Flying Long-Haul with a 12 to 18-Month-Old: Seats, Sleep and Survival

Twelve to eighteen months is one of the hardest ages for a long flight: mobile, heavy, often too big for the bassinet, too young for films. This guide covers lap versus own seat, airline bassinet limits, car seats and the CARES harness, sleep devices, ears, food and a plan for the hours on board.

Last reviewed: October 2026. Airline policies change often. Check your airline’s own pages before you book and again before you fly.

Twelve to eighteen months is one of the hardest ages for a long flight. Your child is probably mobile, curious and heavy, may be on the edge of outgrowing the airline bassinet, and is too young to sit through a film. At the same time, they still nap, still feed often and still fit in a car seat, which gives you options. This guide covers the decisions that matter most on a long-haul flight with a one-year-old: whether to buy a seat, what the bassinet rules really mean at this age, car seats and harnesses, sleep, ears and food, and how to plan the hours on board.

Quick answer

• Bassinets are often outgrown at this age. Many airlines set a limit of about 11 to 14 kg, and some also require that the baby can’t sit up or can lie flat without bending their legs.
• A seat of their own with an approved car seat is what the US Federal Aviation Administration (FAA) and the American Academy of Pediatrics (AAP) call the safest option. It is also often the most comfortable for sleep.
• Sleep devices such as inflatable cubes and bed boxes are allowed by some airlines and banned by others. Check before you buy one.
• Feed or give a drink during take-off and landing to help with ear pressure.
• Plan the flight in blocks (meal, play, walk, sleep) and expect the first day after landing to be slow.

Lap or own seat?

On most airlines a child under two can travel on a parent’s lap. Qantas, for example, charges 10% of the adult fare on international flights for an infant under two who doesn’t occupy a separate seat (as of October 2026). Other airlines have their own infant fares.

The safety advice points the other way. The FAA says the safest place for a child under two on a US airplane is in an approved child restraint system (CRS) or device, not on your lap, because your arms can’t hold a child securely in unexpected turbulence. The AAP’s HealthyChildren.org guide (updated March 2026) says turbulence is the leading cause of children’s injuries on airplanes. The FAA adds that buying a ticket for your child is the only way to guarantee you’ll be able to use a car seat on board.

At 12 to 18 months there is also a comfort argument. A one-year-old on a lap for twelve hours means twelve hours with nowhere to put them down. Many parents find that a seat of their own, especially with a car seat the child already sleeps in, is the difference between a hard flight and an impossible one. If the budget doesn’t stretch, ask at check-in whether there is a free seat next to you. It isn’t guaranteed, but it is sometimes possible on quieter flights.

Airline bassinets: will your one-year-old still fit?

Bassinets attach to the wall at the front of the cabin (the bulkhead row) and are usually available only in limited numbers, first come first served. At 12 to 18 months, the key question is whether your child is still within the limits. Here is what five airlines say on their own websites, as of October 2026:

Sources: each airline’s family travel or bassinet page, checked 24 October 2026. The AAP notes that airline bassinets are usually for babies under about 6 months or 20 lb who can’t sit up.

In practice, many 12 to 18-month-olds are too long or too mobile for a bassinet, even if they’re under the weight limit. A child who can sit up, roll and pull themselves up isn’t safe in a shallow cot hanging off a wall. If you do book a bassinet seat, the bulkhead row still gives you extra floor space, but bear in mind that the armrests are usually fixed and there is no under-seat storage during take-off and landing.

Car seats on the plane

If you buy a seat, an approved car seat is the safest way for a one-year-old to fly. The FAA says the seat must be certified for aircraft use. In the US, look for the label “This restraint is certified for use in motor vehicles and aircraft”. Seats approved by a foreign government must carry the required label for that country. Read the manual to make sure it can be secured with an aircraft lap belt.

• The FAA says a car seat must be installed according to the manufacturer’s instructions, rear- or forward-facing as the label says for your child’s size.
• The AAP recommends a window seat for a car seat, so it doesn’t block anyone’s way out.
• If your approved car seat doesn’t fit in the seat you’ve been given, the FAA says the airline is responsible for finding another seat in the same class for it, on US flights.
• The FAA doesn’t allow booster seats, backless seats or baby carriers to be used during taxiing, take-off or landing.
• Board early if you can, so you can fit the seat without holding up the aisle.

Airlines outside the US have their own rules on which seats they accept and where. Check with your airline before you fly, especially if your car seat is large.

What about the CARES harness?

The FAA says AmSafe’s Child Aviation Restraint System (CARES) is certified for children up to 40 inches tall who weigh between 22 and 44 pounds (about 10 to 20 kg) and can sit upright in their own seat. It is approved for aircraft use only, not in cars, and the FAA warns about counterfeits sold online. The AAP points out that harnesses are not for infants. Some one-year-olds will be within the limits, but many are not, and some airlines outside the US apply their own rules. A car seat is usually the better choice at this age.

Sleep: making the most of the night

A one-year-old who sleeps well in a car seat at home often sleeps reasonably well in one on a plane. Other things that help:

• Choose the flight time with sleep in mind. A flight that departs near bedtime works for some children and not for others. If your child sleeps easily in new places, a night flight can work well. If not, a daytime flight and a normal bedtime on arrival may be easier.
• Keep the bedtime routine: pyjamas, a sleeping bag if they use one in their car seat, the same comfort toy, the same song.
• Dim the light with the window blind and a light cover over the car seat that doesn’t touch the child’s face or block air.
• Follow safe sleep rules. The AAP says the same safe sleep advice applies on a plane: a firm, flat surface, no pillows or loose blankets, and stay alert if your baby sleeps on your lap.

Sleep devices: check before you buy

Inflatable cubes, ride-on cases that turn into beds and leg hammocks are sold as a way to make a flat bed for small children. Airline rules on them differ a lot:

• Qantas allows manually inflated cubes in Economy and Premium Economy, not in exit or bulkhead rows, and says other devices, including hard-shell bed boxes and leg hammocks, must stay at home.
• Cathay Pacific accepts devices that don’t affect the seat or other passengers, giving the JetKids BedBox as an example, in seats where they don’t block anyone’s way, such as a window seat. It doesn’t accept devices such as Fly LegsUp or the Flyebaby hammock.
• Emirates doesn’t allow leg rests or seat-extension devices to be used on board, naming BedBox, Fly LegsUp and FLY-Tot among others.

The AAP says sleeper seats are an option only after a child’s first birthday, and that the child needs their own seat. Our guide to airplane beds for toddlers covers these rules in more detail.

Ears, illness and medicine

The AAP suggests breastfeeding, a bottle or a dummy during take-off and landing to help with pressure in the ears. For a one-year-old, a drink from a cup or something to chew also works. If your child has had an ear infection or ear surgery in the two weeks before the flight, the AAP advises asking your doctor whether it’s safe to fly. It also advises against giving antihistamines such as diphenhydramine to help a child sleep without asking a doctor first, because some children become more alert instead.

Pack any regular medicine in your hand luggage, in its original packaging, with enough for a few extra days in case your checked bag is delayed. If your child has a fever or seems unwell before the trip, talk to a doctor.

Food and drink

A one-year-old may be on milk, solids or both. Both TSA in the US and GOV.UK allow baby milk and baby food in hand luggage in larger amounts than the usual 100 ml limit, in reasonable quantities for the journey. Tell security at the start of screening. Our under-seat bag packing list covers the rules in detail.

• Request a baby or child meal when you book, but don’t rely on it. Bring food your child already likes.
• Pack plenty of small snacks: they fill time as well as stomachs.
• A cup with a lid, and an extra bottle, for the cabin.
• A bib and a change of clothes for the inevitable spill.

A plan for the hours on board

Long flights with a one-year-old go better in blocks than in one long stretch. A rough plan that many families find works:

1. Boarding and take-off: change the nappy just before boarding, as the AAP suggests. Feed or give a drink during take-off.
2. First hour: a new toy or book, a snack, a look out of the window.
3. Meal service: eat yourself first if your child is calm, then feed them.
4. A walk: when the seatbelt sign is off, walk up and down the aisle or stand near the galley if the crew allows it.
5. Sleep: bedtime routine, lights down.
6. Wake-up: nappy change, breakfast, a new activity.
7. Descent: feed or drink again, and keep a favourite toy in the seat pocket.

Our guide to quiet airplane toys has ideas that also work for younger toddlers.

Seats: where to sit

• Window if you’re using a car seat: the AAP and many airlines prefer it so the seat doesn’t block the aisle.
• Bulkhead for floor space and a bassinet, if your child still fits one.
• Never the exit row: children can’t sit there.
• Together: the AAP points to the US Department of Transportation’s family seating dashboard, which shows which US airlines guarantee that children can sit next to an adult at no extra cost. Singapore Airlines, for example, lets families with young children choose standard seats free of charge, first come first served.

After landing

A long flight with a one-year-old usually means a tired family and a body clock out of step. Get outside in daylight, keep the first day light, and try to move naps and meals towards local times. Our guide to flying long-haul with kids has more on the first day.

Shopping by category

If you need gear for the flight, these Amazon searches cover the main categories: FAA-approved car seats, car seat travel bags, leak-proof toddler cups and toddler travel sleeping bags. Check the aircraft label and your airline’s rules before you buy. We haven’t tested these products.

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