Many people choose not to check bags to save money, but this means they must follow strict rules. If they make a mistake, they might have to pay extra at the airport.

Passengers should be careful not to pack too much or include the wrong items in their hand luggage. Airlines like Ryanair, British Airways, easyJet, and Jet2 are watching closely. One problem with only bringing a carry-on bag is that there is not much space for belongings.

Many airlines only let passengers bring one small bag for free, which is not enough for a short trip. The key is to pack smart, not too much.

Ryanair and easyJet passengers should not pack three items in their hand luggage.

This means thinking about the things they usually pack and deciding if they are really needed.

Matthew Corrigan said, 'Do not pack things like hairdryers, towels, and toiletries that the hotel will provide. Only bring what you need and share things like phone chargers.'

Hairdryers are big and often not necessary to bring.

Most hotels have hairdryers, so there is no need to pack one.

Towels are also big and should not be packed unless the hotel does not provide them.

Toiletries can add weight and cause problems at security. It is better to buy them when you arrive or use small sizes.

For cold places, do not pack big clothes like coats or jumpers.

Matthew said, 'Wear big items like jumpers and coats on the plane to save space and stay warm.'