50 Degrees North Nordic AS

Aarya Village Travel

Academic Travel Abroad (ATA)

ACCOR

Acorn Tourism Consulting Ltd

Active Travel Group

Actuality Abroad

Adventura

Adventure Cafe

Adventure Tours U.K. Ltd (trading as Adventure Tours UK)

Adventurous Ewe Ltd

AITO The Specialist Travel Association

AJL Consulting GmbH

Alianza Mesoamericana de Ecoturismo

Allibert Trekking

AM+A Marketing and Media Relations

AMADI

Amazonas Explorer

Amplia Mundo

ANIMONDIAL

ANVR - Dutch Association of Travel Agents and Tour Operators

APAVT ASSOCIAÇÃO PORTUGUESA DAS AGENCIAS DE VIAGENS E TURISMO

Apumayo expediciones Peru

Archean Africa Safaris

ASI Reisen

Asian Ecotourism Network

Asociación Cultural El Camino del Santo Grial

Associação Dark Sky/ Dark Sky Association

Association of Finnish Travel Industry SMAL

AST

Asuaire Travel

Australian Walking Company

Autoridad de Turismo de Panamá. ATP

Aves Argentinas

Ayala Land Hotels and Resorts (AHRC)

B Tourism

Back Track Bothies

Badrallach Campsite, Cottage and Bothy

Barbados Tourism Marketing Inc.

Batu Batu Resort

Bay Gardens Resorts

BehaviorSMART

Better Places

BIG Adventures Pvt. Ltd.

Bilbao Convention Bureau

Blackstone Valley Tourism Council Inc / Sustainable Tourism Laboratory

Blank Canvas

Blue Sail Consulting Ltd

Bog & Thunder

Boogie's Solidarity

Booking Holdings Inc.

Bucuti & Tara Beach Resort, Aruba

Butterfield & Robinson

Byway

Cairngorms Business Partnership

Cairngorms National Park Authority

Carey Tourism

Caribbean Tourism Organization (CTO)

Caribbean Travel Network NV

CAS Trips

Casal dei Fichi

CED - World Centre of Excellence for Destinations

Celebi Garden Hotel

Center for Responsible Travel (CREST)

Centre of Expertise Leisure, Tourism & Hospitality (CELTH)

CEPA GmbH / CEPA Foundation

Chameleon Strategies

China Outbound Tourism Research Institute (COTRI)

Chumbe Island Coral Park Ltd

Cinque Terre Riviera

Click Book Stay Ltd

ClimateKuul.com

ClimateTrade

Common Seas

Comptoir des Voyages

Comrie Croft

Comunidade Intermunicipal da Região de Coimbra

COMUNITUR - Comunidad de turismo para el Desarrollo

Condé Nast

Confederación Española de Organizaciones Empresariales (CEOE )

Conference of Peripheral Maritime Regions - CPMR

Connecting Peru

Considerate Group

Contiki

Corée Voyage

Creative Travel

CREES MANU

Cross River State Government

Cuidadores de Destinos

Culinary Tourism Alliance

Culture Tour

CYPRUS SUSTAINABLE TOURISM INITIATIVE -CSTI-

Dallas Fort Worth International Airport (DFW)

deSter

Destination Diagnostics

Destination Livingstone

Destination Mekong

Destination Orkney Ltd.

Destination Québec cité (DQc)

Destination Stewardship Center

Destination Vancouver

DESTINATURE - Agência para o Desenvolvimento do Turismo de Natureza

Deutsche Bahn AG

Distinct Destinations Private Limited

DMO Djerba

DMO Djerba

Dorset Climate Action Network

Dreamcatcher South Africa NPC

DRV German Travel Association

Earth Changers

Earth Rhythms Inc.

Earthtones

EASIA TRAVEL

Echidna Walkabout Nature Tours, Australia

Ecobnb

EcoGo

Ecole Travel

ecollective

Ecolodges Indonesia

ECONOTUR

Ecosphere

Ecotourism Development Association (EDA)

ECOTRANS

Eda Frandsen Sailing Ltd

EdenGate Travel

EL Domo Private Limited

El Rio Foundation

EplerWood International

Equality in Tourism International

Esprit

Eternal Africa Safari

Eternal Landscapes

Ethical Travel Portal

ETHNOGRAPHIC ART PRIVATE LIMITED

Europa Mundo Vacaciones S.L.U.

EUROPA MUNDO VACACIONES, S.L.U.

European Sustainable Hospitality Group

European Tourism Association AISBL (ETOA)

European Travel Agents' and Tours Operators' Association - ECTAA

Evaneos

E-Voyages Ltd

EXA Group Destination Marketing Organization

EXO Travel

Exodus Travels

Expedia Group

Experience Travel Group Ltd

Explora

Explore Worldwide

Extollo Adventures

Fair Trade Tourism

FairAway Travel

Fairbnb.coop

FEDERACION EMPRESARIA HOTELERA GASTRONOMICA DE LA REP. ARGENTINA - FEHGRA

Federated States of Micronesia

Ferrocarrils de la Generalitat de Catalunya, FGC

Ferry View Campsite

Flooglebinder

Folka Holidays Pvt Ltd

ForestFriends

Forever Cornwall Limited

forum anders reisen e.V. (FAR)

Freedom Adventure

Fto - Federazione Turismo Organizzato

FUNDACIÓN ECOLOGISTA VERDE

Fundación Panameña de Turismo Sostenible (APTSO)

Future of Tourism Coalition

G Adventures

Gamper Smith Associates ltd

GENUINE SPAIN

GEORGIAN HOLIDAYS LLC

Gilchrist & Gray

Glasgow Life - Tourism

Global Destination Sustainability Movement

Global Ecotourism Network

Global Family Travels

Global Sustainable Tourism Council (GSTC)

Glorious Himalaya Trekking Pvt. Ltd.

GLP Films

Good Travel Guide

Göteborg & Co

Govindamangalam Homestay

Great Himalaya Trail

Green Cross France et Territoires

Green Destinations NGO

Green Getaways Australia

Green Globe

Green Tourism

Green Visions

Greengage Solutions

GreenInitiative

GREEnN Dreams

GreenStep Solutions Inc.

Greentraveller Limited

Greenview

GTI Tourism Pty Ltd

GUAVA Amenities

HAIRES GROUP

Haka Educational Tours

Haka Tours Limited

Hållbar - Julia THIBAULT

Happy Trails! Asia

Harford Bridge Holiday Park

Healing Hotels of the World

Hearts in the Ice

Heathery Heights

Here To Travel

Heritage Holiday Safaris Ltd

Hermitage Bay

Higher Pendeen Camping

Himalayan Dreams

Himalayan Ecotourism

Holiday Extras

Hope Farm Retreats

Hostelling International

Hotelplan Group (Hotelplan Management AG)

Iberostar Group

Iceland Tourism Cluster

Immerse India Tours Private Limited

Impact Travel Collective

ImpacTrip

IN2DESTINATION RESEARCH AND CONSULTANCY IN TOURISM SL

Indian Ocean Tourism Organization

Indus Experiences

Inghams

Inkaterra

Innoreg sagl

Innovation Norway

Inntravel

Inside Travel Group

Inspired Adventures

Inspiresport

Institute for Sustainable Developmmet, Environment and Tourism

Intercultural Outreach Innitiative (IOI)

International Institute of Gastronomy, Culture, Arts and Tourism

International Volunteer HQ (IVHQ)

Intrepid Travel

INTRO Travel

Island Smart Ltd.

Island Spirit

ISON Travel

Jade Mountain Resort

JARTA　Japan Alliance of Responsible Travel Agencies

Jaya House River Park Hotel

JH Climate Action Collective

Joro Experiences

Journey Latin America

Jus' Sail Ltd.

Just a Drop

Kagumu Adventures

KAI SUSTAINABLE COACHING S DE RL DE CV

Kasbah du Toubkal

KATE - Ecology & Development

KE Adventure Travel

KENYA COAST TOURIST ASSOCIATION

Kind Traveler

Kindle Journeys

Kingfisher Journeys

KITRO SA

Kuoda Travel

La Mano Del Mono

Lakesong Kumarakom

Lamington Group

Lamphope

Legacy Vacation Resorts (LVR)

Liberty International Tourism Group

LightBlue Consulting

Linking Tourism and Conservation (LT&C)

Little Gwendreath Holiday Cottages

Live Life Travel, LLC

London & Partners

Los Cauquenes Resort & Spa & Experiences

MACEDONIA TRAVEL

MaCher

MADA FOCUS SARLU

Magical Colombia

MakGeopark

Mantra Experiences LLP

Mapa-Mundi

Marbella

Mariposario Jardin Magico

mascontour GmbH

MEET Network

Megaworld Hotels and Resort Inc. - Savoy Hotel Manila

Millennium Destinations

Minar Travels (India) Private Limited

MIRABILIA NETWORK

Mistakidis Tours

Monitoring Center for Sustainable Tourism Observatory Universitas Sumatera Utara

Mood of Finland Oy

Moonlit Sanctuary Wildlife Conservation Park

Morton Golf Holidays

Mountain Homestays

Much Better Adventures

Mujeres En Turismo Chile

Municipalidad Distrital de Machupicchu

My Green Butler

myclimate

Nanda Journeys

NATH, Inc.

National Blacks in Travel and Tourism Collaborative

Nepal Inside Out Treks & Tours

Netherlands Board of Tourism & Conventions (NBTC)

Network of European Regions for Sustainable and Competitive Tourism (NECSTouR)

New Forest Escapes

Niarra Travel

Nineteen Twenties Safari Camps ltd

Niseko Town Hall

NOAH ReGen (Network of Ocean Ambasadors Headquarters - ReGeneration)

Nomad lodges

Nomade Aventure

Nordic Ways

Nordiva Tours AS

Norie Quintos Media and Consulting

North Devon UNESCO World Biosphere Reserve

Not Your Average American, LLC

NotOnMap

Nuno Nobre Consulting

Old Barn Tregonetha

Oluokos Signature

OMM INN

One Branded

Onesixth Expedtions

Onward Group Travel Services, Inc., dba Onward

Oregon Coast Visitors Association

Organisation of Eastern Caribbean States (OECS)

Outlook Expeditions

Overseas Adventure Travel

Oy Kon-Tiki Tours Ltd. / Kon-Tiki Finland

Pacific Asia Travel Association (PATA)

Pacific Tourism Organisation

Panoramic Journeys Ltd

Peruvian Association, Adventure and Ecotourism Tourism - APTAE

Placemark Solutions, Inc

Plan21 Foundation

Planet Happiness

Planeterra

Positive Impact Forever

Pousada Serra Verde

Preverisk Group

Projects Abroad

Proyecto Sustentable

Pura Aventura

Rainforest Cruises

RARE

Real Rome Tours

Reclaim Your Self Retreats

Red rocks initiative for sustainable development

Regional association of local self-government bodies «TRANSCARPATHIA IS FOR A CLEAN ENVIRONMENT»

Reho Travel

ResiTravel

Respond On Demand Ltd

Responsible Adventures

Responsible Tourism Institute

Responsible Travel

Rethink2gether

RHP Ltd

Ribban Beach Camp

RISE Travel Institute

Rooted

Rosetta Reizen

Rowing The World

Royal Mountain Travel

Rumbo a Picos - Escuela de Naturaleza SL

Rural Organisation For Social Elevation (ROSE)

Russa Garcia & Asociados

Saddle Skedaddle

Salt and Bush Eco Tours

Şanlıurfa Tourism Development İNC ŞTGŞ

Santa's Lapland

SARL Les Templiers (Pyrenean Odysseys)

Saudi Green Building Forum (SGBF)

Say Hueque Journeys

School of Economics and Business, University of Ljubljana (SEBLU)

Selective Asia

Senderos (UK) Ltd

Services for Tourism ltd

Settled Nomads Inc.

SevenTravel

Seychelles Sustainable Tourism Foundation

shantitravel.com

Shunyoso Cultural Asset Preservation Society

Side Note Scc

Skal International

Skyscanner

Slowfolk Travel

Slowfolk Travel

Small Planet Consulting Inc SPC

Socially Responsible Safaris

socialtours

Society for Sustainable Tourism - SST

Solimar International

Sondor Travel

Soul of India

South American Travel Services

Spain Natural Travel

Spenceley Tourism And Development (STAND) Ltd

Spicers Retreats Hotels and Lodges

St. Olav Waterway

STA Consultores

StarWays Eco-Conncious Study & Travel

StayLuxe Properties, Inc

STC Expeditions

Steppes Travel

Stichting Merk Fryslân

STOKE

Stone Horse Expeditions and Travel LLC

Student Horizons

Sublime Trails Pvt. ltd

Sun-hat Villas & Resorts

Sunsai Nature

SUNx Malta

SUP Bristol

Sustainable First

Sustainable Hospitality Alliance

Sustainable Tourism and Responsible Travel Lab

Sustainable Tourism International Ltd.

Sustainable Travel & Tourism Agenda- STTA Kenya

Sustainable Travel International

Sustentur

SW Associates, LLC - Sustainable Destination Development

Swedish trails

Tanzania Association of Tour Operators (TATO)

Tasigo Hotels Eskişehir

Tasmanian Walking Company

Tech360 Mobility, LLC

Teleportravel

Terra Lu Travel & Consult GmbH

TerraVerde Sustainability

Terres d'Aventure

The Adventure Connection

The African Tourism Council

The Bioasis

The Blue Yonder

The Caribbean Hotel & Tourism Associaiton

The Cayuga Collection of Sustainable Luxury Hotels and Lodges

The Conscious Travel Foundation

The Evolved Traveler

The Happy Prize Company

The Long Run

The Midcounties Co-operative

The Mountain Company

The Nordic Tourism Collective

The PC Agency

The Reef-World Foundation

The Safari Series

The Transformational Travel Council (TTC)

The Travel Corporation (TTC)

The Travel Development Company

The Wilderness Group

Three Hares Carriage- Whealphoenix Ltd

Three Tree Hill

Tiger Mountain Pokhara Lodge

Tilted Map

TLC Health Travel Ltd/ TLC Harmony

Tomorrow's Tourism

TOUR MALIN MADAGASCAR - MADAVOYAGES

Tour Operators Society of Kenya

Toureasy

Tourisk Inc.,  Sustainable Destinations

Tourism Allies

Tourism Authority of Kiribati

Tourism Cares

TOURISM GENERIS

Tourism Optimizer Platform (TOP)

Tourism Vancouver Island

Tourisme Durable Québec

TouristEd Chile

TourRadar

TrainingAid

Travalyst Limited

Travel Begins at 40

Travel Corporation India Ltd (TCI, Sita, DF)

Travel Differently

Travel Horns

Travel Matters & Make Travel Matter

Travel World Escape Tour Operator

Traveleco

Travelindex Ltd

Travelling de Luxe

Travelling Whale

TravelLocal / Trip.me

Travindy España

Travotel

Tripseed

True Adventure

True Adventure Europe

Trufflepig Travel Inc.

TTG Media

Turama Pacific Travel Group

Turisme de Barcelona

Turismo de Portugal

Turismo Integral

Turismo Reset, profesionales del turismo por la regeneración del sector (#TurismoRESET)

Turismo Y Conservación T&C

Turizm ve Destinasyon Geliştirme Derneği - TDGD  (Tourism and Destination Development Association)

Two Rock Outdoor

UCC WHALE Center Inc.  Blue Community Consortium

UDYAMA

UIAA International Climbing and Mountaineering Federation

Union of International Mountain Leader Associations (UIMLA)

Universidad Abierta Interamericana (UAI)

University of Maribor, Faculty of Tourism

Uniworld Boutique River Cruises

Unmissable England

Utopia Africa

UXUA CASA HOTEL & SPA

Vamos Expeditions

Vector Travel

Vedettes de Paris

Vegan Travel Asia by VegVoyages

Venezia Autentica S.R.L.S.

Vertex Holiday

Via Mondo Enterprises, LLC

Viare Travel

VILLA IN THE VINEYARD

Visit Gloucestershire

Visit Inverness Loch Ness

Visit Moray Speyside (VMS)

Visit València

VisitScotland

Voyageurs du Monde

Vraman Holidays Pvt. Ltd.

West Sweden Tourist Board

WeWantGroups.com

Whatley Manor

Wild Dog Design

Wild Frontiers

Wilderness Patagonia - Travel Company

Women in Travel cic

World Adventures Ltd

World Challenge

World Expeditions Travel Group

World Heritage Catalysis

World Leisure Organization (WLO)

World Trails Network (WTN)

World Travel & Tourism Council (WTTC)

YellowWood Adventures Limited

ZARA INTERNATIONAL TRAVEL AGENCY LIMITED