| Prestwick to Oerlinghausen | 593.85 mi (955.71 km) |
| Prestwick to Oestrich-Winkel | 648.45 mi (1,043.57 km) |
| Prestwick to Offenburg | 719.83 mi (1,158.46 km) |
| Prestwick to Oftersheim | 696.85 mi (1,121.46 km) |
| Prestwick to Ohrdruf | 710.79 mi (1,143.90 km) |
| Prestwick to Ohringen | 735.40 mi (1,183.50 km) |
| Prestwick to Olbernhau | 813.14 mi (1,308.62 km) |
| Prestwick to Olching | 843.18 mi (1,356.97 km) |
| Prestwick to Oldenburg | 540.98 mi (870.63 km) |
| Prestwick to Oldenburg in Holstein | 619.93 mi (997.67 km) |
| Prestwick to Olfen | 555.82 mi (894.50 km) |
| Prestwick to Olpe | 599.13 mi (964.21 km) |
| Prestwick to Olsberg | 609.27 mi (980.53 km) |
| Prestwick to Oranienburg | 744.88 mi (1,198.77 km) |
| Prestwick to Ortenberg | 669.30 mi (1,077.14 km) |
