Trip at a glance
- Time difference+5 hvaries with DST
- Body-clock shift5 hours earlieradvance (harder)
- Days to adjust~5 (3 with head start)adults; kids similar
- Flight time~7h 30mtypical travel time estimate
Get your exact plan for Boston → Lisbon
What does a family jet lag plan for Boston → Lisbon 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 Boston time; after arrival, Lisbon time.
| Day | Adults bed | Age 8 bed | Age 3 bed | Light |
|---|---|---|---|---|
| Day −2 at home | 9:30 PM | 7:00 PM | 7:15 PM | Bright light on waking |
| Day −1 at home | 8:30 PM | 6:30 PM | 7:00 PM | Bright light on waking |
| Travel | Sleep on the plane 11:15 PM–5:20 AM Lisbon time | |||
| Day 1 arrive | 11:30 PM | 8:30 PM | 8:30 PM | Get light 7:30 AM–1:00 PM |
| Day 2 | 11:15 PM | 8:30 PM | 8:30 PM | Get light 7:15 AM–12:00 PM |
| Day 3 | 10:45 PM | 8:15 PM | 8:30 PM | Get light 6:45 AM–11:00 AM |
| Day 4 | 10:30 PM | 7:45 PM | 8:00 PM | Normal daylight |
How do you beat jet lag from Boston to Lisbon, step by step?
- Pre-shift at home: For 2 days before you fly, move bedtimes and wake times earlier each day (adults 60 min, kids 4–8 30 min, babies/toddlers 15 min), with bright light right after waking.
- Switch to destination time on board: Set devices to Lisbon time and eat on its meal schedule.
- Sleep on the plane: Sleep about 11:15 PM–5:20 AM destination time.
- Time your light: Day 2: get bright light 7:15 AM–12:00 PM. The windows move earlier each day; follow the daily plan.
- Bedtime on local time: Adults around 11:30 PM on night 1, reaching 10:30 PM by day 4. Wake at a fixed time even after a bad night.
- Short, early naps: Adults/older kids ≤ 20–30 min; little ones keep naps but on local time, ending by ~4 PM.
- Melatonin (optional): Adults 0.5–3 mg ~30 min before local bedtime for 3 nights; kids only with pediatrician OK; never babies/toddlers.
- Meals, caffeine, movement: Eat on local time, hydrate, skip alcohol, adults caffeine mornings only, outdoor activity in the light windows.
What's different about Boston → Lisbon?
- Flying east is the harder direction. Expect trouble falling asleep and groggy mornings for the first nights, so protect wake-up times.
- Watch the clock-change weeks: Mar 14–Mar 27 and Oct 31–Nov 6 the gap is 4 hours, because the two countries switch daylight saving time on different dates.
- On a typical 5:30 PM departure, the flight overlaps night in Lisbon. Aim for sleep from about 11:15 PM to 5:20 AM local time, then land ready for a full day.
- Use outdoor daylight in the plan's light windows; even a cloudy day outside is far brighter than indoor light.
What should each age do?
- Babies & toddlers (0–3): keep naps on Lisbon 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, and morning light matters because teens resist moving earlier.
- Adults: 0.5–3 mg melatonin about 30 minutes before local bedtime for a few nights is optional; caffeine in the morning only.
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 east with kids
What about the trip home?
Coming home to Boston is a 5 hours westward shift (usually easier): plan about 4 days to readjust. How to handle jet lag on the way home.
Frequently asked questions
How many hours ahead is Lisbon from Boston?
Lisbon is 5 hours ahead of Boston most of the year. Watch the clock-change weeks: Mar 14–Mar 27 and Oct 31–Nov 6 the gap is 4 hours, because the two countries switch daylight saving time on different dates.
How long does jet lag last flying from Boston to Lisbon with kids?
About 5 days without preparation. Shifting bedtimes earlier for 2 days before you fly (15–30 minutes a day for kids, 1 hour for adults) cuts it to about 3. Kids usually follow a similar timeline when they get outdoor daylight at the right times.
Should kids sleep on the flight from Boston to Lisbon?
Yes, on a typical overnight departure. Sleep roughly 11:15 PM–5:20 AM Lisbon time, which is night at your destination. Start a mini bedtime routine when the window opens.
What time should kids go to bed the first night in Lisbon?
For kids who normally sleep at 7:30 PM: about 8:30 PM for an 8-year-old and 8:30 PM for a 3-year-old on night 1, moving to their usual time over the next 3 days. Adults around 11:30 PM.
Is jet lag worse coming home to Boston?
The trip home is a 5 hours westward (delay) shift, usually the easier direction. Plan about 4 days to readjust, and run the calculator again for the return flight.
Related routes
Open the calculator with this route
Sources
- CDC Yellow Book 2026: Jet Lag Disorder. US Centers for Disease Control and Prevention guidance for travelers and clinicians.
- Eastman CI, Burgess HJ. How to travel the world without jet lag. Sleep Med Clin, 2009. The light-timing and pre-flight shifting method this calculator follows.
- Burgess HJ et al. Preflight adjustment to eastward travel: 3 days of advancing sleep with and without morning bright light. J Biol Rhythms, 2003. Shifting sleep 1 hour a day before an eastward flight.
How we turn this research into plans: methodology.
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.