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: 20th May 2026
Free Carry-On Allowance
1 carry-on bag + 1 personal item
Included on most fares
Carry-On Bag Size
56 × 35 × 23 cm
Including handles and wheels
Personal Items Examples
Backpack, handbag,
laptop bag or briefcase
Must fit under the seat
Checked Bag Fees
First checked bag:
from approximately $45 USD
Second checked bag:
from approximately $55 USD
United Airlines baggage rules are designed around cabin baggage and personal item travel, with most passengers permitted one carry-on bag and one personal item onboard free of charge.
Carry-on bags must fit within United Airlines cabin baggage limits of 56 × 35 × 23 cm including handles and wheels, while personal items such as backpacks, handbags and laptop bags must fit underneath the seat in front of you.
United Basic Economy fares may include additional restrictions, with some routes allowing only a personal item unless a carry-on bag is purchased separately or included through status or route eligibility.
For many travellers, travelling with cabin baggage only can help avoid checked baggage fees, which commonly start from around $45 USD for the first checked bag on many United routes.
United also warns that bags exceeding cabin baggage limits may need to be checked at the gate, where additional charges can sometimes apply.
As with all international airlines, liquids carried in hand luggage must follow airport security rules.
Containers should normally be 100ml or smaller and packed inside a transparent resealable liquids bag when travelling from UK airports.
CabinCleared travel toiletries are designed to help travellers maximise cabin baggage space while staying within airport liquid restrictions.
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.
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.
