| Phillipsburg to Olympia (Washington) | 2,378.97 mi (3,828.57 km) |
| Phillipsburg to Olympia Heights (Florida) | 1,075.58 mi (1,730.98 km) |
| Phillipsburg to Omaha (Nebraska) | 1,086.81 mi (1,749.06 km) |
| Phillipsburg to On Top of the World Designated Place (Florida) | 895.11 mi (1,440.54 km) |
| Phillipsburg to Onalaska (Wisconsin) | 846.87 mi (1,362.90 km) |
| Phillipsburg to Oneida (New York) | 166.80 mi (268.44 km) |
| Phillipsburg to Oneonta (New York) | 122.14 mi (196.57 km) |
| Phillipsburg to Ontario (California) | 2,351.17 mi (3,783.84 km) |
| Phillipsburg to Ontario (Oregon) | 2,123.31 mi (3,417.13 km) |
| Phillipsburg to Opa-locka (Florida) | 1,062.52 mi (1,709.95 km) |
| Phillipsburg to Opelika (Alabama) | 790.67 mi (1,272.46 km) |
| Phillipsburg to Opelousas (Louisiana) | 1,177.36 mi (1,894.77 km) |
| Phillipsburg to Orange (California) | 2,369.08 mi (3,812.67 km) |
| Phillipsburg to Orange (Texas) | 1,271.47 mi (2,046.24 km) |
| Phillipsburg to Orange City (Florida) | 882.34 mi (1,419.98 km) |
