| Omurtag to Novi di Modena | 779.86 mi (1,255.06 km) |
| Omurtag to Novi Ligure | 883.03 mi (1,421.10 km) |
| Omurtag to Nuoro | 900.23 mi (1,448.78 km) |
| Omurtag to Occhiobello | 746.80 mi (1,201.85 km) |
| Omurtag to Oderzo | 710.40 mi (1,143.27 km) |
| Omurtag to Oggiono | 860.30 mi (1,384.52 km) |
| Omurtag to Olbia | 879.94 mi (1,416.13 km) |
| Omurtag to Oleggio | 893.50 mi (1,437.95 km) |
| Omurtag to Olgiate Comasco | 878.66 mi (1,414.07 km) |
| Omurtag to Olgiate Olona | 881.67 mi (1,418.90 km) |
| Omurtag to Omegna | 906.14 mi (1,458.29 km) |
| Omurtag to Opera | 864.14 mi (1,390.69 km) |
| Omurtag to Oppeano | 768.50 mi (1,236.79 km) |
| Omurtag to Orbassano | 944.53 mi (1,520.08 km) |
| Omurtag to Orbetello | 771.47 mi (1,241.56 km) |
