| Ontario to Mancha Real | 5,914.56 mi (9,518.57 km) |
| Ontario to Manilva | 5,908.15 mi (9,508.24 km) |
| Ontario to Manises | 5,964.80 mi (9,599.42 km) |
| Ontario to Manlleu | 5,950.29 mi (9,576.07 km) |
| Ontario to Manresa | 5,946.50 mi (9,569.97 km) |
| Ontario to Manzanares | 5,869.96 mi (9,446.79 km) |
| Ontario to Manzanares el Real | 5,772.68 mi (9,290.22 km) |
| Ontario to Maracena | 5,940.07 mi (9,559.62 km) |
| Ontario to Marbella | 5,917.88 mi (9,523.91 km) |
| Ontario to Marchena | 5,859.14 mi (9,429.37 km) |
| Ontario to Marin | 5,505.53 mi (8,860.30 km) |
| Ontario to Marratxi | 6,081.34 mi (9,786.97 km) |
| Ontario to Martorell | 5,962.31 mi (9,595.42 km) |
| Ontario to Martos | 5,902.98 mi (9,499.92 km) |
| Ontario to Masamagrell | 5,965.47 mi (9,600.49 km) |
