Parents flying with Ryanair can expect to be hit with an additional charge when it comes to booking flights. The budget airline, known for its no-frills approach, adds extra fees onto bookings for baggage, and for selecting seats.

However if you're willing to be allocated a seat by Ryanair, and you're fine with only taking a small bag on board, you don't have to pay anything other than a basic fare. Unless you're travelling with children under 12, that is.

As per Ryanair's terms and conditions, at least one adult must buy a seat - with this costing up to 10 euros per journey. Then, up to four children will be seated by the adult at no extra cost, and must sit within the same row.

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Elsewhere easyJet says people travelling with children do not need to pay for seats, although they are advised in this case to check in as soon as possible. Guidance on its website adds: "Whilst our seating system will always try to seat families together, seats are allocated on a first come first served basis so the earlier you check in the more likely you are to be seated together.

"If you leave it to the last minute it's possible that there may not be enough seats left for us to seat your family next to each other. We’ll still make sure each child under 12 is seated close to an adult on your booking. However we may only be able to arrange this at the airport or on board, which can cause delays for you and other passengers, and not everyone may be seated together."

Jet2holidays says: "As a family friendly airline we will always endeavour to seat children & infants under the age of 12 next to their accompanying adults. If this is not possible for any reason, we will ensure children are seated as close as possible, and no more than one row away.

"We would encourage you to pre-book your seats advance to ensure you reserve the seats you want for your travelling party."