| Phoenixville to Oerlinghausen | 3,887.16 mi (6,255.77 km) |
| Phoenixville to Oestrich-Winkel | 3,916.50 mi (6,302.99 km) |
| Phoenixville to Offenburg | 3,958.65 mi (6,370.83 km) |
| Phoenixville to Oftersheim | 3,958.56 mi (6,370.68 km) |
| Phoenixville to Ohrdruf | 4,001.01 mi (6,439.00 km) |
| Phoenixville to Ohringen | 4,000.84 mi (6,438.74 km) |
| Phoenixville to Olbernhau | 4,107.65 mi (6,610.62 km) |
| Phoenixville to Olching | 4,105.92 mi (6,607.84 km) |
| Phoenixville to Oldenburg | 3,837.47 mi (6,175.81 km) |
| Phoenixville to Oldenburg in Holstein | 3,906.05 mi (6,286.18 km) |
| Phoenixville to Olfen | 3,843.82 mi (6,186.03 km) |
| Phoenixville to Olpe | 3,880.94 mi (6,245.77 km) |
| Phoenixville to Olsberg | 3,897.29 mi (6,272.08 km) |
| Phoenixville to Oranienburg | 4,038.83 mi (6,499.87 km) |
| Phoenixville to Ortenberg | 3,948.55 mi (6,354.57 km) |
