There's no trick that makes a 12-hour flight short, but a handful of practical choices — where you sit, when you sleep, what you eat and drink, and how you move — make a real difference to how you feel getting off the plane, and most of them cost nothing beyond a bit of planning before you fly.
Choosing your seat
Where you sit shapes the whole flight more than almost any other decision you make in advance. A window seat gives you something to lean against and control over the shade, at the cost of having to disturb neighbours to get up; an aisle seat makes it easy to move around freely, which matters more than it sounds on a long flight, at the cost of being disturbed yourself by others passing. Bulkhead and exit-row seats offer more legroom but often have fixed armrests and no under-seat storage, and can be colder or noisier depending on their position relative to galleys and toilets — check a seat map site or your airline's own seat guide before booking rather than assuming "extra legroom" is a straightforward upgrade in every respect.
Seats towards the front of a cabin section tend to be quieter and get served food first; seats near galleys and toilets see more foot traffic and light through the night. If sleep is your priority, a window seat away from a galley or toilet, ideally in a forward section, is generally the best combination available without paying for a premium cabin.
Managing sleep and body clock
The single most effective jet lag strategy most travellers skip is shifting your sleep and light exposure before you fly, not just on the plane — even a partial shift toward your destination's time zone in the day or two beforehand reduces the adjustment needed on arrival. Once airborne, try to sleep (or at least rest with eyes closed and no screen) according to the destination's night-time, not your point of origin's, using an eye mask and earplugs or noise-cancelling headphones to block the cabin's artificial light and engine noise. Melatonin is used by many long-haul travellers to help shift sleep timing, though its regulatory status and typical dosing vary by country, so check what's appropriate and legal where you are rather than assuming a standard dose.
Food and hydration
Cabin air is significantly drier than normal room air, and that dehydration is one of the biggest contributors to feeling wrecked after a long flight — drink water regularly through the flight rather than waiting until you're thirsty, and treat coffee, tea and alcohol as things to moderate rather than avoid outright, since all three add to fluid loss. Bringing an empty bottle through security and filling it airside avoids relying entirely on the drinks trolley's schedule. Eating lighter than you might at home helps too — heavy, rich meals at altitude, combined with lower cabin pressure and lower activity, are a common cause of feeling bloated and sluggish rather than rested.
Movement and circulation
Sitting still for many hours in a pressurised cabin increases the risk of deep vein thrombosis (DVT), a blood clot that can form in the legs — the risk is generally low for most healthy travellers but rises with flight length and personal risk factors such as recent surgery, pregnancy or a history of clotting. Walking the aisle every couple of hours, doing simple ankle and calf exercises in your seat, and avoiding crossing your legs for long stretches all help keep circulation moving. Compression socks are a low-cost, low-effort precaution worth considering for very long flights, particularly if you have any personal risk factors — check with a doctor beforehand if you're unsure whether they apply to you.
What to actually pack in your bag
- A refillable water bottle, filled after security.
- An eye mask, earplugs or noise-cancelling headphones, and a travel pillow suited to how you actually sleep (neck pillows don't work for everyone).
- A light layer or scarf — cabins run cold, especially overnight, and blankets provided are often thin.
- Basic toiletries for freshening up before landing — a toothbrush and a small moisturiser make a real difference given cabin dryness. Keep any liquids within the standard limits; see our guide to hand luggage rules on liquids and sizes.
- A note of your travel insurance policy details — worth having to hand in case of a medical issue or a significantly disrupted journey.
- A downloaded film, book or podcast rather than relying entirely on the seatback screen or in-flight WiFi, which can be unreliable or slow.
Coping with turbulence and anxiety
Turbulence is uncomfortable but rarely dangerous — modern aircraft are built to withstand far more stress than passengers typically experience, and pilots actively route around the worst of it where they can. If flying anxiety affects you, a window seat with a view of the horizon, slow breathing exercises, and simply knowing what different noises and movements mean (a common source of unnecessary worry) all help. Keeping your seatbelt fastened whenever seated, even when the sign is off, is the standard advice for the rare case of unexpected clear-air turbulence, which can occur without warning.
Managing a connection at the other end
Long-haul flights very often feed into a connecting flight rather than ending the journey, and arriving tired is exactly when a tight connection becomes stressful rather than routine. Check your minimum connection time against the realistic layout of your arrival airport rather than the bare published minimum — our guide to minimum connection times explained covers how much buffer is sensible. If checked baggage is involved, see connecting flights and checked baggage for whether it transfers automatically or needs rechecking. And if a long layover tips into an overnight wait, our guide to sleeping in airports covers how to do it as comfortably as possible.
Arrival routine: the last hour matters
In the final hour before landing, get up, stretch, and if possible use the toilet to freshen up rather than doing it all at once during a rushed final descent. Adjust your watch and your mindset to the destination time as soon as you board, not just when you land, since treating the flight as "night" or "day" according to where you're going — not where you came from — is one of the more effective ways to reduce the jet lag hit on arrival. Try to get natural daylight as soon as possible after landing if it's daytime at your destination; it's one of the strongest signals for resetting your body clock.
Frequently asked questions
What is the best seat for sleeping on a long-haul flight?
A window seat away from galleys and toilets, ideally towards the front of a cabin section, generally offers the best combination of something to lean on and fewer disturbances from cabin activity and light.
Does alcohol help you sleep on a plane?
It may help you fall asleep faster but reduces genuine sleep quality and worsens cabin dehydration, generally leaving you feeling worse rather than better on arrival.
Should I worry about blood clots on a long flight?
The risk (DVT) is generally low for healthy travellers but rises with flight length and personal risk factors. Moving regularly, simple leg exercises and compression socks all help reduce it.
How do I deal with jet lag after a long-haul flight?
Start shifting your sleep and light exposure before you fly if possible, treat the flight's rest periods according to your destination's time zone, and get natural daylight as soon as you can after landing.
Sources and further reading:
- World Health Organization guidance on air travel and health, including DVT risk factors.
- IATA for general background on cabin conditions and airline passenger guidance.
- Individual airline health and wellbeing advice pages for flight-specific guidance.