easyJet, Ryanair, British Airways and Jet2 rules on sitting together

Booking flights online is both exciting and convenient, but the costs can soon start to stack up as you go through the process thanks to an array of .

As well as check-in fees, it's not uncommon for for and for , with passengers often having to fork out more cash for the pleasure of sitting next to their family and friends. But there's no law in the UK that requires airlines to seat families together on , so if you want to sit with each other you may have to accept paying extra just for the privilege.

For those who are travelling with children, Civil Aviation Authority (CAA) guidelines state that airlines should always aim to seat children under the age of 12 in the same row, or no more than one row or aisle away from their parents or guardian, so you should always be sat close together in this case, even if you're not in the very next seat.

The CAA explains: "Many airlines charge for seat selection. Carriers should aim to seat children under 12 in the same row, or no more than one row or aisle away, from their accompanying adult and make all reasonable efforts to seat a disabled person or person with reduced mobility with the person accompanying them. Most airlines have processes in place to ensure this happens, but we recommend you contact the airline to confirm their seating policies."

But for those who aren't travelling abroad with children, it can be hit and miss whether you end up sitting with your travel companion for the duration of your flight - and this can depend on what airline you're flying with.

Some airlines will seat people who book together free of charge, whether they are families or not, so paying extra to secure your seating is often unnecessary. But it's worth being aware of specific airline policies to see if it's worth paying for your seat when you book if you want to guarantee being seated with your companions.

Listed below are the seating policies in place on easyJet, Ryanair, British Airways and Jet2 flights that passengers should be aware of before booking.

easyJet

easyJet operates an allocated seating system, allowing passengers to select seats for an additional fee at the time of booking, or afterwards online. Passengers who choose not to select their own seat will be allocated one automatically when they check in.

The airline says: "Our system will try to allocate you seats close to other passengers on your Booking, but this depends on availability and is not guaranteed."

Ryanair

Ryanair offers the option to buy reserved seats or free seats, which are assigned randomly during check-in. Those who opt not to reserve a seat will be assigned one free of charge at check-in between 24 hours and two hours before departure, but this likely means you won't be seated with your travelling party.

The airline says: "We recommend that you reserve your seat when booking or when checking in to guarantee a seat beside your travel companions. If you choose not to reserve a seat, then a seat will be randomly allocated to you free of charge when checking in, but it is unlikely it will be beside your travel companions.

"For safety reasons, children under the age of 12 must sit beside an accompanying adult, and infants (aged 8 days to 23 months inclusive) must sit on an accompanying adult's lap. It is mandatory for an adult travelling with children under 12 (excl. infants) to reserve a seat.

"A maximum of four children for every one adult on the same booking will receive a reserved seat free of charge. This ensures parents of young children sit together during the flight. This will also allow you to check-in for your flight 60 days before departure. It is not mandatory for any other adults or teenagers in the booking to reserve a seat, however they may choose to do so if they wish to seat with the rest of the family."

British Airways

British Airways says passengers can see which seats are available together 24 hours before their flight, or when online check-in opens, and can choose their seat for free, unless you've booked a Basic ticket, in which case your seat is allocated to you.

But passengers also have the option to pay in advance to choose specific seats to guarantee sitting together for their flight. The cost of selecting a seat will vary depending on the type of seat and the cabin you're travelling in.

The airline says: "We'll do our best to seat your family together by assigning seats a few days before your flight departs. However, seat selection may be limited at that time and your seats may be split across different rows or the aisle.

"We'll make sure each child under 12 years sits next to an adult from your booking but children over 12 years are booked as an adult in our system and may sit separately."

Jet2

Jet2 will allocate seats on a first-come, first-served basis if passengers don't select their own seats online before check-in. It's possible to choose your seats when you book your holiday, or up to six hours before your flight.

The airline recommends pre-booking your seats for a fee if you want to guarantee sitting together, with prices varying depending on the location and route. Those who don't pre-book will be allocated seats by the airline.

Jet2 says: "If you don't pre-book your seats, they will be allocated when you check in online or at the airport on a first come, first served basis. Please note that seats across the aisle or in the row behind or in front are classed as 'together'. If you want to change your seat once you have booked and paid, you will need to pay the relevant seat charges.

"As a family-friendly airline we will always endeavour to seat children and 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 in advance to ensure you reserve the seats you want for your travelling party."