AIRLINE SIZE GUIDE
Cabin Bag Size Rules for 20 UK Airlines
We’ve validated the cabin bag dimensions directly from each airline’s official website — so you know exactly what fits before you buy.
Underseat (Small) Bag
The bag that goes under the seat in front of you. Always free, included with every ticket on every airline.
Overhead (Large) Bag
The bag that goes in the overhead locker. Free on some airlines, chargeable on others — check your booking.
How Dimensions Are Measured
Dimensions are Length × Width × Height in cm. Airlines measure the total bag including wheels, handles and pockets.
How Weight Is Measured
Weight is measured in kg of the total weight of the bag and its contents. Some airlines specify combined weight which means total combined weight of both underseat and overhead bags.
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