies; the published allowance still governs.
United Airlines liquids policy
For ordinary liquids at US security: containers up to 3.4 fl oz (100 ml) in one quart-size clear, sealable bag. Check TSA rules for medical and infant exceptions.
Family & Infants
Infant (under 2)
Under two: US domestic lap travel is free, without a checked-bag allowance in the infant's name. International infant tickets and partial fares/taxes depend on the destination; 10% is not a universal fare.
Stroller
One stroller or folding wagon per child may be checked free. Large/non-collapsible strollers and non-folding wagons must be checked at the ticket counter.
Car seat
One car seat per child may be checked free at the counter or gate. In-cabin use requires an approved restraint and a suitable seat; exit rows and Polaris on Boeing 767/777/787 are excluded.
Frequently asked questions
What is the United Airlines cabin bag size?
Does United Airlines have a weight limit for carry-on?
Does United Airlines allow a personal item?
How strict is United Airlines about bag size?
Additional notes
Sources and scope
Source-based research; no hands-on test or specialist review claimed.
One 22×14×9 in carry-on and one 17×10×9 in personal item; Basic Economy route/status/card exceptions, wheels and handles, liquids guidance and United Express restrictions.
United-operated allowance; no numeric cabin weight cap on this page. CommutAir permits only a personal item; other United Express aircraft may need gate checking. Fees are itinerary/date dependent and remain unquoted in the fee engine.
Size limits; Liquid, gels and sprays; Basic Economy bag limits; Gate-checked bagsSource review: · Codex (AI source review)
Lap-infant price varies by destination; free stroller/car-seat checking has quantity, size and cabin-placement conditions.
United family policy; replaces universal 10% infant fare and unconditional cabin car-seat claims.
Ticketing options; Getting to the gate; Car seats; FAQs: lap-child cost and checking car seat/strollerSource review: · Codex (AI source review)
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Rules can change. Always verify with United Airlines before flying.