Anything over about nine hours is worth breaking. On most Gulf and Asian routings the stopover version costs less than flying straight through — which is the single most useful thing we can tell you.
A rough rule that saves a lot of disappointment: one night on the ground for every hour in the air, minimum.
Ten hours to the Maldives justifies ten nights. Thirteen to Japan justifies at least twelve. Twenty-two to Australia needs three weeks — two means four days in transit and one city, which is why we'd honestly suggest going to Asia instead if that's all the time you have. The other half of the rule is the stopover: you're changing planes anyway, so getting off for three nights turns dead time into a destination, and the fare difference is often nil or negative.
With honest flight times and the minimum stay we'd recommend.
11 hours total, split into two. The classic stopover argument.

11h 30m, and the cheapest country to be in once you land.
12 hours out, then short internal hops all the way south.
11h 30m and almost no jet lag — one or two hours' difference.
13 hours, broken on the way home rather than the way out.
22 hours each way, split into three legs. Three weeks minimum.
9 hours direct, and the easiest long-haul with children.
8h 30m direct, English-speaking, driving on the left. The gentlest long-haul.
9 hours with one stop, and worth every minute of it.
Roughly one night per hour of flying. Ten hours, ten nights. Less than that and you spend a large share of the holiday adjusting.
Often, yes — and we price both so you can see it rather than take our word for it. It's the clearest argument there is for using an agent.
The Caribbean or South Africa. Both are direct, English-speaking, drive on the left, and have little or no time difference.
Yes, and we'll tell you honestly where the upgrade is worth it and where the money is better spent on the hotel.
Anything over nine hours needs ten nights or a stopover to be worth it.

Two coasts with opposite seasons, so there's always a right one.

Split it between Ubud and the coast. One base is a wasted trip.

Tokyo, Kyoto and the shinkansen between them. No wasted days.

North to south, three internal flights, and the best food in Asia.
Same time zone, so no jet lag. The best-value long-haul we sell.
Mara and Serengeti as one ecosystem, timed to the migration.
Guide prices, per person, based on two sharing, including return flights, accommodation and transfers where stated. They indicate what a holiday of this type has typically cost and are not an offer or a quotation. Your price depends on dates, party, board basis, departure airport and availability, and is confirmed in writing before any payment is taken.
No forms with twenty fields. Send us the rough shape and we'll come back within one working day with real options and real prices.