| Ottawa Matola | Central Africa Time | -06:00 |
| Ottawa Culiacán Rosales | Mexican Pacific Time | 03:00 |
| Ottawa Zaragoza | Central European Time | -06:00 |
| Ottawa Gorakhpur | India Standard Time | -09:30 |
| Ottawa Xiangtan | China Time | -12:00 |
| Ottawa Ipoh | Malaysia Time | -12:00 |
| Ottawa Mississauga | Eastern Time | 00:00 |
| Ottawa Boston | Eastern Time | 00:00 |
| Ottawa Puyang Chengguanzhen | China Time | -12:00 |
| Ottawa Nantong | China Time | -12:00 |
| Ottawa Mudanjiang | China Time | -12:00 |
| Ottawa Athens | Eastern European Time | -07:00 |
| Ottawa Santo André | Brasilia Time | -01:00 |
| Ottawa Nouakchott | Greenwich Mean Time | -04:00 |
| Ottawa Pointe-Noire | West Africa Time | -05:00 |
| Ottawa Aguascalientes | Central Time | 02:00 |
| Ottawa Memphis | Central Time | 01:00 |
| Ottawa Kryvyi Rih | Eastern European Time | -07:00 |
| Ottawa Acapulco | Central Time | 02:00 |
| Ottawa João Pessoa | Brasilia Time | -01:00 |
| Ottawa Ansan-si | Korean Time | -13:00 |
| Ottawa Benghazi | Eastern European Time | -06:00 |
| Ottawa Frankfurt | Central European Time | -06:00 |
| Ottawa Krasnodar | Moscow Time | -07:00 |
| Ottawa Guilin | China Time | -12:00 |
| Ottawa Palermo | Central European Time | -06:00 |
| Ottawa Colombo | India Standard Time | -09:30 |
| Ottawa Lilongwe | Central Africa Time | -06:00 |
| Ottawa Oran | Central European Time | -05:00 |
| Ottawa Diyarbakir | Turkey Time | -07:00 |
| Ottawa Taguig | Philippine Time | -12:00 |
| Ottawa New South Memphis | Central Time | 01:00 |
| Ottawa Ulyanovsk | Ulyanovsk Time | -08:00 |
| Ottawa Kotli | Pakistan Time | -09:00 |
| Ottawa Okayama | Japan Time | -13:00 |
| Ottawa Zhanjiang | China Time | -10:00 |
| Ottawa Ahmadi | Arabian Time | -07:00 |
| Ottawa Yogyakarta | Western Indonesia Time | -11:00 |
| Ottawa North York | Eastern Time | 00:00 |
| Ottawa Chișinău | Eastern European Time | -07:00 |
| Ottawa Wrocław | Central European Time | -06:00 |
| Ottawa Cheongju-si | Korean Time | -13:00 |
| Ottawa Anyang-si | Korean Time | -13:00 |
| Ottawa Tebessa | Central European Time | -05:00 |
| Ottawa Zhenjiang | China Time | -12:00 |
| Ottawa Portland | Pacific Time | 03:00 |
| Ottawa Winnipeg | Central Time | 01:00 |
| Ottawa Andong | China Time | -12:00 |
| Ottawa Oklahoma City | Central Time | 01:00 |
| Ottawa Izhevsk | Samara Time | -08:00 |