| Estoril to Oerlinghausen | 1,261.85 mi (2,030.76 km) |
| Estoril to Oestrich-Winkel | 1,155.83 mi (1,860.12 km) |
| Estoril to Offenburg | 1,094.47 mi (1,761.37 km) |
| Estoril to Oftersheim | 1,152.83 mi (1,855.30 km) |
| Estoril to Ohrdruf | 1,287.45 mi (2,071.96 km) |
| Estoril to Ohringen | 1,181.66 mi (1,901.69 km) |
| Estoril to Olbernhau | 1,379.89 mi (2,220.72 km) |
| Estoril to Olching | 1,222.83 mi (1,967.96 km) |
| Estoril to Oldenburg | 1,301.16 mi (2,094.01 km) |
| Estoril to Oldenburg in Holstein | 1,435.77 mi (2,310.65 km) |
| Estoril to Olfen | 1,208.96 mi (1,945.63 km) |
| Estoril to Olpe | 1,192.61 mi (1,919.32 km) |
| Estoril to Olsberg | 1,228.98 mi (1,977.85 km) |
| Estoril to Oranienburg | 1,449.61 mi (2,332.92 km) |
| Estoril to Ortenberg | 1,208.15 mi (1,944.32 km) |
