| Ontario to Norwich | 5,414.08 mi (8,713.12 km) |
| Ontario to Nottingham | 5,322.61 mi (8,565.92 km) |
| Ontario to Nuneaton | 5,331.72 mi (8,580.58 km) |
| Ontario to Oadby | 5,340.86 mi (8,595.29 km) |
| Ontario to Oakengates | 5,292.47 mi (8,517.40 km) |
| Ontario to Oakham | 5,348.54 mi (8,607.65 km) |
| Ontario to Oldbury | 5,314.90 mi (8,553.50 km) |
| Ontario to Oldham | 5,265.74 mi (8,474.39 km) |
| Ontario to Ollerton | 5,315.66 mi (8,554.73 km) |
| Ontario to Olton | 5,324.66 mi (8,569.22 km) |
| Ontario to Omagh | 5,055.64 mi (8,136.26 km) |
| Ontario to Ormesby | 5,250.35 mi (8,449.63 km) |
| Ontario to Ormskirk | 5,240.33 mi (8,433.50 km) |
| Ontario to Orpington | 5,434.13 mi (8,745.38 km) |
| Ontario to Ossett | 5,276.65 mi (8,491.94 km) |
