| Phoenixville to Olympia (Washington) | 2,380.67 mi (3,831.32 km) |
| Phoenixville to Olympia Heights (Florida) | 1,033.78 mi (1,663.70 km) |
| Phoenixville to Omaha (Nebraska) | 1,075.86 mi (1,731.43 km) |
| Phoenixville to On Top of the World Designated Place (Florida) | 853.03 mi (1,372.82 km) |
| Phoenixville to Onalaska (Wisconsin) | 844.49 mi (1,359.08 km) |
| Phoenixville to Oneida (New York) | 203.34 mi (327.24 km) |
| Phoenixville to Oneonta (New York) | 161.96 mi (260.65 km) |
| Phoenixville to Ontario (California) | 2,335.37 mi (3,758.41 km) |
| Phoenixville to Ontario (Oregon) | 2,120.21 mi (3,412.15 km) |
| Phoenixville to Opa-locka (Florida) | 1,020.72 mi (1,642.70 km) |
| Phoenixville to Opelika (Alabama) | 752.22 mi (1,210.58 km) |
| Phoenixville to Opelousas (Louisiana) | 1,142.49 mi (1,838.65 km) |
| Phoenixville to Orange (California) | 2,353.11 mi (3,786.96 km) |
| Phoenixville to Orange (Texas) | 1,237.49 mi (1,991.54 km) |
| Phoenixville to Orange City (Florida) | 840.16 mi (1,352.11 km) |
