| Philadelphia to Oakleaf Plantation (Florida) | 777.60 mi (1,251.43 km) |
| Philadelphia to Oakley (California) | 2,475.39 mi (3,983.75 km) |
| Philadelphia to Oakton (Virginia) | 139.11 mi (223.88 km) |
| Philadelphia to Oakville (Missouri) | 818.88 mi (1,317.86 km) |
| Philadelphia to Oatfield (Oregon) | 2,402.74 mi (3,866.84 km) |
| Philadelphia to Ocala (Florida) | 847.33 mi (1,363.65 km) |
| Philadelphia to Ocean Acres (New Jersey) | 48.81 mi (78.55 km) |
| Philadelphia to Ocean City (New Jersey) | 58.41 mi (94.01 km) |
| Philadelphia to Ocean Pines (Maryland) | 112.11 mi (180.43 km) |
| Philadelphia to Ocean Pointe (Hawaii) | 4,920.80 mi (7,919.26 km) |
| Philadelphia to Ocean Springs (Mississippi) | 1,014.65 mi (1,632.92 km) |
| Philadelphia to Oceanside (California) | 2,362.75 mi (3,802.48 km) |
| Philadelphia to Oceanside (New York) | 89.93 mi (144.74 km) |
| Philadelphia to Ocoee (Florida) | 869.37 mi (1,399.12 km) |
| Philadelphia to Oconomowoc (Wisconsin) | 722.17 mi (1,162.22 km) |
