How long does jet lag last flying to Australia?

For a UK-to-eastern-Australia trip of roughly nine to eleven time zones travelling east, many people feel broadly adjusted in about six to ten days. Well-timed daylight and consistent sleep and meal times tend to help you feel functional sooner.

Is jet lag worse flying east or west?

Usually east. Flying east asks the body clock to move earlier (a phase advance), which most people find harder than moving later (a phase delay) when flying west.

How many days per time zone does jet lag take?

A common rule of thumb is that the body clock shifts roughly one time zone per day travelling east and up to about one and a half zones per day travelling west, so recovery often tracks the number of zones crossed adjusted for direction.

Guides · Updated 27 July 2026

How Long Does Jet Lag Really Last?

The honest answer is: it depends — mostly on how many time zones you crossed and which way you flew. But "it depends" isn't very useful when you're staring at the ceiling at 4am, so here's a realistic timeline and the factors that stretch it or shrink it.

The rough rule of thumb

The most widely used estimate is that your body clock resets by about one time zone per day when travelling east, and up to about one and a half zones per day when travelling west. So a five-zone eastward trip might take around five days to fully settle, while a similar westward trip could resolve in three or four. It's an average, not a promise — individual bodies vary — but it's a solid starting expectation.

Apply that to Australia and the numbers get real: a UK-to-eastern-Australia trip of nine to eleven zones, flown east, commonly takes somewhere in the region of six to ten days to feel broadly normal. That's why the journey to Australia has such a fearsome reputation — it's near the ceiling of what a body clock can be asked to do.

Want a number for your specific trip? The Recovery Plan calculator works out your true zone count and direction and gives an adjustment estimate, and the Severity Checker produces an indicative 0–100 severity score from six simple inputs.

Why east lasts longer than west

Flying east forces your clock earlier — a phase advance — and human circadian rhythms are naturally a touch longer than 24 hours, so they'd rather drift later than earlier. Moving the clock forward is like trying to fall asleep two hours before you're tired: possible, but it fights the grain. Flying west asks the clock to move later, which is more like happily staying up a bit longer, and generally settles faster. This is the single biggest reason two trips of identical length can produce very different recovery times.

What makes it faster

Correctly timed daylight. This is the strongest lever by far. Morning light tends to pull the clock earlier (helpful after flying east); evening light tends to push it later (helpful after flying west). Getting the timing right can meaningfully shorten the adjustment; getting it backwards can lengthen it.
Committing to local time immediately. Eating, sleeping and being active on the destination's schedule from day one gives your clock consistent cues to lock onto.
Arriving rested. A sleep debt from the pre-trip rush stacks on top of jet lag and drags recovery out.
Hydration and easing off alcohol. Won't reset your clock, but reduces the general grogginess that gets blamed on jet lag.

What makes it slower

More zones crossed. The further the shift, the longer the reset — unsurprisingly.
Flying east. As above, the harder direction for most people.
Napping at the wrong time. A long late-afternoon sleep can reset your clock in the wrong direction and prolong things.
Age, for some. Many people find adjustment a little harder as they get older, partly because sleep naturally becomes lighter — though the behavioural levers still work.

Is there a difference between "feeling okay" and "fully reset"?

Yes, and it's a useful distinction. You'll usually feel functional — able to work, socialise and enjoy your trip — well before your clock is fully reset. The lingering signs, like occasional early waking or an afternoon energy dip, often trail off in the background while you're already getting on with things. For a holiday or a business trip, feeling functional fast is often the real goal, which is exactly what our Business Trip Optimiser is built around — prioritising Day-1 readiness over a complete reset.

Can you prevent it, not just recover?

To a degree. Shifting your sleep schedule slightly toward your destination in the days before you fly — earlier for eastward trips, later for westward — gives your clock a head start, so you land partway adjusted rather than starting from zero. It won't eliminate jet lag on a big crossing, but it can shave time off the tail. The Recovery Plan builds this pre-trip nudge into its schedule.

When it's lasting too long

For most healthy people, jet lag is unpleasant but self-limiting and fades over the days above. If sleep problems persist well beyond the expected adjustment window, if you have a health condition affected by sleep or routine, or if you're pregnant, breastfeeding or take medication whose timing matters, it's worth speaking to a health professional rather than waiting it out.

For anything you take — including melatonin — consult your doctor or pharmacist. This site does not give medical advice.

Get your estimate. The Recovery Plan and Severity Checker turn "it depends" into a number for your actual trip. See all calculators →

This is a guide — check what works for your own situation, and consult a professional if you're unsure.