- IB-Tours International
 - Specialises in travel to Morocco, Portugal, and Spain. - Iberian Adventures
- Offers outdoor activities including walking, hiking, cycling, and mountain tours throughout Spain.
- Iberocycycle
- Offers cycling trips in Spain along the Cantabrian Coast and the Picos de Europa.
- Ibex Expeditions
- Offers wildlife, trekking, camping, mountaineering, eco, and photo tours.
- Ibex Treks
- Hiking and mountain biking tours through the Bernesse Oberland region of the Swiss Alps.
- Iceland Adventure
- Offering a wide range of fixed and custom itineraries including driving and horseback tours in Iceland.
- Iceland Experience Tours
- Providers of independent and escorted tour programmes to Iceland. Adventure travel experts providing packages that can include expedition cruises, flights, hotels, and car rentals.
- Iceland Express
- Designed for visitors who wish to learn about and experience Iceland in a short period of time.
- ICES Sports
- Provides personalised travel and promotions services for football, golf, rowing, and educational tours.
- ICTexplorer
- Offers business travel incorporating seminars in information technology with travel packages to Cebu in Philippines, South Africa, Argentina, and Spain.
- Idaho Afloat
- Offers white water river rafting trips on the Salmon or Snake Rivers.
- Idaho Angling Services
- Flyfishing guide services for eastern and south central Idaho and all of New Zealand.
- Idaho Outdoor Experience
- Offers day, overnight, and multiday backpacking and horseback riding trips in Idaho.
- Idaho Outfitters and Guides Association (IOGA)
- Offer a variety of outdoor adventures such as guided hunting, fishing, river rafting, boating, guest ranch trips, and more.
- Idaho Whitewater Connection
- Offers guided and chartered whitewater rafting on the Snake, Salmon, and Selway rivers.
- Idaho Whitewater Rafting
- Offers multiday trips in Idaho on the rivers Main Salmon, Owyhee, Jarbidge, and Bruneau. Includes rafting, hiking, biking, and ranch-stay combinations.
- Idaho Whitewater Unlimited
- Offers guided whitewater trips on Idaho's Payette River, and sells related gear and equipment.
- Idaho Wilderness Company
- Guided rafting, kayaking, or paddle boating down the Salmon River. Also offers hunting and fishing trips.
- Ideal Holidays
- Offers a number of golf tours and eco-oriented packages to Borneo.
- Idlewind Expeditions
- Offers travel aboard 65 foot teakwood yachts to explore the scenic Mediterranean coast of Turkey.
- iExplore
- Destination guide for adventure travellers with a focus on ecotourism, experiential trips, and related products, information, and services.
- Iglu.com
- Offers a variety of skiing holidays, including last minute deals. Also features resort information, daily snow reports, travel advice, ski tips, and more.
- IGLUSki
- Offers ski holidays and chalets in France, Austria, Andorra, Bulgaria, Italy, Switzerland, USA, and Canada.
- iGuideClub
- Directory of outdoor, fishing, and hunting guides. Browse or make reservations with professional guides.
- Ik Chin Travel Service
- Travel agency conducting inbound and outbound tours from Sarawak, Malaysia.
- Illinois Railway Museum
- Museum in motion. Find information about tourist train operations as well as museum hours.
- Ilulissat Tourist Service
- Dog-sled, boat, helicopter and hiking tours in the Disko Bay region of Greenland.
- Imaginative Traveller, The
- Adventure tours for the adventure-minded people. Trips to Egypt, Jordan, Turkey, India, Europe, and beyond.
- imaGo Turkey
- Offers tours focused on culture, arts, spiritual, and more. Also serves the lesbian and gay community.
- Immanuel Tours Agencies Ltd.
- Specialising in Christian pilgrimage tours to Israel, Egypt, and Jordan.
- Immersia Travel
- Worldwide adventures for ages 50 and up.
- Immersive Art Tours of Florence
- Participants visit museums and artisan workshops of this renaissance city.
- Imperial River Company
- Lodge and restaurant. Also offers guided rafting trips on the Deschutes River.
- Imperial Tours
- Offers luxury tours throughout China.
- Imphofu Hunting Safaris
- Operates in the bushveld in the North West Province of South Africa. Offers a 10-day create your own safari option, as well as references.
- Impulse 62
- Offers private cruises through the Caribbean.
- In The Hills Fishing Excursions
- Provides guided fly fishing excursions on the Blanco, Guadalupe, Llano, Pedernales and San Marcos Rivers. Customised excursions for beginners or expert anglers.
- Inala
- Guided nature tours of Bruny Island.
- Inca Adventures
- Offers hiking in the Peruvian Andes. Trek the Inca Trail to Machu Picchu. Explore sacred sites, ruins, and Inca architecture in Cuzco.
- Incredible Adventures
- Fly MiGs, experience zero-gravity, and explore the Tunisian Sahara.
- Incredible Adventures
- Adventure camping trips to Yosemite National Park, Lake Tahoe and more.
- Independent Mountain Ski/Snowboard Holidays in the Alps
- Independent Mountain provides specialised ski holidays in France. Browse a detailed list of catered and self-catered chalets and apartments of all sizes that will meet any group requirements.
- Independent Tourist
- Provides packaged self-guided tours cycling inn to inn in Missouri, Wisconsin, and Prince Edward Island, Canada, with luggage transfers included.
- INdepth Travel
- Offers cultural immersion tours of Buenos Aires for people who want a historical and current perspective of the city.
- India Center, The
- Provides information on India, its culture, people, art, fairs, and festivals. Also features Indian tour packages like cultural tours, Buddhism tours, adventure tours, and wildlife tours.
- India Cultural Tours
- Offers spiritual, heritage, wildlife, leisure, cultural, and meditation tours in India.
- India Holiday Online
- Delhi-based tour operators conducting tours in India. Features Kerala, spa, hill station, wildlife, cultural, and honeymoon tours.
- India International Voyages
- Offers adventure, cultural, historical, wildlife, and eco tours from India to Sri Lanka and Nepal.
- India Nepal Travel Centre
- Offers trekking trips to India, Nepal, Bhutan, and Tibet.
- India Perfect Holidays
- Tour operators in India catering to the travel needs of the travellers in India including air ticketing, rail ticket booking, hotel booking, and car rentals.
- India Rajasthan Travel Network
- Offers packaged trips to India including visits to parks and sancturies.
- India Tourguide
- Offers cultural, wildlife, river rafting, temple, and other packaged trips to India.
- India Tourism
- Bangalore-based tour operators organising tours in India that include hill stations, beaches, and wildlife. Also conducts industrial tour, study tours, and student excursions.
- India Tours N Travel
- Offering travel and tourism services in India, tour packages and travel itineraries for all Indian tourist destinations.
- India Travel
- Delhi-based tour operators organising tours that include North India packages, Taj Mahal packages, Vaishnodevi yatra, Shiridi tours, and train tours.
- India Travel Club
- Offers trekking, safari, wildlife, and sightseeing trips all over India.
- India Travel Guide
- Features tourist destinations and customised tours to India.
- India Travel Services
- Inbound travel and tourism agency offers information on tourism in Indian states and cities, heritage tours, and hotel information.
- India-Goa
- Tour operators specialised in tours within and around India. Features Goa in specific along with Kerala, Mumbai, and Gujarat tours.
- Indian Beach Holidays
- Provides information, holiday packages, and booking details about various beach destinations across India.
- Indian Country Tourism
- Experience the people, culture, places, and history of indigenous America.
- Indian Head Canoes & Rafts
- Offers day trips on the Delaware River.
- Indian Head Charters
- Large mouth bass and striper fishing on the Potomac River.
- Indian Luxury Tours
- Offers luxury tours to India featuring train tours, hotels, resorts, beach tours, spa and ayurveda tours, and wildlife tours.
- Indian Wildlife
- Features national park, sanctuaries, and tour packages.
- Indian Wildlife Adventure
- Indian wildlife tour operators featuring wildlife resorts, safari, national parks, adventure sport, and beaches.
- Indian Wildlife Tour
- Provides a complete information on wildlife in India and offers wildlife and tiger safari tours. Includes facilities such as hotel and flight bookings, transport, as well as itinerary planning. Site features contact and reservation details.
- Indiana Expedition
- Guided treks to Machu Picchu, Cuzco, and the Inca trail in small groups with a maximum of six people. Combines home stays, camping, horseback riding, hiking, and rafting.
- IndiaOnlineTravel.com
- Offering package tour bookings, as well as hotel and air reservations. Includes information on pilgrimage destinations.
- Indicator Birding
- Birding tours, guiding, information, and eco-tourism development in Gauteng and eastern South Africa.
- Indo-Asia Tours
- Offers tours to India, Nepal, Bhutan, Tibet, and Sri Lanka.
- Indo-Nepal Holidays
- Provides trekking and expedition tours for pilgrimage of Mt. Kailash and Mansarovar in Nepal.
- Indovision Tours
- Offers Buddhist pilgrimages, trekking, cultural, wildlife, adventure, and train journeys.
- Indula Safaris and Tours
- Offers wildlife safaris to the Kruger National Park, Victoria Falls, Swaziland, and more.
- Indulgence Yacht Charters
- Offering Sunseeker yacht charters for corporate hospitality or personal pleasure within the River Thames, Solent, or Poole Harbour areas.
- Indus Travels
- Offers small group journeys and private tours of destinations in Asia, Africa, and South America.
- Inertia Tours
- College spring break travel specialist offering trips to South Padre Island, Cancun, Mazatlan, Puerto Vallarta, Acapulco, Panama City Beach, and Negril.
- InfoHub Architecture Tours
- Find a wide selection of travel packages of architecture tours from InfoHub.com.
- Ingatours
- Offering European garden tours hand tailored for smaller groups.
- Inghams Travel
- Offers online booking for ski holidays to resorts in Europe and North America.
- INKA Expeditions
- Offers guided trekking expeditions to Acongagua and other mountains in the Andean range.
- Inka's Archaeological Tours
- Archaeology, ecology, and adventure tours to destinations including the Amazon, Machu Picchu, Lake Titicaca, and the Galapagos.
- Inka's Empire Tours
- Offering a variety of tours to South America.
- Inner Faith Travel
- Specialising in group tours to the Middle East.
- Inner Gorge Trail Guides
- Offers inclusive, guided trips to the Grand Canyon for all levels of experience.
- Inner Maldives
- Arranges resort and hotel accommodations. Organises holiday packages for sailing, scuba diving, surfing, and a variety of cruises.
- Inntravel
- Provides walking, cycling, horse riding, city breaks, and winter holidays across Europe.
- Insar Tours & Travel
- Offers inbound tours within Sarawak and Sabah that include accommodation in longhouses, river safaris, and tours of the native flora and fauna.
- Inside Passage Charters
- Provides custom adventure, ecotour, and photographic safaris in Southeast Alaska.
- Inside Passages
- Offers kayak journeys in Southeast Alaska. Combines wilderness journey, meditation practice, and engaged conversation, drawing upon Buddhist and Judeo-Christian contemplative practices to forge a closer link between inner and outer wilderness exploration.
- InsideJapan Tours
- Japan holiday specialist offering small group tours, self-guided trips, and fully tailored packages.
- Insider Wine Tours
- Specialises in wine and wine tasting tours to Italy and France.
- Insight France
- Offers painting, drawing, and sightseeing holidays around Le Touquet in northern France.
- Insight Travel
- Pilgrimages to India and Nepal.
- Insight Travel
- Offering private tours within Turkey with a speciality in cultural, biblical, and photographic tours.
- Insight Vacations
- Premier escorted tours by motorcoach throughout Britain, Ireland, Europe, U.S. Scandinavia, Eastern Mediterranean, and North America.
- InspirAsians Cooking School Vacations
- Offers culinary trips to southern China. Packages include villa accommodations and cooking instruction.
- Inspiration Tours & Travel
- For Himalayan regions including Nepal, Sikkim/Darjeeling, Bhutan, and Tibet. Offers cultural, nature, and study tours.
- Instinct
- Offers tour packages exploring the Incan Trail, the Andes Mountains, and the Tambopata River.
- Intense Peru
- Travel agency and tour operator offering holiday packages and private tours in Peru.
- Inter-Campus Online
- Offers spring break tours in the U.S. and Mexico.
- Interasia Tours
- Provides a range of guided and self-paced tours. Specialises in China and Vietnam. Best viewed in Internet Explorer.
- Intercultural Performance Contact (IPC)
- Offers cultural tours to Mexico, interactive Spanish classes, and travel study courses to Mexico in partnership with the University of Calgary.
- Interior Alaska Adventures
- Trips include fishing, rafting, glacier hiking, and more.
- Interior Whitewater Expeditions
- Offers trips down the whitewater on the Adams, Clearwater, Babine, and Skeena Rivers and North Thompson.
- Interisland Travel & Tours
- Offers day trips, flightseeing tours, and business travel planning.
- Interlake China Tours
- Specialising in private and small group tours customised to individual specifications, as well as package tours and Yangtze River cruises.
- Intermedes
- Specialising in cultural tours; designing special tours for groups of art lovers.
- International Adventure
- Providing your passport to international hunting in exotic locations such as Argentina, North Africa, Cuba, Chile, Mexico and Russia.
- International Amateur Athletic and Cultural Program
- Personalised sport tours for junior high and high school football, volleyball, and basketball teams in Italy.
- International Art Club, The
- Organisers of fully escorted sketching holidays to the south of France and Spain.
- International Business Travel
- Operates tours within Peru and South America.
- International Divers, Inc.
- Enjoy a dolphin encounter off the Florida coast.
- International Expeditions
- Specialises in travel programmes to natural history destinations.
- International Group Ministries (IGM) Tours
- Customised tours of the Holy Land, Egypt, Turkey, and Greece for church and parish ministries and academic groups.
- International Kitchen
- Offering culinary tours to France and Italy that provide cooking lessons, wine tours, and more.
- International Marketing & Travel Concepts (IMTC)
- Destination management company that creates and operates Eastern European tours and provides travel arrangements.
- International Mountain Guides
- Leading mountaineering, climbing, and trekking expeditions worldwide including Everest, Cho Oyu, Kilimanjaro, the Alps, and more.
- International Nature & Cultural Adventures (INCA)
- Small group adventures in the Galapagos Islands, Peru, Turkey, and Antarctica.
- International Society for Paranormal Research
- Forming a cohesive bond worldwide between Parapsychologists and others in the field of paranormal research.
- International Student Tours
- Specialises in student group packages for high school graduation and college spring break.
- International Tour Center
- Offers a variety of tour packages and customised trips and arranges visas, flights, and domestic travel within China.
- International Travel and Dating Service
- Offers tours to Russia and Ukraine for single men to meet single women.
- International Travel and Tour Consultants
- Specialising in Holy Land tours, choir tours, trips to Europe, and cruises.
- International Ventures, Ltd.
- Offers safaris in Africa and Indian Ocean islands.
- International Wildlife Adventures
- Offers tours led by photographers and naturalists to destinations in Canada, Alaska, South America, Costa Rica, and more.
- International Yacht Charter Group
- Features a wide selection of international luxury yacht charters, motor yachts, and sailing yacht charters.
- International Yacht Club
- Offers details of sailing in and around Marmaris in Turkey, as well as information on the yachts offered for bareboat charter.
- International Zoological Expeditions
- Specialising in student and other group travel.
- Interpac Yachts, Inc.
- Licensed charter agent for private yacht holidays worldwide.
- Intertours
- Organising tours within Serbia and abroad. Also in Serbian.
- Intimate Excursions
- Private luxury charters departing from the Great South Bay, Long Island.
- Into Africa
- Offers self-driven golf tours and Southern African safaris.
- Into France
- Book holidays to France including city hotels, Disneyland Paris, short breaks, and cottage accommodation, plus flights and French travel information.
- Into Tanzania
- Offers safaris in Tanzania. Also features a destination guide for the country.
- Into The West Tours
- Private tour company specialising in riding tours to Ireland, with an emphasis on building strong cross country skills, and personalised instruction.
- into-Breaks
- Offers city breaks, channel crossings, hotels, holidays, and an option to join a money-saving travel club.
- Intourist (2)
- Intrav (3)
- Intrepid Travel
- Offers small group adventure travel in Asia, Egypt, and beyond.
- Inward Bound
- Dedicated to world travel while enjoying a Jewish experience.
- Inward Bound Adventures
- Global adventures in personal renewal. Holistic fitness retreats including yoga, meditation, NIA, and pilates.
- Iran Gasht Tour
- Provides cultural, hunting, athletic, historical, and nomad tours across Iran. Also offers visa processing services.
- Iran Markaz
- Arranges general and special interest tours to Iran including desert and nature treks, diving, hunting, mountaineering, and skiing.
- Iran Paradise Tour Operator
- Offers tour packages for groups and individuals to various parts of the Middle East. Itineraries include pilgrimages, nomads, eco-tourism, visa processing, and more.
- Iran Safari
- Specialises in hunting and photo safaris. Hunting trips include the Persian Ibex, four species of wild sheep, wild boar, birds, and gazelle.
- Iran Trip Tour and Travel Agency
- Offering a range of itineraries including historical and cultural tours, adventure tours, pilgrimages, and combination tours.
- Ireland Behind the Scenes
- Owner-escorted, luxury journeys featuring exclusive invitations, five star accommodations, decorative arts, gourmet dining, golfing, and insight into the private elite world of hidden Ireland.
- Ireland Classic Coaches
- Luxury charter services.
- Ireland Escorted
- Offering customised guided tours of Ireland for small and large groups.
- Ireland Pub Tours
- Lynott Tours offers pub visits and an escorted tour of Ireland.
- Irene Yacht Charters
- Classic sailing ship available for charter in the Caribbean.
- Irian Diving
- Diving centre with camping grounds and tours.
- Iriqui Excursions
- Offers 4WD, camel trekking or hiking adventures in the Moroccan desert.
- Irish City Tours
- Offers tours of Dublin, Kilkenny, Wicklow, and Glendalough, the north and south coasts, and more.
- Irish Cycling Safaris
- Provides accommodation, bicycle hire, guide, and luggage van.
- Irish Voyageurs
- Offers the opportunity to get close to nature on a guided activity holiday in a traditional war canoe, touring and camping waterways throughout Ireland.
- Irish Ways
- Offers guided and independent hiking and walking all over Ireland.
- IrishTourism.com
- Offers accommodations, flights, ferries, car rentals, golf holidays, escorted coach tours, and more.
- Iron Donkey
- Offers self-guided and custom group tours for experienced cyclists in Ireland, England, Wales, and Italy.
- Isaan Discovery Travel (IDT)
- Specialises in tailor-made themed holidays in Northeastern part of Thailand.
- Íshestar
- Horse riding tours that explore the Icelandic highlands and countryside.
- Island Adventures
- Tour operator offering packages to Mauritius that include accommodations and sea kayaking or diving as well as incentive packages for groups.
- Island Adventures
- Offers whale watching and wildlife tours in the San Juan Islands.
- Island Adventures
- Tour operator offering packages to Mauritius that include accommodations and sea kayaking or diving as well as incentive packages for groups.
- Island Coast Boat Tours Inc.
- Offers whale-watching boat tours in the Bay of Fundy.
- Island Dreams Tours & Travel
- Specialises in world-wide scuba diving, snorkeling, and watersport adventures.
- Island Hopper Vacations
- Hotels, tours, and holiday packages in Western Samoa, Niue, and Cook Islands.
- Island Inn
- Offering accommodation and dogsledding excursions over frozen Lake Superior.
- Island Marine
- Maui dinner, sailing, and snorkel and scuba yacht cruises.
- Island Marine Activities
- Information on watersports and whalewatching in Lahaina, Hawaii.
- Island Quest Vacations
- Offers competitive adventure games in the Caribbean, on land or at sea.
- Island Rendezvous
- Offers boat tours to the island, where you can experience life in Newfoundland as it was before the days of Resettlement.
- Island Travels
- Offers airfare promos and travel and tour packages in Bohol, Boracay, Cebu, Palawan, and Davao in the Philippines and other Asian destinations.
- Island Wave
- Arranges surfing tours to Bali, East Java, Lombok, Sumbawa, Mentawi Island, and Sumatera.
- Island Yachts
- Offers bareboat and crewed charter yachts for your custom designed sailing holiday.
- Island-Safari.com
- Offers African safaris to Okavango and Luangwa and tropical island beach holidays.
- Israel Revealed
- Latter Day Saints tours conducted by Daniel Rona.
- Israel Tour Connection (ITC)
- Specialising in Bar/Bat Mitzvah tours.
- Israel Travel Company
- Specialising in off the beaten track travel experiences in Israel.
- IsraelDeal.com
- Specialising in tours of Israel for individual clientele and for groups. Book hotel accommodations, a variety of tours, and many other activities in the holy land.
- Isram World of Travel
- Offers tours to worldwide destinations including Mediterranean, Europe, Orient, and Latin America. Also provides Jewish heritage tours.
- It's All Latin: Colombia Tours
- Latin American tour operator offering a variety of tours to Colombia.
- Italia Tours
- Offers tours and excursions to Venice, Rome, Milan, Vatican City, and Florence.
- Italian Compass, The
- Unique culinary adventures to Italy. The Italian Compass provides cooking holidays to explore the food and wines of Tuscany, Umbria, Sicily, and Puglia.
- Italian Connection
- Specialises in small group walking, culinary, and cultural tours of Italy.
- Italian Cookery Course at Casa Ombuto
- Offers cooking holidays with accommodation in a villa with heated pool.
- Italian Cooking Holidays
- Tour packages and guidebook, by Margaret Cowen.
- Italiatour!
- Offers a variety of packages to Italy.
- Italy Cooking Vacations
- Offering culinary holidays in Italy.
- Italy Dance Tour
- Enjoy the beautiful Italian Riviera by dancing, touring, and exploring with the tour leader and dance instructor George Nicol.
- Ivory Photo Safaris
- Offering safari modules covering Kenya, Tanzania, and the Seychelles.
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