| National City to Oxford (Alabama) | 1,801.24 mi (2,898.82 km) |
| National City to Oxford (Mississippi) | 1,587.37 mi (2,554.63 km) |
| National City to Oxford (Ohio) | 1,856.41 mi (2,987.60 km) |
| National City to Oxnard (California) | 160.05 mi (257.58 km) |
| National City to Oxon Hill (Maryland) | 2,271.48 mi (3,655.59 km) |
| National City to Ozark (Alabama) | 1,836.88 mi (2,956.17 km) |
| National City to Ozark (Missouri) | 1,383.48 mi (2,226.49 km) |
| National City to Pace (Florida) | 1,760.51 mi (2,833.26 km) |
| National City to Pacific Grove (California) | 387.08 mi (622.95 km) |
| National City to Pacifica (California) | 457.18 mi (735.76 km) |
| National City to Paducah (Kentucky) | 1,635.14 mi (2,631.51 km) |
| National City to Pahrump (Nevada) | 253.71 mi (408.31 km) |
| National City to Painesville (Ohio) | 2,052.88 mi (3,303.80 km) |
| National City to Palatine (Illinois) | 1,712.96 mi (2,756.74 km) |
| National City to Palatka (Florida) | 2,095.42 mi (3,372.26 km) |
