| Spout Springs to Orbetello | 4,644.87 mi (7,475.20 km) |
| Spout Springs to Oria | 4,999.88 mi (8,046.54 km) |
| Spout Springs to Oristano | 4,604.77 mi (7,410.67 km) |
| Spout Springs to Orta Nova | 4,884.31 mi (7,860.54 km) |
| Spout Springs to Orte | 4,697.02 mi (7,559.12 km) |
| Spout Springs to Ortona | 4,790.67 mi (7,709.85 km) |
| Spout Springs to Orvieto | 4,676.23 mi (7,525.67 km) |
| Spout Springs to Orzinuovi | 4,495.90 mi (7,235.46 km) |
| Spout Springs to Osimo | 4,712.15 mi (7,583.48 km) |
| Spout Springs to Ospitaletto | 4,497.33 mi (7,237.76 km) |
| Spout Springs to Ostuni | 4,989.19 mi (8,029.33 km) |
| Spout Springs to Ottaviano | 4,845.49 mi (7,798.06 km) |
| Spout Springs to Ovada | 4,461.96 mi (7,180.83 km) |
| Spout Springs to Ozieri | 4,602.56 mi (7,407.11 km) |
| Spout Springs to Paceco | 4,855.08 mi (7,813.50 km) |
