Jet lag from Sydney to London with kids

Trip at a glance

• Time difference−9 hvaries with DST
• Body-clock shift9 hours laterdelay (easier)
• Days to adjust~6 (5 with head start)adults; kids similar
• Flight time~23h 20mtypical travel time estimate

Get your exact plan for Sydney → London

What does a family jet lag plan for Sydney → London look like?

Sample built by the calculator for 2 adults and kids aged 3 and 8, departing Jul 1 with a 2-day head start. Home bedtimes: adults 10:30 PM, kids 7:30 PM, everyone up at 6:30 AM. Times before the trip are Sydney time; after arrival, London time.

How do you beat jet lag from Sydney to London, step by step?

1. Pre-shift at home: For 2 days before you fly, move bedtimes and wake times later each day (adults 60 min, kids 4–8 30 min, babies/toddlers 15 min), with bright light in the evening.
2. Switch to destination time on board: Set devices to London time and eat on its meal schedule.
3. Sleep on the plane: Sleep about 2:45 AM–6:30 AM destination time.
4. Time your light: Day 2: get bright light 4:30 PM–9:00 PM. The windows move later each day; follow the daily plan.
5. Bedtime on local time: Adults around 9:00 PM on night 1, reaching 10:30 PM by day 6. Wake at a fixed time even after a bad night.
6. Short, early naps: Adults/older kids ≤ 20–30 min; little ones keep naps but on local time, ending by ~4 PM.
7. Melatonin (optional): Usually not needed westward; adults 0.5 mg only for early-morning waking.
8. Meals, caffeine, movement: Eat on local time, hydrate, skip alcohol, adults caffeine mornings only, outdoor activity in the light windows.

What's different about Sydney → London?

• Flying west is the easier direction. Expect early wake-ups (4–5 AM) the first mornings; keep lights dim and treat it as night until the planned wake time.
• The two places change clocks in opposite seasons (or on different dates), so the gap moves during the year: 9 hours Apr 4–Oct 2; 11 hours Jan 1–Mar 27 and Oct 31–Dec 31; 10 hours Mar 28–Apr 3 and Oct 3–Oct 30 (2027 dates).
• At roughly 23h 20m of travel, this is a long-haul day. Pack two "sleep kits" (pajama layer, eye mask, lovey) and plan meals on London time.
• On a typical 11:00 AM departure, the flight overlaps night in London. Aim for sleep from about 2:45 AM to 6:30 AM local time, then land ready for a full day.
• London sits far north (52°N). Winter mornings are dark until about 8 AM, so use a bright window or light box during morning light windows; summer sunsets after 9 PM make kids' bedtimes harder, so pack blackout covers.

What should each age do?

• Babies & toddlers (0–3): keep naps on London clock time and end the last nap by about 4 PM. No melatonin.
• Kids 4–8: one nap of up to 45 minutes before 2 PM on arrival day only if needed, then outdoor play in the light windows.
• Tweens & teens: naps of 20–30 minutes max, devices off an hour before bed.
• Adults: melatonin usually isn't needed going west; caffeine is fine until mid-afternoon to make it to local bedtime.

Guides by age

• Jet lag with a baby: naps, feeds and daylight
• Jet lag with a toddler: early wakes and nap caps
• Jet lag with kids 4–8: outdoor play and bedtime routines
• Jet lag with teens: morning light and phones
• Flying west with kids

What about the trip home?

Coming home to Sydney is a 9 hours eastward shift (usually harder): plan about 9 days to readjust. How to handle jet lag on the way home.

Related routes

• New York → London
• Los Angeles → London
• Denver → London
• Chicago → London

Open the calculator with this route

Not medical advice. General sleep and travel guidance based on published circadian research. Ask your doctor or pediatrician about melatonin or other supplements, pregnancy, medications or health conditions. Never give melatonin to babies or toddlers.