Association of Independent Tour Operators
A trade association that also happens to offer holiday ideas from the 160 members featured on its website.
http://www.aito.co.uk/
http://www.aitoagents.com/
http://www.aitoskiholidays.co.uk/

ATO
South African tour operator with over 30 years experience arranging tours worldwide.
http://www.ato.co.za/

Cheap Holiday Deals.co.uk
Searches multiple tour operators to bring you the best package holiday deals.
http://www.cheapshortbreaks.co.uk/
http://www.cheapholidaydeals.co.uk/
http://www.henoo.com/

Costco
Book cruises, car hire, accommodation and vacations to international destinations.
http://www.costco.com/

Federation of Tour Operators
The FTO aims to promote the benefits of air inclusive holidays. Members include some very well known tour operators.
http://www.fto.co.uk/

Find Tour Operators
Puts over 10,000 unique tours and 1,300 American tour operators at your fingertips.
http://www.find-tour-operators.com/

First Choice
Leading European leisure travel company.
http://www.firstchoiceholidaysplc.com/firstchoice/

Fresh Holidays
A comparison service that searches the websites of budget carriers and tour operators to bring you the best flight, hotel and package holiday deals.
http://www.freshholidays.com/

Group Voyagers, Inc.
A family run company, established in 1928, that encompasses such famous travel industry names as Cosmos Tourama, Avro, Monarch Airlines, Archers Direct and Cosmos.
http://www.globusandcosmos.com/

Henoo
Lets you compare holidays from the top tour operators in the UK and Ireland, and book with them direct.
http://www.henoo.com/

JMC
Book your holiday online with JMC.
http://www.holidays.jmc.com/

Kuoni
Dream holidays from a Swiss purveyor with an international presence.
http://www.kuoni.com/

Liberty Travel
Full-service agent with over 50 years experience behind it and outlets nationwide.
http://www.libertytravel.com/

MyTravel
The homepage of Airtours.
http://www.mytravelgroup.com/

MyTravel Canada
Bag a package holiday, flight or last minute bargain online.
http://www.mytravel.ca/

Specialty Travel Index
Lists over 500 tour operators worldwide offering thousands of adventure travel options.
http://www.specialtytravel.com/

The International Ecotourism Society
Contains a directory of travel agents and tour operators, accommodation, transport and other eco-travel services.
http://www.ecotourism.org/

Thomas Cook
The second largest leisure group in Europe and the third largest in the world. Just click on the English language link for more information.
http://cms.thomascookag.com/

Thomson Holidays
One of the UK's biggest and best known tour operators.
http://www.thomson-holidays.com/

Trek America
A small group adventure travel operator with a year-round programme covering the USA, Canada, Alaska, Mexico and 11 countries throughout Central and South America.
http://www.trekamerica.com/

United States Tour Operators Association
On this site you will find tips and guidelines to help you plan your vacation, information on tour operator members, their destinations and products, as well as links to many of their websites.
http://www.ustoa.com/

VFB Holidays
Award-winning British tour operator specialising in holidays to France.
http://www.vfbholidays.co.uk

Which?
A customer satisfaction survey of over 70 leading British tour operators carried out by the country's leading consumer rights organization. The document is in PDF format.
http://www.which.co.uk/holidaywhich/tourops/touroptable.pdf

Which?
Links to the websites of major UK tour operators.
http://www.which.net/holidaywhich/links/jan05/tour_operators0105.html

World of TUI
World of TUI is the master brand of Preussag, a giant German travel firm that owns such leading names as Austravel, Britannia Airways, Lunn Poly and Thomson Holidays in the UK alone.
http://www.world-of-tui.com/en/
http://www.tui.com/

World Wildlife Fund
The WWF's Membership Travel Program takes you to the far reaches of the globe to see spectacular wildlife in their natural setting.
http://www.worldwildlife.org/travel/