| Ilhavo to Oerlinghausen | 1,135.54 mi (1,827.48 km) |
| Ilhavo to Oestrich-Winkel | 1,034.21 mi (1,664.40 km) |
| Ilhavo to Offenburg | 978.51 mi (1,574.76 km) |
| Ilhavo to Oftersheim | 1,034.28 mi (1,664.50 km) |
| Ilhavo to Ohrdruf | 1,166.77 mi (1,877.74 km) |
| Ilhavo to Ohringen | 1,065.07 mi (1,714.06 km) |
| Ilhavo to Olbernhau | 1,262.68 mi (2,032.09 km) |
| Ilhavo to Olching | 1,112.88 mi (1,791.01 km) |
| Ilhavo to Oldenburg | 1,171.85 mi (1,885.90 km) |
| Ilhavo to Oldenburg in Holstein | 1,306.83 mi (2,103.14 km) |
| Ilhavo to Olfen | 1,081.71 mi (1,740.84 km) |
| Ilhavo to Olpe | 1,067.70 mi (1,718.30 km) |
| Ilhavo to Olsberg | 1,104.01 mi (1,776.73 km) |
| Ilhavo to Oranienburg | 1,326.17 mi (2,134.27 km) |
| Ilhavo to Ortenberg | 1,086.83 mi (1,749.09 km) |
