| Omurtag to Castelli Calepio | 832.79 mi (1,340.24 km) |
| Omurtag to Castelnovo ne' Monti | 803.18 mi (1,292.59 km) |
| Omurtag to Castelnuovo Berardenga | 750.00 mi (1,207.02 km) |
| Omurtag to Castelnuovo di Porto | 709.94 mi (1,142.54 km) |
| Omurtag to Castelnuovo di Verona | 789.59 mi (1,270.72 km) |
| Omurtag to Castelnuovo Rangone | 777.11 mi (1,250.63 km) |
| Omurtag to Castelvetrano | 807.36 mi (1,299.33 km) |
| Omurtag to Castelvetro di Modena | 776.17 mi (1,249.13 km) |
| Omurtag to Castenaso | 750.56 mi (1,207.91 km) |
| Omurtag to Castenedolo | 812.51 mi (1,307.62 km) |
| Omurtag to Castiglion Fiorentino | 729.24 mi (1,173.59 km) |
| Omurtag to Castiglione del Lago | 723.80 mi (1,164.85 km) |
| Omurtag to Castiglione delle Stiviere | 802.22 mi (1,291.04 km) |
| Omurtag to Castrolibero | 591.37 mi (951.71 km) |
| Omurtag to Castrovillari | 575.13 mi (925.58 km) |
