| Portlethen to Orbetello | 1,168.10 mi (1,879.87 km) |
| Portlethen to Oria | 1,444.52 mi (2,324.72 km) |
| Portlethen to Oristano | 1,279.42 mi (2,059.03 km) |
| Portlethen to Orta Nova | 1,344.10 mi (2,163.11 km) |
| Portlethen to Orte | 1,193.45 mi (1,920.68 km) |
| Portlethen to Ortona | 1,249.38 mi (2,010.68 km) |
| Portlethen to Orvieto | 1,171.18 mi (1,884.83 km) |
| Portlethen to Orzinuovi | 956.88 mi (1,539.95 km) |
| Portlethen to Osimo | 1,158.37 mi (1,864.22 km) |
| Portlethen to Ospitaletto | 950.71 mi (1,530.02 km) |
| Portlethen to Ostuni | 1,429.36 mi (2,300.34 km) |
| Portlethen to Ottaviano | 1,342.08 mi (2,159.86 km) |
| Portlethen to Ovada | 975.92 mi (1,570.59 km) |
| Portlethen to Ozieri | 1,242.27 mi (1,999.23 km) |
| Portlethen to Paceco | 1,478.27 mi (2,379.05 km) |
