| Olhao to Colchester | 1,112.06 mi (1,789.68 km) |
| Olhao to Coleford | 1,051.56 mi (1,692.32 km) |
| Olhao to Colne | 1,193.85 mi (1,921.31 km) |
| Olhao to Colwyn Bay | 1,141.21 mi (1,836.60 km) |
| Olhao to Congleton | 1,147.25 mi (1,846.32 km) |
| Olhao to Conisbrough | 1,180.18 mi (1,899.32 km) |
| Olhao to Connahs Quay | 1,142.16 mi (1,838.13 km) |
| Olhao to Consett | 1,263.79 mi (2,033.88 km) |
| Olhao to Conwy | 1,139.46 mi (1,833.79 km) |
| Olhao to Cookstown | 1,218.60 mi (1,961.14 km) |
| Olhao to Corby | 1,122.92 mi (1,807.16 km) |
| Olhao to Corfe Mullen | 992.11 mi (1,596.65 km) |
| Olhao to Corsham | 1,033.34 mi (1,663.01 km) |
| Olhao to Coseley | 1,108.26 mi (1,783.57 km) |
| Olhao to Cosham | 1,011.33 mi (1,627.57 km) |
