| Gorna Oryahovitsa to Oestrich-Winkel | 961.96 mi (1,548.13 km) |
| Gorna Oryahovitsa to Offenburg | 928.97 mi (1,495.03 km) |
| Gorna Oryahovitsa to Oftersheim | 921.39 mi (1,482.84 km) |
| Gorna Oryahovitsa to Ohrdruf | 880.68 mi (1,417.31 km) |
| Gorna Oryahovitsa to Ohringen | 878.72 mi (1,414.17 km) |
| Gorna Oryahovitsa to Olbernhau | 780.32 mi (1,255.81 km) |
| Gorna Oryahovitsa to Olching | 776.06 mi (1,248.95 km) |
| Gorna Oryahovitsa to Oldenburg | 1,057.26 mi (1,701.50 km) |
| Gorna Oryahovitsa to Oldenburg in Holstein | 1,021.27 mi (1,643.57 km) |
| Gorna Oryahovitsa to Olfen | 1,036.91 mi (1,668.75 km) |
| Gorna Oryahovitsa to Olpe | 997.72 mi (1,605.67 km) |
| Gorna Oryahovitsa to Olsberg | 983.28 mi (1,582.43 km) |
| Gorna Oryahovitsa to Oranienburg | 877.63 mi (1,412.41 km) |
| Gorna Oryahovitsa to Ortenberg | 929.59 mi (1,496.04 km) |
| Gorna Oryahovitsa to Oschatz | 815.02 mi (1,311.64 km) |
