Cabin bag vs checked bag: which one your trip actually needs

A cabin bag travels with you, under the seat or in the overhead locker; a checked bag is dropped at the check-in desk and travels in the aircraft hold. Choose a cabin bag if your trip fits in it and your toiletries come in 100ml bottles. Choose a checked bag if you need full-size liquids, more weight, or more room than the airline's cabin size allows.

For most short trips the cabin bag wins, and our carry-on backpacks for 5 to 7 days are designed for exactly that decision. The airline and UK security rules below were checked on 5 November 2026.

Cabin bag vs checked bag: side by side

	Cabin bag	Checked bag
Where it travels	Under the seat or in the overhead locker	Aircraft hold
Free on Ryanair and easyJet?	One small under-seat bag, yes; the larger overhead bag is paid or included in some fares	Added to the booking
Typical size	Ryanair: 40 x 30 x 20 cm free, 55 x 40 x 20 cm for the 10kg bag. easyJet: 45 x 36 x 20 cm free, 56 x 45 x 25 cm for the large bag	Ryanair 20kg bag: up to 80 x 120 x 120 cm
Weight	Ryanair 10kg bag: 10kg. easyJet: up to 15kg per cabin bag	Ryanair: 10kg, 20kg or 23kg options
Liquids	100ml containers at most UK airports; some airports allow up to 2 litres	The government advises packing liquids in the hold where possible
Airport time	Straight to security	Bag drop before security, then the carousel on arrival

Checked 5 November 2026 on Ryanair's help centre, easyJet's cabin bag page and GOV.UK's hand luggage rules. Fares and allowances change; check your own booking.

Choose a cabin bag if…

A cabin bag is the better choice when the trip is short, the airline's cabin size holds what you need, and you would rather not queue twice. With a cabin bag you go straight to security, and the bag stays with you on board.

• Your trip is a few days long. A weekend fits in the free under-seat bag; a week fits in an overhead bag if you pack by outfit.
• Your toiletries are in travel sizes. At most UK airports, liquids in hand luggage must be in containers of 100ml or less, even if the container is only part full.
• You carry a laptop or valuables. Laptops, phones and tablets are allowed in hand luggage, and GOV.UK asks that they are charged: a device that does not switch on when requested will not be allowed onto the aircraft.
• You want to leave quickly on arrival. No bag drop and no carousel.

Choose a checked bag if…

A checked bag is the better choice when what you need does not fit the cabin rules, by size, by weight or by what it is. On Ryanair, check-in bags come in 10kg, 20kg and 23kg versions, dropped at the check-in desk before security.

• You need full-size liquids. Sun cream, shampoo or a bottle you are bringing home. GOV.UK advises packing liquids in hold baggage where possible.
• You are away for longer, or carrying bulky items. A 20kg Ryanair check-in bag can measure up to 80 x 120 x 120 cm, far beyond any cabin size.
• You pack a lot of food or powders. These can obscure x-ray images and lead to a manual check of your hand luggage; GOV.UK suggests the hold to minimise delays.

What goes where: the items that decide it

Some items settle the question on their own. UK government guidance on hand and hold luggage, checked on 5 November 2026, gives these rules:

• Lighters: only one lighter on board, in a resealable plastic bag kept on you throughout the flight. A lighter cannot go in hold luggage.
• E-cigarettes: allowed in hand luggage, not in hold luggage.
• Hairdryers, straighteners and electric shavers: allowed in both hand and hold luggage.
• Spare batteries and power banks: cabin bag only. GOV.UK refers you to the Civil Aviation Authority, whose baggage rules (checked 5 November 2026) say spare lithium batteries and power banks are not allowed in checked baggage. Up to 100 Wh needs no airline approval, 100 to 160 Wh needs the airline's approval, and the limit is two spare batteries and two power banks per person.
• Medicines and baby milk: liquid containers up to 2 litres are allowed through security at all UK airports for essential medical purposes, special dietary needs, or baby food and milk.

The liquids rules now vary from one UK airport to another, so check the government's liquids rules for hand luggage and your departure, transit and return airports before you pack.

Making a cabin bag do the work of a checked bag

The size that matters is the one your airline sets, not the label on the bag. We checked our own range against the two free under-seat sizes, using the dimensions on each product page on 5 November 2026: of 197 bag models with three listed dimensions, 147 sit within Ryanair's 40 x 30 x 20 cm and 180 within easyJet's 45 x 36 x 20 cm. For more than a weekend, you need the overhead bag.

The Everyday carry-on backpack compresses to 55 x 40 x 20 cm according to its product page: Ryanair's 10kg cabin bag size, and inside easyJet's 56 x 45 x 25 cm large bag. The page gives a 60-litre capacity using vacuum compression, a 17-inch laptop compartment, a dry/wet section and waterproof Oxford fabric. Worth knowing: it is an overhead bag, so on Ryanair and easyJet it has to be booked or included in your fare, and its 5 cm expansion would take it past Ryanair's 20 cm depth.

The Sunday vacuum compression backpack has the same 55 x 40 x 20 cm compressed size, 60 litres and 17-inch laptop compartment, according to its product page. Worth knowing: its page lists Oxford fabric without the word waterproof, which the Everyday's page specifies, and a full 60-litre bag still has to stay within the airline's weight limit: 10kg for Ryanair's cabin bag.

Frequently asked questions

What is the difference between a cabin bag and a checked bag?

A cabin bag stays with you in the cabin, under the seat or in the overhead locker, while a checked bag is dropped at the check-in desk and travels in the aircraft hold. On Ryanair and easyJet, one small under-seat cabin bag is free per passenger; checked bags are added to the booking.

Can a cabin bag be checked in?

Yes, a bag sold as a cabin bag can travel in the hold if you book a checked bag allowance for it. It can also happen at the gate. On easyJet, a cabin bag that is too big, or a large bag not included in your booking, goes in the hold and charges apply. On Ryanair, a bag that does not fit the sizer is refused or, where available, placed in the hold for a fee.

Should batteries go in hand luggage or the hold?

Spare lithium batteries and power banks go in hand luggage, never in the hold. The Civil Aviation Authority's baggage rules, checked on 5 November 2026, allow up to 100 Wh without airline approval, 100 to 160 Wh with the airline's approval, and at most two spare batteries and two power banks per person. Keep devices charged, too.

Can I put a lighter in my checked bag?

No. UK government guidance says you can carry one lighter on board, inside a resealable plastic bag that you keep on you throughout the flight, and that you cannot put it in your hold luggage. The rule was checked on GOV.UK on 5 November 2026.

Is it better to check a bag or carry on?

Carry on if the trip fits your airline's cabin size and your toiletries are in 100ml containers: you skip the bag drop and the carousel. Check a bag if you need full-size liquids, more weight than the cabin allowance, or a case larger than 55 x 40 x 20 cm on Ryanair.

The verdict

If you travel for a weekend with travel-size toiletries, take a cabin bag and nothing else. If you go for a week, an overhead cabin bag usually still does it, provided it matches your airline's size. If you are bringing full-size liquids, sports kit or shopping home, book the checked bag. And if Ryanair is your airline, our guide to Ryanair cabin bag sizes sets out every option.