| Abbreviation | Definition |
|---|---|
| IMTD | Indian Medical Tourism Destination |
| IMTM | International Mediterranean Tourism Market |
| INSTO | International Network of Sustainable Tourism Observatories |
| IOS | Irish OverSeas |
| IPTE | International Premium Travel Experience |
| IQT | Individual Quest Tours |
| IRCTC | Indian Railway Catering and Tourism Corporatio |
| IRCTC | Indian Railway Catering and Tourism Corporation |
| IRCTC | Indian Railways Catering and Tourism Corporation |
| IRCTC | Indian Railways Catering Tourism Cooperation |
| IRTI | Idaho Recreation and Tourism Initiative |
| IRTP | International Religious Tourism and Pilgrimage |
| IRTS | International Recommendations for Tourism Statistics |
| ISRTC | Indian Railway Catering and Tourism Corporation |
| IST | International Students Tours |
| ISTM | International Society Of Travel Medicine |
| ISTM | Irish Society Of Travel Medicine |
| ISTN | Internet Serbia Travel News |
| ITAC | Indigenous Tourism Association of Canada |
| ITAO | In The Area Of |