Baby and Toddler Jet Lag: Adjusting Sleep Across Time Zones

<p>Your toddler is wide awake at 3am and asking for breakfast. Jet lag isn't dangerous and it passes, but it can take a chunk out of a holiday. This guide explains how body clocks adjust, how to use light and routine, what to do on the first nights, and includes sample schedules east and west.</p>

Last reviewed: November 2026. Information comes from the US Centers for Disease Control and Prevention (CDC) Yellow Book, the NHS, the American Academy of Pediatrics (AAP), the American Academy of Sleep Medicine (AASM) and The Lullaby Trust. Most research on jet lag has been done with adults. We found no official guidance written specifically for babies and toddlers, so read the schedules here as practical suggestions and not as clinical advice. Talk to your doctor if your child has a health condition.

Your toddler is wide awake at 3am, cheerful, and asking for breakfast. Anyone who has crossed several time zones with small children knows the scene. Jet lag isn’t dangerous, and it passes, but it can take a chunk out of a holiday. Babies and toddlers can’t understand why the clock has changed, and they have nap needs that adults don’t. This guide explains how body clocks adjust, how to use light and routine to help, and what to do on the first few nights. It also includes a sample schedule you can adapt.

Quick answer

• Expect it to take several days. The CDC gives an average rate of adaptation of about 1.5 hours a day travelling west and 1 hour a day travelling east, based on adult evidence.
• Switch to local time as soon as you land. The NHS advises adapting sleep times quickly, and getting outdoors in the day. Meals, naps and play should all move to local time.
• Use light on purpose. Generally, morning light helps after travelling east, and evening light helps after travelling west.
• Keep nights dark, quiet and boring. Hold on to your usual bedtime routine.
• Don’t give melatonin or sleep medicine without medical advice. The AASM and AAP say to talk to a health professional first.
• Short trip of two or three days? It may be easier to stay on home time, if the local schedule allows.

Why it happens

Everyone has an internal body clock that governs sleep, hunger and alertness. The CDC explains that crossing time zones puts that clock out of step with the local day, and that it needs time to catch up. Because the body clock tends to run slightly longer than 24 hours, the CDC says, westward travel is generally easier to adapt to than eastward travel. The CDC bases its light advice on the direction of travel and the number of time zones crossed, which is why the timing of your outings matters as much as the timing of bed.

Step-by-step: before, during and after the flight

Before you go

1. Protect sleep in the days before. Try not to set off with a child who is already short of sleep.
2. Think about flight times. Pick the option that means least disruption if you can. A flight that lands in the afternoon means you only have to hold on until local bedtime.
3. Consider shifting by small amounts. You could move bedtime gradually by 15 to 30 minutes a day for a few days before a big trip. This is an optional idea of ours, and may not be worth the effort for a short trip.
4. Pack familiar sleep cues. That means the usual sleeping bag, comfort toy and story, and perhaps a blackout blind. Our baby travel packing list covers the rest.

On the plane

1. Feed and let them sleep when they need it. Young children shouldn’t be kept awake on a long flight to “fix” the schedule.
2. Set your watch to destination time when you board, so you start thinking in local hours.
3. Keep sleep safe. The AAP says to keep your child buckled in when the seatbelt sign is on, and to use a safe sleep surface where possible. See red-eye flights with toddlers and flying long-haul with a 1-year-old.

When you land

1. Go outside in daylight if you land during the day. The NHS recommends getting outdoors during the day.
2. Move meals to local time immediately, even if they are small. Babies should still feed on demand.
3. Allow a short nap in the afternoon if your child can’t make it to bedtime. Set a limit and wake them gently. The CDC notes that long naps may interfere with night-time sleep in adults, and the same may apply to toddlers.
4. Hold your usual routine at the local bedtime: bath, story, song, sleeping bag.
5. Keep overnight wake-ups dull. Use low light and calm voices, offer a feed or a drink if needed, and go back to bed. Screens and full lights send the wrong signal at 3am.

By age

A sample schedule: how to plan the first three days

This is an example only. It assumes a toddler who usually wakes at 7am, naps at 1pm and goes to bed at 7pm. Adapt it to your child.

Flying west (for example, London to New York, 5 hours behind)

Your child will feel it’s later than it is, so they’ll want to sleep early and wake early.

Flying east (for example, London to Tokyo, 9 hours ahead in winter)

Your child will feel it’s earlier than it is, so they’ll want to stay up late and sleep in. The CDC says this direction is generally harder to adapt to.

Don’t worry if the plan falls apart on the second night. These tables are a target, not a test.

Should you adjust at all on a short trip?

If you’re only away for two or three days, and only a few time zones away, you might be better off staying on your home schedule for naps and bed, with some small changes. It may not be possible on a long time difference, but on a two-to-three-hour shift it may be simpler than adjusting there and back.

Melatonin and medicines

This is where to be most careful. The AAP’s HealthyChildren site says melatonin should only be used after a discussion with your paediatrician. The AASM also advises parents to seek medical advice before giving melatonin to a child. Though it notes that melatonin can be useful for jet lag, the evidence isn’t about healthy young children crossing time zones. In the UK, the NHS says melatonin isn’t recommended on the NHS for jet lag because there isn’t enough evidence. The CDC notes that melatonin isn’t regulated by the FDA in the US, so what’s in the bottle may differ from the label.

The AAP also says not to give diphenhydramine to help a child sleep on a flight without speaking to your doctor. Don’t use any medicine to manage sleep unless your doctor says it’s right for your child.

Safe sleep when you’re all exhausted

Tired parents are at risk of unsafe sleep arrangements, especially at 4am. For babies, keep to the safer-sleep advice from The Lullaby Trust: a firm, flat sleep space, on their back, without loose bedding, and the right room temperature of 16 to 20 °C. Think through in advance what you will do if a baby wakes in the night, so you don’t fall asleep together on a sofa or armchair. Take turns at night if you are travelling with another adult. If you are alone, keep the first day’s plans light. Our hotel room babyproofing and toddler sleep check can help.

Common mistakes

• Keeping a baby awake on the plane to force tiredness on arrival. Let them feed and sleep when they need to.
• A long, late first-day nap. Tempting, but it can push bedtime back further.
• Bright lights and screens at 3am. Treat it as night, however awake your toddler seems.
• Packing the first full day with plans. Choose an outdoor park, not a timed ticket for a big attraction.
• Abandoning routines on holiday. The AASM recommends consistent bed and wake times and a calming routine for children.
• Forgetting the return trip. Plan a gentler first few days back at home, especially if nursery or school starts straight away.

Shopping by category

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