| Sintra to Mitcham | 978.53 mi (1,574.79 km) |
| Sintra to Mold | 1,036.10 mi (1,667.44 km) |
| Sintra to Molesey | 973.92 mi (1,567.37 km) |
| Sintra to Monkseaton | 1,181.26 mi (1,901.05 km) |
| Sintra to Monmouth | 954.59 mi (1,536.26 km) |
| Sintra to Montrose | 1,276.90 mi (2,054.98 km) |
| Sintra to Morden | 977.61 mi (1,573.32 km) |
| Sintra to Morecambe | 1,098.86 mi (1,768.45 km) |
| Sintra to Moreton | 1,051.74 mi (1,692.62 km) |
| Sintra to Morley | 1,096.25 mi (1,764.24 km) |
| Sintra to Morpeth | 1,185.99 mi (1,908.66 km) |
| Sintra to Morriston | 926.96 mi (1,491.80 km) |
| Sintra to Mosbrough | 1,073.25 mi (1,727.22 km) |
| Sintra to Mossley | 1,074.48 mi (1,729.20 km) |
| Sintra to Moston | 1,072.32 mi (1,725.74 km) |
