| Omurtag to Olivenza | 1,764.88 mi (2,840.30 km) |
| Omurtag to Olot | 1,213.68 mi (1,953.23 km) |
| Omurtag to Onate | 1,448.19 mi (2,330.64 km) |
| Omurtag to Onda | 1,390.89 mi (2,238.42 km) |
| Omurtag to Onteniente | 1,434.05 mi (2,307.89 km) |
| Omurtag to Orihuela | 1,469.78 mi (2,365.38 km) |
| Omurtag to Osuna | 1,701.88 mi (2,738.91 km) |
| Omurtag to Ourense | 1,728.77 mi (2,782.19 km) |
| Omurtag to Oviedo | 1,614.01 mi (2,597.50 km) |
| Omurtag to Paiporta | 1,410.33 mi (2,269.71 km) |
| Omurtag to Pajara | 2,460.67 mi (3,960.06 km) |
| Omurtag to Palafolls | 1,207.82 mi (1,943.80 km) |
| Omurtag to Palafrugell | 1,183.42 mi (1,904.53 km) |
| Omurtag to Palamos | 1,186.16 mi (1,908.94 km) |
| Omurtag to Palencia | 1,567.98 mi (2,523.43 km) |
