| Armthorpe to Orbetello | 950.80 mi (1,530.16 km) |
| Armthorpe to Oria | 1,251.92 mi (2,014.77 km) |
| Armthorpe to Oristano | 1,044.45 mi (1,680.88 km) |
| Armthorpe to Orta Nova | 1,145.41 mi (1,843.35 km) |
| Armthorpe to Orte | 982.31 mi (1,580.87 km) |
| Armthorpe to Ortona | 1,048.53 mi (1,687.44 km) |
| Armthorpe to Orvieto | 959.67 mi (1,544.45 km) |
| Armthorpe to Orzinuovi | 746.15 mi (1,200.82 km) |
| Armthorpe to Osimo | 958.24 mi (1,542.13 km) |
| Armthorpe to Ospitaletto | 741.79 mi (1,193.79 km) |
| Armthorpe to Ostuni | 1,237.60 mi (1,991.72 km) |
| Armthorpe to Ottaviano | 1,135.03 mi (1,826.65 km) |
| Armthorpe to Ovada | 753.79 mi (1,213.11 km) |
| Armthorpe to Ozieri | 1,009.98 mi (1,625.41 km) |
| Armthorpe to Paceco | 1,253.98 mi (2,018.09 km) |
