| Nafplio to Oerlinghausen | 1,208.03 mi (1,944.14 km) |
| Nafplio to Oestrich-Winkel | 1,128.50 mi (1,816.14 km) |
| Nafplio to Offenburg | 1,060.00 mi (1,705.91 km) |
| Nafplio to Oftersheim | 1,079.52 mi (1,737.33 km) |
| Nafplio to Ohrdruf | 1,090.91 mi (1,755.66 km) |
| Nafplio to Ohringen | 1,041.88 mi (1,676.74 km) |
| Nafplio to Olbernhau | 1,017.76 mi (1,637.92 km) |
| Nafplio to Olching | 934.75 mi (1,504.33 km) |
| Nafplio to Oldenburg | 1,282.92 mi (2,064.67 km) |
| Nafplio to Oldenburg in Holstein | 1,286.15 mi (2,069.85 km) |
| Nafplio to Olfen | 1,231.68 mi (1,982.20 km) |
| Nafplio to Olpe | 1,183.32 mi (1,904.37 km) |
| Nafplio to Olsberg | 1,181.01 mi (1,900.65 km) |
| Nafplio to Oranienburg | 1,145.79 mi (1,843.97 km) |
| Nafplio to Ortenberg | 1,113.39 mi (1,791.83 km) |
