How far ahead should you plan a long-haul journey?

Three things that run out

The first is time: the weeks when everyone wants to travel at once. Christmas and New Year somewhere warm, school holidays across Europe, cherry blossom and autumn leaves in Japan, the best months for the Greek islands or the Italian coast. In weeks like these, both flights through the big European hubs and the most-loved places to stay fill earlier than usual, and prices rise.

The second is places that are small by design. A safari camp with a handful of tents, a ryokan with ten rooms, a family-run guesthouse in the Tuscan hills, a small boat in the Galápagos. There can't be more of them – which is exactly why they're good. When a journey is built around a place like this, securing it becomes the pivot the whole trip turns on.

The third is permits. Some experiences are limited so that a place can stay the way it is: mountain gorilla trekking in Uganda and Rwanda, the classic Inca Trail to Machu Picchu, some of Patagonia's popular walking routes, where refuge and campsite nights need booking in advance. Numbers are capped, and for the most sought-after months they can sell out very early.

Ask not 'how long?', but 'what is scarce on this trip?'.

A rough timeline

These aren't rules but pointers, and they shift a little from year to year. Still, they help you see where you stand:

• Nine to twelve months or more: when a journey hinges on a permit or a very small place at a busy time – gorillas, the Inca Trail in the dry season, a safari during the great migration, a Kyoto ryokan in cherry-blossom week, somewhere warm over Christmas.
• Six to nine months: most long-haul journeys in their main season, especially if you have particular places to stay in mind or are travelling as a family in the school holidays.
• Three to six months: shoulder-season trips, flexible dates, destinations with plenty of good options.
• Under three months: possible, particularly out of season and if you're flexible about where you stay, but you'll be choosing from what's left.

Anchor first

Once you know what's scarce, the order becomes obvious. Secure the thing that can't be substituted first – the permit, the camp, the particular boat or that one room overlooking the garden – and only then build everything else around it: flights, transfers, the more flexible stays.

A common mistake is to work the other way round: book flights because they look good, then find the permits for those days have gone. The journey then has to be rebuilt, and sometimes the very thing it was designed around is lost.

Flexibility is the strongest card you hold. If you can move by a week or two, places that seemed full often open up. If your dates are fixed, it helps to be flexible about places instead: a different camp in the same ecosystem, a neighbouring town in the same valley.

The view from Lithuania

Planning from Lithuania, the clock often starts earlier than it seems. Leave usually has to be agreed well in advance, and if you want to escape the dark months of November to February for somewhere warm, the decision is best made in summer or early autumn – especially if the trip includes Christmas or New Year. For summer trips with children, the same applies to spring: school holidays overlap across much of Europe, so demand for popular destinations rises everywhere at once.

With long-haul flights connecting through European hubs, it helps not only to book early but to route sensibly: a connection with enough time, sometimes a night on the way. That, too, is easier to arrange with time in hand.

And if it's already late?

Not at all. Late planning works best for those who change the shape of the trip rather than the wish to travel. Shoulder season is often less a compromise than a gift: fewer people, softer light, easier availability. Destinations with plenty of good places to stay – Portugal, Sri Lanka, Vietnam – usually adapt more easily to shorter notice. And if the dream was gorillas at the shortest possible notice, it may be worth keeping it for next year and going somewhere else this time, rather than doing it by halves.

The reverse holds too: planning early doesn't mean deciding everything at once. Securing the anchor and a rough outline is enough; the details can ripen slowly, along with the anticipation.

Tell us when you could travel and what matters most to you on the journey. First, we listen. Then, we explore what's possible.