The useful question on a red-eye is not how to sleep better on a plane. It is whether you should be sleeping at all, and that depends entirely on which way you are flying — eastbound and westbound overnight flights call for opposite decisions.
A red-eye going east and a red-eye going west are different problems wearing the same clothes. Eastbound you land in the morning after a short night and every hour of sleep on the plane is an hour you do not have to borrow from the day. Westbound you land in the afternoon or evening, and sleeping the whole way is how people end up wide awake at 2am.
Decide which of those you are on before you board, because the in-flight choices follow from it and there is no way to correct them later.
Most overnight flights people ask about are transatlantic eastbound — six hours or so, leaving in the evening and landing mid-morning. Here is what the tool makes of that shift.
6h eastward shift. ~4 days to full adaptation.
| Factor | This route |
|---|---|
| Direction | eastward — 6 hours |
| Severity | moderate |
| Days to adapt | about 4 |
| Harder or easier direction | Harder. Advancing the body clock is slower than delaying it. |
This is the day that decides the trip, and it is the day where the right timing is least obvious.
All times are destination local time, for a traveller who normally sleeps 11:00 PM to 7:00 AM. Enter your own hours in the jet lag tool for a schedule built around your sleep rather than this example.
| What to do | When |
|---|---|
| Bright light on waking (30+ min) | 10:30 AM - 1:30 PM |
| Avoid bright light (dark glasses) | 5:30 AM - 9:30 AM |
| Target sleep window | 3:30 AM - 11:30 AM |
| Melatonin (0.5 mg) | 10:30 PM - 11:30 PM |
The full New York to Europe plan · Pack a red-eye into a carry-on
Flying east, yes — you are landing in the morning and you need whatever sleep you can get. Flying west, be more careful: sleeping the whole way often means arriving wide awake in the evening and waking at 3am.
At boarding. It is a small thing that makes every later decision easier, because you stop calculating and start simply acting on the time you see.
Timing matters more than dose, and the right time depends on your route rather than on the flight. The jet lag tool places it against your target bedtime at the destination.
It shortens the time to fall asleep and worsens the sleep that follows, which is the wrong trade on a night you have few hours to work with. Cabin air already dehydrates.
Get outside. Daylight at the right time is the strongest signal available, and on an eastbound arrival the morning is exactly when you want it — though the first day is the one where the timing is least intuitive.