Arrival reset

A practical jet lag plan for long-haul arrivals

Jet lag is a normal response to crossing time zones quickly. You cannot eliminate it, but you can reduce its friction with a simple plan: shift your sleep before travel, use light and rest at the right times, stay hydrated, and avoid the habits that make it worse.

Open the plan

A compact route: HOME → FLIGHT → DAYLIGHT → LOCAL TIME.

The short answer

The CDC Yellow Book suggests shifting sleep toward destination time for a few days before travel, timing light and sleep to destination time, staying hydrated, avoiding excess alcohol, and taking short 20–30 minute naps rather than long daytime sleep.
Set your watch to destination time as soon as you board, and plan your rest around that schedule.
This is general travel comfort information, not medical advice. If you have a sleep disorder or take medication, talk to a healthcare professional.

Worked check

A three-day clock-shift example

The CDC gives an example of shifting sleep about one hour per day for two or three days. A traveler moving bedtime one hour earlier on each of three nights makes a three-hour shift before an eastbound trip.

Day −3Bedtime one hour earlierOne hour shifted

Day −2Bedtime one more hour earlierTwo hours shifted in total

Day −1Bedtime one more hour earlierThree hours shifted in total

Arrival dayFollow local daylight and bedtimeUse a 20–30 minute nap only if needed

Start before you fly: shift your sleep

The CDC Yellow Book notes that jet lag follows rapid travel across time zones. One useful measure is to shift sleep toward destination time for a few days before travel. If you fly east, go to bed earlier. If you fly west, go to bed later. Its example uses a shift of about one hour per day for two or three days.

The goal is to start the new schedule before departure when that is practical. Keep the direction the same each night, and protect enough time for sleep.

For two or three days before travel, move your bedtime about one hour per day toward destination time when practical.
Use the same direction each day: earlier for eastward travel and later for westward travel.
The night before, aim for a full night's sleep if possible.
On travel day, wake up at your destination's morning time if you can.

Use light and sleep at the right times

Light is a powerful signal for your body clock. The CDC Yellow Book suggests timing light and sleep to destination time. If it is daytime at your destination, seek light and stay awake. If it is nighttime, dim the lights and sleep. On the plane, this may mean keeping your window shade open when it is daytime at your destination, or closing it when it is nighttime.

Sleep on the plane is not a substitute for a full night, but it can take the edge off. If you cannot sleep, rest with your eyes closed and your headphones on. Avoid long daytime sleep at your destination, which can push your body clock further off schedule.

Set your watch and phone to destination time as soon as you board.
If it is daytime at your destination, keep the shade open and stay awake.
If it is nighttime at your destination, close the shade and use an eye mask.
On arrival, get outside during daylight hours if you can.
Avoid bright screens late at night at your destination.

Hydrate and limit alcohol

The CDC Yellow Book says volume loss can worsen the physical signs of jet lag. Stay hydrated and avoid excess alcohol. An empty bottle can pass security and be filled afterward where a drinking-water point is available.

The CDC also treats caffeine as a timed tool for alertness. Use it only when wakefulness fits the destination schedule, and avoid it near your planned sleep time.

Fill your empty water bottle after security.
Drink water during the trip.
Avoid excess alcohol.
Use caffeine only when it is daytime at your destination.
Stop caffeine well before your planned sleep time.

Take short naps, not long ones

If you arrive during the day and feel exhausted, a short nap can help. The CDC Yellow Book suggests short 20–30 minute naps rather than long daytime sleep. A long nap can make it harder to fall asleep at your destination's bedtime, which delays your adjustment.

Set an alarm for 20–30 minutes. After the nap, return to the local daytime plan and seek daylight at the time recommended for your direction of travel.

Set an alarm for 20–30 minutes.
Keep the nap within the CDC's 20–30 minute range.
Return to local daytime activities after the nap.
Use daylight at the timing that fits your direction of travel.
Avoid a long nap late in the destination day if it would make local bedtime harder.

Plan your first day at the destination

When you can choose a flight, the CDC suggests an arrival time that supports useful light exposure. After arrival, follow local daytime and bedtime. Stay awake during the local day when practical, then sleep during the local night.

Keep the first day light. Spend time outside when that fits the CDC light-timing plan, eat at local meal times, and leave room for a short nap if needed.

Choose an arrival time that supports useful light exposure when possible.
On arrival, go outside for daylight if it is daytime.
Eat meals at local times to help your body adjust.
Stay awake until a normal local bedtime.
Keep the first day's schedule light and flexible.

Know when to seek professional advice

This guide is general travel comfort information, not medical advice. If you have a sleep disorder, take medication that affects sleep, or have a health condition that makes travel difficult, talk to a healthcare professional before you fly. They can give you advice specific to your situation.

If jet lag persists for more than a few days or interferes with your ability to function, consider speaking with a healthcare professional. The CDC Yellow Book is a useful reference, but it is not a substitute for individualized care.

Review your medications with a healthcare professional before travel if they affect sleep.
Ask about any health conditions that could worsen with time-zone changes.
Follow the CDC Yellow Book's general measures as a starting point.
Seek advice if jet lag persists or affects your daily function.
Do not start or stop any medication without professional guidance.

Packing plate

Jet lag plan: when to do what
When	Do	Avoid
2–3 days before travel	Shift bedtime about one hour per day toward destination time when practical	A last-minute all-night schedule change
Night before travel	Keep the same gradual shift and protect sleep time	Excess alcohol and avoidable sleep loss
Travel day	Set watch to destination time; hydrate; plan rest around destination schedule	Heavy meals and excess alcohol
On board (destination daytime)	Stay awake; seek light; keep shade open if possible	Long naps that make it harder to sleep at night
On board (destination nighttime)	Sleep if you can; use eye mask and earplugs; close shade	Bright screens and caffeine
Arrival day	Seek daylight; eat at local times; stay awake until local bedtime	Long daytime sleep that makes local bedtime harder
First night	Go to bed at a normal local time; keep the room dark and cool	Screens and caffeine late in the evening

Questions before departure

Quick answers

How long does jet lag usually last?

Jet lag duration varies by person and by the number of time zones crossed. The CDC Yellow Book notes that jet lag follows rapid travel across time zones and suggests measures like shifting sleep before travel and timing light and sleep to destination time. If it persists or interferes with function, consider professional advice.

Should I sleep on the plane if it is daytime at my destination?

If it is daytime at your destination, the CDC Yellow Book suggests staying awake and timing light to destination time. If you need rest, take a short 20–30 minute nap rather than a long sleep.

Does alcohol help with jet lag?

The CDC Yellow Book suggests avoiding excess alcohol. Alcohol can disrupt sleep quality and contribute to dehydration. If you choose to drink, keep it moderate and drink water as well.

Are there medications for jet lag?

This guide does not offer medication advice. If you are considering medication for sleep or jet lag, talk to a healthcare professional. They can advise based on your health history and medications.

What if I have a sleep disorder?

If you have a sleep disorder or a health condition that affects sleep, talk to a healthcare professional before travel. The CDC Yellow Book provides general measures, but individual advice is important.

Checked sources

Where the rules come from

Rules change. Confirm the current policy with your operating airline and airport before departure.

CDC Yellow Book: jet lag