United Airlines Cabin Baggage, Carry-On & Checked Bag Rules
Understand United Airlines carry-on bag sizes, personal item rules, checked baggage fees and Basic Economy restrictions before you travel.
Last updated: 31st May 2026
United Airlines offers a flexible carry-on baggage policy that allows most passengers to travel with both a full-size carry-on bag and a personal item.
Like many U.S. airlines, baggage allowances vary depending on fare type, route and loyalty status, making it important to understand exactly what is included with your ticket before travelling.
Most passengers can bring one carry-on bag measuring up to 56 x 35 x 23cm, including handles and wheels, along with one personal item that fits beneath the seat in front.
Personal items typically include backpacks, handbags, laptop bags or briefcases.
As with all airlines, liquids carried through airport security must comply with local screening requirements and be carried in containers of 100ml or less when travelling through UK and European airports.
United's Basic Economy fares may have additional restrictions on some routes, with certain passengers limited to a personal item only unless they qualify for exceptions.
Checked baggage is generally charged separately on many domestic U.S. routes, with fees varying by destination, fare type and frequent flyer status.
For travellers looking to avoid checked baggage fees, stay organised and move through the airport more efficiently, making full use of United's carry-on allowance can often remove the need for checked luggage altogether.
Free Carry-On Allowance
One carry-on bag included*
One personal item included
ON MOST FARES
Carry-On Bag Size
Carry-on bag
Up to 56 × 35 × 23cm
INCLUDING HANDLES & WHEELS
Personal Items Examples
Backpack, handbag,
laptop bag or briefcase
Must fit under the seat
Checked Bag Fees
First checked bag
FROM APPROX. $45 USD
Second checked bag
FROM APPROX. $55 USD
Key United Airlines Baggage Tips
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Check your fare type carefully, as Basic Economy tickets may have additional carry-on restrictions.
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Most passengers can bring both a carry-on bag and a personal item at no extra charge.
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Ensure your carry-on bag does not exceed 56 × 35 × 23cm including handles and wheels.
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Keep your personal item small enough to fit completely beneath the seat in front of you.
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Backpacks, laptop bags, handbags and briefcases generally qualify as personal items.
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Check baggage fees before travelling, as charges vary by route, destination and fare type.
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Pack liquids in containers of 100ml or less when travelling through airports that apply standard liquid restrictions.
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Keep passports, medication, valuables and electronic devices in your personal item for easy access.
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Travelling with carry-on luggage only can often help avoid checked baggage fees on many United routes.
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Review your baggage allowance before departure, particularly if travelling on a Basic Economy ticket or international itinerary.
Cabin baggage sizes explained
Understanding the difference between small cabin bags, cabin suitcases and checked baggage helps you pack efficiently and avoid delays at the airport.
Travelling with hand luggage only?
United Airlines baggage rules and carry-on guide
United Airlines baggage rules vary by fare type, destination and cabin class, but most passengers can bring one personal item and one carry-on bag onboard free of charge.
Checked baggage fees and allowances depend on your route and ticket type, so understanding United Airlines’s cabin baggage rules can help travellers avoid unnecessary airport charges.
Basic Economy
Personal Item Included
(Fits under seat)
Carry-on suitcase
(56 × 35 × 23 cm)
No checked baggage
Fees vary by route
Best for:
Short trips and light travellers wanting lower fares
Economy / Economy Plus
Personal Item Included
(Fits under seat)
Carry-on suitcase
(56 × 35 × 23 cm)
Checked bag
(Typically from $35–$45 first bag)
Best for:
Travellers needing standard carry-on and checked baggage
Business / Polaris
Personal Item Included
(Fits under seat)
Carry-on suitcase
(56 × 35 × 23 cm)
Checked bag included
Typically up to 32kg
Best for:
Premium travel with more generous baggage allowances
Checked baggage with United Airlines: what you need to know
United Airlines checked baggage fees and allowances vary depending on your route, fare type and cabin class.
Most United passengers can bring one personal item and one carry-on bag onboard free of charge, while checked baggage is often charged separately on Economy fares.
On many domestic and international routes, United charges separately for the first and second checked bags, with fees commonly starting from around $35–$45 for the first bag and approximately $45–$55 for the second bag.
Standard checked baggage usually allows up to 23kg (50lb) per bag for most Economy passengers, while United Business and Polaris passengers may receive higher weight allowances up to 32kg (70lb) per bag.
Checked baggage should generally not exceed 158cm total dimensions (height + width + depth), with oversized or overweight baggage subject to additional fees.
United passengers are usually able to purchase checked baggage online, through the United app or during airport check-in, although airport pricing may sometimes be higher.
Travellers should also remember that U.S. airlines often place greater emphasis on cabin baggage and personal item allowances compared with some international carriers.
Key United checked baggage tips:
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Booking checked baggage online in advance may reduce airport costs
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Most United fares include one free carry-on bag and one personal item
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Basic Economy passengers should carefully check baggage restrictions before travel
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Standard checked baggage is typically limited to 23kg per bag on Economy fares
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United Business and Polaris passengers may receive larger baggage allowances
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Oversized and overweight baggage may incur significant additional charges
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Keeping toiletries and valuables in your cabin bag can make travel more convenient
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Always confirm route-specific baggage rules before travelling
United Airlines cabin baggage rules: liquids, extras and restrictions
United passengers can usually bring one personal item and one carry-on bag onboard free of charge on most fares.
Personal items should fit underneath the seat in front of you and commonly include handbags, laptop bags, small backpacks or similar compact bags.
United carry-on bags should generally not exceed 56 × 35 × 23 cm including wheels and handles and must fit safely in the overhead locker onboard.
Some smaller regional aircraft may have reduced cabin storage space, meaning larger carry-on bags could occasionally need to be checked at the gate before boarding.
Liquids carried in cabin baggage must follow airport security rules. When travelling from UK airports, liquid containers should normally be 100ml or smaller and fit inside a transparent resealable liquids bag.
Passengers should also remember that duty-free purchases, medicines and baby items may be subject to separate airport security guidance depending on the airport and destination.
\CabinCleared travel toiletries are designed to help travellers pack efficiently within UK airport liquid rules while maximising available cabin baggage space.
Common United cabin baggage mistakes to avoid
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Exceeding United carry-on bag size restrictions
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Bringing oversized personal items that will not fit under the seat
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Packing liquids larger than 100ml in cabin baggage
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Assuming checked baggage is included on all United fares
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Forgetting that regional aircraft may have reduced overhead locker space
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Overpacking carry-on bags beyond practical cabin limits
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Leaving valuables, medicines or travel documents inside checked luggage
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Failing to confirm route-specific baggage policies before travel
Cabin-approved travel kits make it easier to stay within liquid limits, pack efficiently, and get through airport security without hassle.
United Airlines baggage FAQs
1. What size carry-on bag can you take on United Airlines?
United Airlines carry-on bags should generally not exceed 56 × 35 × 23 cm including wheels and handles. Bags must fit in the overhead locker onboard.
2. Does United Airlines allow a free personal item?
Yes. Most United fares include one personal item free of charge. Personal items should fit underneath the seat in front of you and commonly include handbags, laptop bags or small backpacks.
3. Do United Basic Economy fares include a carry-on bag?
Some United Basic Economy fares may restrict full-size carry-on bags, particularly on certain domestic U.S. routes. Always check your fare conditions before travelling.
4. How much does checked baggage cost on United Airlines?
Checked baggage fees vary depending on route, fare type and destination. First checked bag fees on many U.S. routes commonly start from around $35–$45 USD.
5. What is the checked baggage weight limit on United Airlines?
Most Economy checked bags are limited to 23kg (50lb) per bag, while United Business and Polaris passengers may receive allowances up to 32kg (70lb) per bag.
6. Can you take liquids in hand luggage on United Airlines flights?
Yes. When travelling from UK airports, liquids in cabin baggage must normally be in containers of 100ml or smaller and packed inside a transparent resealable liquids bag.
7. What happens if your carry-on bag is too large?
Oversized cabin bags may need to be checked at the gate before boarding, particularly on smaller regional aircraft with limited overhead locker space.
8. Are cabin baggage rules different on international United flights?
Yes. Baggage allowances and fees can vary depending on route, destination and ticket type, so passengers should always confirm route-specific baggage policies before travelling.
9. Can you pay for checked baggage online with United Airlines?
Yes. United passengers can usually purchase checked baggage online, through the United app or during airport check-in, although airport pricing may sometimes be higher.
10. What is the best way to avoid baggage fees on United Airlines?
Travelling with only a personal item and carry-on bag can help avoid checked baggage fees. Using compact travel toiletries and packing efficiently also helps maximise cabin baggage space.
Travelling with hand luggage only?
Cabin-approved travel kits make it easier to stay within liquid limits, pack efficiently, and get through airport security without hassle.
