| Seia to March | 915.05 mi (1,472.63 km) |
| Seia to Margate | 872.90 mi (1,404.80 km) |
| Seia to Market Drayton | 896.63 mi (1,442.99 km) |
| Seia to Market Harborough | 892.36 mi (1,436.12 km) |
| Seia to Marlow | 837.95 mi (1,348.54 km) |
| Seia to Marple | 934.46 mi (1,503.87 km) |
| Seia to Marton | 1,020.30 mi (1,642.02 km) |
| Seia to Maryport | 1,006.25 mi (1,619.41 km) |
| Seia to Matlock | 924.84 mi (1,488.38 km) |
| Seia to Melksham | 801.84 mi (1,290.43 km) |
| Seia to Meltham | 950.01 mi (1,528.90 km) |
| Seia to Melton Mowbray | 911.23 mi (1,466.48 km) |
| Seia to Merthyr Tudful | 808.82 mi (1,301.67 km) |
| Seia to Methil | 1,109.48 mi (1,785.53 km) |
| Seia to Mexborough | 951.95 mi (1,532.02 km) |
