| Ottawa Saint Margrethen | Central European Time | -06:00 |
| Ottawa Hotchkiss | Mountain Time | 02:00 |
| Ottawa San Ramon | Central Time | 02:00 |
| Ottawa Toshima | Japan Time | -13:00 |
| Ottawa Wolverton | United Kingdom Time | -05:00 |
| Ottawa Howrah | India Standard Time | -09:30 |
| Ottawa Costa Teguise | Western European Time | -05:00 |
| Ottawa Torreglia | Central European Time | -06:00 |
| Ottawa Saint Clairsville | Eastern Time | 00:00 |
| Ottawa Howell | Eastern Time | 00:00 |
| Ottawa Sanasana | Fiji Time | -16:00 |
| Ottawa Toronto | Eastern Time | 00:00 |
| Ottawa Woodbridge | Eastern Time | 00:00 |
| Ottawa Hoylake | United Kingdom Time | -05:00 |
| Ottawa San Vito al Tagliamento | Central European Time | -06:00 |
| Ottawa Torquay | Eastern Australia Time | -14:00 |
| Ottawa Saint-Émilion | Central European Time | -06:00 |
| Ottawa Hoxie | Central Time | 01:00 |
| Ottawa San Vito Lo Capo | Central European Time | -06:00 |
| Ottawa Torelló | Central European Time | -06:00 |
| Ottawa Woodbridge Township | Eastern Time | 00:00 |
| Ottawa Halli | Eastern European Time | -07:00 |
| Ottawa Searsport | Eastern Time | 00:00 |
| Ottawa Torazo | Central European Time | -06:00 |
| Ottawa Saint-Denis-de-l'Hôtel | Central European Time | -06:00 |
| Ottawa Hallsville | Central Time | 01:00 |
| Ottawa Sandy Bay | Eastern Australia Time | -14:00 |
| Ottawa Topanga | Pacific Time | 03:00 |
| Ottawa Woodcroft | Central Australia Time | -13:30 |
| Ottawa Half Moon Bay | Pacific Time | 03:00 |
| Ottawa Sancerre | Central European Time | -06:00 |
| Ottawa Törökbálint | Central European Time | -06:00 |
| Ottawa Saint Davids | United Kingdom Time | -05:00 |
| Ottawa Hallam | Eastern Australia Time | -14:00 |
| Ottawa Sand City | Pacific Time | 03:00 |
| Ottawa Toowong | Eastern Australia Time | -14:00 |
| Ottawa Saint Croix Falls | Central Time | 01:00 |
| Ottawa Halifax | Eastern Time | 00:00 |
| Ottawa Sandgate | Eastern Australia Time | -14:00 |
| Ottawa Toppenish | Pacific Time | 03:00 |
| Ottawa Saint Francis | Central Time | 01:00 |
| Ottawa Hamburg | Central European Time | -06:00 |
| Ottawa Seekonk | Eastern Time | 00:00 |
| Ottawa Topsham | United Kingdom Time | -05:00 |
| Ottawa Saint Georg | Central European Time | -06:00 |
| Ottawa Halton Hills | Eastern Time | 00:00 |
| Ottawa Seeley's Bay | Eastern Time | 00:00 |
| Ottawa Taylors Hill | Eastern Australia Time | -14:00 |
| Ottawa Saint George | Eastern Australia Time | -14:00 |
| Ottawa Haleiwa | Hawaii-Aleutian Time | 06:00 |