| Middlesex to Oxford (Alabama) | 789.45 mi (1,270.49 km) |
| Middlesex to Oxford (Mississippi) | 927.62 mi (1,492.86 km) |
| Middlesex to Oxford (Ohio) | 546.54 mi (879.57 km) |
| Middlesex to Oxnard (California) | 2,465.35 mi (3,967.59 km) |
| Middlesex to Oxon Hill (Maryland) | 180.26 mi (290.11 km) |
| Middlesex to Ozark (Alabama) | 884.81 mi (1,423.97 km) |
| Middlesex to Ozark (Missouri) | 1,034.70 mi (1,665.19 km) |
| Middlesex to Pace (Florida) | 987.71 mi (1,589.56 km) |
| Middlesex to Pacific Grove (California) | 2,544.60 mi (4,095.14 km) |
| Middlesex to Pacifica (California) | 2,549.07 mi (4,102.32 km) |
| Middlesex to Paducah (Kentucky) | 797.80 mi (1,283.94 km) |
| Middlesex to Pahrump (Nevada) | 2,246.09 mi (3,614.73 km) |
| Middlesex to Painesville (Ohio) | 360.08 mi (579.49 km) |
| Middlesex to Palatine (Illinois) | 709.70 mi (1,142.15 km) |
| Middlesex to Palatka (Florida) | 855.97 mi (1,377.56 km) |
