| Birkerod to Oria | 1,085.43 mi (1,746.83 km) |
| Birkerod to Oristano | 1,114.36 mi (1,793.39 km) |
| Birkerod to Orta Nova | 1,012.88 mi (1,630.07 km) |
| Birkerod to Orte | 923.99 mi (1,487.01 km) |
| Birkerod to Ortona | 935.75 mi (1,505.94 km) |
| Birkerod to Orvieto | 906.27 mi (1,458.51 km) |
| Birkerod to Orzinuovi | 729.03 mi (1,173.26 km) |
| Birkerod to Osimo | 854.57 mi (1,375.29 km) |
| Birkerod to Ospitaletto | 717.50 mi (1,154.71 km) |
| Birkerod to Ostuni | 1,069.10 mi (1,720.56 km) |
| Birkerod to Ottaviano | 1,039.38 mi (1,672.72 km) |
| Birkerod to Ovada | 791.03 mi (1,273.04 km) |
| Birkerod to Ozieri | 1,065.00 mi (1,713.95 km) |
| Birkerod to Paceco | 1,233.33 mi (1,984.85 km) |
| Birkerod to Pachino | 1,326.71 mi (2,135.13 km) |
