| Ottawa Guadalupe | Central Time | 01:00 |
| Ottawa Bağcılar | Turkey Time | -08:00 |
| Ottawa Sulaymaniyah | Arabian Time | -08:00 |
| Ottawa Cúcuta | Colombia Time | 00:00 |
| Ottawa Moradabad | India Standard Time | -10:30 |
| Ottawa N'Djamena | West Africa Time | -06:00 |
| Ottawa Langfang | China Time | -13:00 |
| Ottawa Zhumadian | China Time | -13:00 |
| Ottawa Yantai | China Time | -13:00 |
| Ottawa Lviv | Eastern European Time | -07:00 |
| Ottawa Merida | Central Time | 01:00 |
| Ottawa Tlalnepantla | Central Time | 01:00 |
| Ottawa Edmonton | Mountain Time | 02:00 |
| Ottawa Jeonju-si | Korean Time | -14:00 |
| Ottawa Zhuzhou | China Time | -13:00 |
| Ottawa Subang Jaya | Malaysia Time | -13:00 |
| Ottawa Bhiwandi | India Standard Time | -10:30 |
| Ottawa Pekanbaru | Western Indonesia Time | -12:00 |
| Ottawa Seville | Central European Time | -06:00 |
| Ottawa Tolyatti | Samara Time | -09:00 |
| Ottawa Jaboatão | Brasilia Time | -02:00 |
| Ottawa Shizuoka | Japan Time | -14:00 |
| Ottawa Santo Domingo Oeste | Atlantic Time | -01:00 |
| Ottawa Rajshahi | Bangladesh Time | -11:00 |
| Ottawa City of Balikpapan | Central Indonesia Time | -13:00 |
| Ottawa Changzhi | China Time | -13:00 |
| Ottawa Bulawayo | Central Africa Time | -07:00 |
| Ottawa Zagreb | Central European Time | -06:00 |
| Ottawa Agadir | Western European Time | -06:00 |
| Ottawa Sarajevo | Central European Time | -06:00 |
| Ottawa La Plata | Argentina Time | -02:00 |
| Ottawa Tunis | Central European Time | -06:00 |
| Ottawa Zhangjiakou | China Time | -13:00 |
| Ottawa Zigong | China Time | -13:00 |
| Ottawa Fuxin | China Time | -13:00 |
| Ottawa Enugu | West Africa Time | -06:00 |
| Ottawa Tangier | Western European Time | -06:00 |
| Ottawa Huangshi | China Time | -13:00 |
| Ottawa Liaoyang | China Time | -13:00 |
| Ottawa Sheffield | United Kingdom Time | -05:00 |
| Ottawa Seattle | Pacific Time | 03:00 |
| Ottawa Denver | Mountain Time | 02:00 |
| Ottawa El Paso | Mountain Time | 02:00 |
| Ottawa Kumamoto | Japan Time | -14:00 |
| Ottawa Raipur | India Standard Time | -10:30 |
| Ottawa General Santos | Philippine Time | -13:00 |
| Ottawa Dushanbe | Tajikistan Time | -10:00 |
| Ottawa Osasco | Brasilia Time | -02:00 |
| Ottawa San Luis Potosi | Central Time | 01:00 |
| Ottawa Detroit | Eastern Time | 00:00 |