| Skiathos Ifran | Western European Time | 02:00 |
| Skiathos Idlib | Eastern European Time | 00:00 |
| Skiathos Idukki Township | India Standard Time | -03:30 |
| Skiathos Idyllwild-Pine Cove | Pacific Time | 10:00 |
| Skiathos Ichikawa | Japan Time | -07:00 |
| Skiathos Idar | India Standard Time | -03:30 |
| Skiathos Idalia | Eastern Australia Time | -08:00 |
| Skiathos Illueca | Central European Time | 01:00 |
| Skiathos Ilavala Hobli | India Standard Time | -03:30 |
| Skiathos Ileret | East Africa Time | -01:00 |
| Skiathos Iligan City | Philippine Time | -06:00 |
| Skiathos Ilford | United Kingdom Time | 02:00 |
| Skiathos Ilfracombe | United Kingdom Time | 02:00 |
| Skiathos Ikšķile | Eastern European Time | 00:00 |
| Skiathos Humboldt | Central Time | 08:00 |
| Skiathos Hunter River | Atlantic Time | 06:00 |
| Skiathos Hulshout | Central European Time | 01:00 |
| Skiathos Hultsfred | Central European Time | 01:00 |
| Skiathos Hulu Langat | Malaysia Time | -06:00 |
| Skiathos Huixquilucan de Degollado | Central Time | 08:00 |
| Skiathos Hudson | Eastern Time | 07:00 |
| Skiathos Hudson Oaks | Central Time | 08:00 |
| Skiathos Hubali-Dharwad | India Standard Time | -03:30 |
| Skiathos Huez | Central European Time | 01:00 |
| Skiathos Hudsonville | Eastern Time | 07:00 |
| Skiathos Huehuetoca | Central Time | 08:00 |
| Skiathos Hyde Park | Eastern Australia Time | -08:00 |
| Skiathos Hyderabad | India Standard Time | -03:30 |
| Skiathos Hyderabad | India Standard Time | -03:30 |
| Skiathos Hyderabad | India Standard Time | -03:30 |
| Skiathos Hyderabad | India Standard Time | -03:30 |
| Skiathos Huntingdale | Western Australia Time | -06:00 |
| Skiathos Huttons Ambo | United Kingdom Time | 02:00 |
| Skiathos Huskisson | Eastern Australia Time | -09:00 |
| Skiathos Húsavík | Greenwich Mean Time | 02:00 |
| Skiathos Husborne Crawley | United Kingdom Time | 02:00 |
| Skiathos Hurstville | Eastern Australia Time | -09:00 |
| Skiathos Hurricane | Mountain Time | 09:00 |