| IATA | I Am The Avalanche 
| Others |
| IATA | Ice Age Trail Alliance
| Others |
| IATA | Idaho Agricultural Teachers Association
| Others |
| IATA | Illinois Art Therapy Association
| Others |
| IATA | Illinois Athletic Trainers Association
| Others |
| IATA | Indiana Athletic Trainers Association
| Others |
| IATA | Integrated Approach on Testing and Assessment
| Others |
| IATA | Integrated Approaches to Testing and Assessment
| Others |
| IATA | Intel Ultra Ata
| Others |
| IATA | Intelligent Agents For Telecommunication Applications
| Others |
| IATA | International Advanced Training Association
| Others |
| IATA | International Air Traffic Association
| Others |
| IATA | International Air Transport Association
| Organization, Trade Union, Transport, Air Transport |
| IATA | International Airlines Travel Agents
| Others |
| IATA | International Amateur Theatre Association
| Others |
| IATA | International Association of Travel Agents
| Others |
| IATA | International Auto Trade Association
| Others |
| IATA | International Aviation and Travel Academy
| Others |
| IATA | International Aviation Transport Association
| Others |
| IATA | Iraq Automobile and Touring Association
| Others |