| Calheta to Oerlinghausen | 1,853.80 mi (2,983.40 km) |
| Calheta to Oestrich-Winkel | 1,752.83 mi (2,820.91 km) |
| Calheta to Offenburg | 1,694.06 mi (2,726.33 km) |
| Calheta to Oftersheim | 1,751.61 mi (2,818.94 km) |
| Calheta to Ohrdruf | 1,885.15 mi (3,033.86 km) |
| Calheta to Ohringen | 1,781.13 mi (2,866.45 km) |
| Calheta to Olbernhau | 1,979.26 mi (3,185.31 km) |
| Calheta to Olching | 1,822.55 mi (2,933.12 km) |
| Calheta to Oldenburg | 1,887.50 mi (3,037.64 km) |
| Calheta to Oldenburg in Holstein | 2,022.71 mi (3,255.24 km) |
| Calheta to Olfen | 1,799.48 mi (2,895.98 km) |
| Calheta to Olpe | 1,786.47 mi (2,875.05 km) |
| Calheta to Olsberg | 1,822.75 mi (2,933.43 km) |
| Calheta to Oranienburg | 2,045.07 mi (3,291.22 km) |
| Calheta to Ortenberg | 1,805.39 mi (2,905.50 km) |
