June and September, on either side of the August crowds, when the yachts fill Porto Cervo and the sea is at its warmest. No partner house sits on the Costa Smeralda, so we place you in its landmark hotels and private villas above Porto Cervo and Romazzino, with a tender and helicopter on call.

October to December is the best window. Mandarin Oriental, Four Seasons, Ritz-Carlton, St. Regis, Shangri-La and JW Marriott all operate here.

February to April is the driest stretch. Mandarin Oriental, Four Seasons, Ritz-Carlton, St. Regis, Shangri-La and JW Marriott all operate here.

April to May and late September to November. Four Seasons Seoul, Park Hyatt Seoul and Busan, and two JW Marriotts in the capital are partner properties.

January to May is the drier half. None of our hotel partners operates here, so we place Brunei inside a wider Borneo routing rather than on its own.

April to June and September to mid-December are the value windows. Four Seasons at Hualalai, Maui and Lanai, and the Ritz-Carlton Maui, are partners.

May to October is the dry season. Six Senses Fiji on Malolo is the partner property; beyond it this is a private-island market.

April to May and October to November are the calmest months. Six Senses Zil Pasyon, Four Seasons Seychelles and Anantara Maia are all partner properties.

May to October is the dry season. Four Seasons Resort Bora Bora and the St. Regis Bora Bora Resort are the partner properties, both on their own motu.

November to March. Jumeirah, One&Only, Four Seasons, Mandarin Oriental, Park Hyatt, Ritz-Carlton and St. Regis all operate across Dubai and Abu Dhabi.

November to March. Mandarin Oriental, Four Seasons, Ritz-Carlton, St. Regis, Shangri-La and Anantara all operate in Doha, so choice is never the problem.

April to June and September to October. Six Senses Douro Valley, Four Seasons Hotel Ritz Lisbon and Anantara Vilamoura are partner properties.

May, June, September and early October. Four Seasons Astir Palace Athens, Amanzoe at Porto Heli and Mandarin Oriental Costa Navarino are partners.

May, June, September and October. Mandarin Oriental Ritz Madrid, Rosewood Villa Magna, Four Seasons Madrid and Six Senses Ibiza are all partners.

December to April, with the New Year fleet off Gustavia. Rosewood Le Guanahani is our partner property, on its own peninsula at Grand Cul-de-Sac.

October to April for the long dry summer, September for the flowers. One&Only Cape Town sits on the Waterfront and is our partner property in the city.

June to October for the river crossings, January and February for calving in the south. Four Seasons Safari Lodge Serengeti is the partner property in the park.

December to March for snow, July and August for the high country. Four Seasons Resort Vail, Ritz-Carlton Bachelor Gulch and the St. Regis Aspen are partners.

May, June and September, either side of the heat. Mandarin Oriental Lago di Como on the water, with Park Hyatt Milano or Four Seasons Milano for the city night.

Late March to April for blossom, November for maples, January for Hokkaido powder. Aman, Park Hyatt, Four Seasons, Mandarin Oriental and Ritz-Carlton all operate here.

December to March for the Southern Alps in summer, June to September for the snow. Park Hyatt Auckland is the partner property at either end of the trip.

November to March, with late February and March the quietest. Mandarin Oriental Santiago and Park Hyatt Buenos Aires cover the gateway nights either side.

Whole-island buyouts in the British Virgin Islands. December to April is the reliable window. No partner hotel here; the island itself is the property.

Late May for the Grand Prix, late September for the Yacht Show. Our nearest partner property is the Grand-Hotel du Cap-Ferrat, A Four Seasons Hotel.

May, June and September for the light and the harvest. Four Seasons Firenze, St. Regis Florence, Rosewood Castiglion del Bosco and COMO Castello Del Nero.

March to May and late September to November for clear Himalayan air. Six Senses Bhutan and Aman's Amankora each run five lodges across the valleys.

December to March for snow, June to September for the high passes. Mandarin Oriental Palace Luzern, Park Hyatt Zurich and Four Seasons Geneva are partners.

November to April for flat water and dry skies. One&Only Reethi Rah, Six Senses Laamu and COMO Cocoa Island are all OUIJETS preferred partners.