| Ottawa Ciudad Juarez | Mountain Time | 02:00 |
| Ottawa Manhattan | Eastern Time | 00:00 |
| Ottawa Asuncion | Paraguay Time | -02:00 |
| Ottawa Recife | Brasilia Time | -02:00 |
| Ottawa Daejeon | Korean Time | -14:00 |
| Ottawa San Antonio | Central Time | 01:00 |
| Ottawa Kumasi | Greenwich Mean Time | -05:00 |
| Ottawa Kota Bharu | Malaysia Time | -13:00 |
| Ottawa Kyoto | Japan Time | -14:00 |
| Ottawa Kuala Lumpur | Malaysia Time | -13:00 |
| Ottawa Karaj | Iran Time | -08:30 |
| Ottawa Kathmandu | Nepal Time | -10:45 |
| Ottawa Palembang | Western Indonesia Time | -12:00 |
| Ottawa Multan | Pakistan Time | -10:00 |
| Ottawa Tirunelveli | India Standard Time | -10:30 |
| Ottawa Hanoi | Indochina Time | -12:00 |
| Ottawa Kharkiv | Eastern European Time | -07:00 |
| Ottawa Agra | India Standard Time | -10:30 |
| Ottawa Córdoba | Argentina Time | -02:00 |
| Ottawa Tabriz | Iran Time | -08:30 |
| Ottawa Novosibirsk | Novosibirsk Time | -12:00 |
| Ottawa Gwangju | Korean Time | -14:00 |
| Ottawa Bursa | Turkey Time | -08:00 |
| Ottawa Vadodara | India Standard Time | -10:30 |
| Ottawa Belém | Brasilia Time | -02:00 |
| Ottawa Fushun | China Time | -13:00 |
| Ottawa Quito | Ecuador Time | 00:00 |
| Ottawa San Diego | Pacific Time | 03:00 |
| Ottawa Fukuoka | Japan Time | -14:00 |
| Ottawa Antananarivo | East Africa Time | -08:00 |
| Ottawa Luoyang | China Time | -13:00 |
| Ottawa Hyderabad | Pakistan Time | -10:00 |
| Ottawa Borough of Bronx | Eastern Time | 00:00 |
| Ottawa Valencia | Venezuela Time | -01:00 |
| Ottawa Gujranwala | Pakistan Time | -10:00 |
| Ottawa Barranquilla | Colombia Time | 00:00 |
| Ottawa Guankou | China Time | -13:00 |
| Ottawa Tijuana | Pacific Time | 03:00 |
| Ottawa Lubumbashi | Central Africa Time | -07:00 |
| Ottawa Porto Alegre | Brasilia Time | -02:00 |
| Ottawa Tangerang | Western Indonesia Time | -12:00 |
| Ottawa Santa Cruz | Bolivia Time | -01:00 |
| Ottawa Handan | China Time | -13:00 |
| Ottawa Kampala | East Africa Time | -08:00 |
| Ottawa Yekaterinburg | Yekaterinburg Time | -10:00 |
| Ottawa Khulna | Bangladesh Time | -11:00 |
| Ottawa Douala | West Africa Time | -06:00 |
| Ottawa Gorakhpur | India Standard Time | -10:30 |
| Ottawa Mecca | Arabian Time | -08:00 |
| Ottawa Makassar | Central Indonesia Time | -13:00 |