| Swansea to Mirfield | 4,072.52 mi (6,554.08 km) |
| Swansea to Mitcham | 4,198.11 mi (6,756.21 km) |
| Swansea to Mold | 4,032.47 mi (6,489.64 km) |
| Swansea to Molesey | 4,189.94 mi (6,743.06 km) |
| Swansea to Monkseaton | 4,042.93 mi (6,506.47 km) |
| Swansea to Monmouth | 4,086.45 mi (6,576.50 km) |
| Swansea to Montrose | 3,962.47 mi (6,376.98 km) |
| Swansea to Morden | 4,196.43 mi (6,753.50 km) |
| Swansea to Morecambe | 4,017.57 mi (6,465.66 km) |
| Swansea to Moreton | 4,026.85 mi (6,480.59 km) |
| Swansea to Morley | 4,073.81 mi (6,556.16 km) |
| Swansea to Morpeth | 4,031.10 mi (6,487.43 km) |
| Swansea to Morriston | 4,042.97 mi (6,506.53 km) |
| Swansea to Mosbrough | 4,094.88 mi (6,590.08 km) |
| Swansea to Mossley | 4,064.10 mi (6,540.53 km) |
