| Newark to Olympia Heights (Florida) | 1,095.22 mi (1,762.59 km) |
| Newark to Omaha (Nebraska) | 1,138.66 mi (1,832.50 km) |
| Newark to On Top of the World Designated Place (Florida) | 924.06 mi (1,487.13 km) |
| Newark to Onalaska (Wisconsin) | 895.70 mi (1,441.49 km) |
| Newark to Oneida (New York) | 179.68 mi (289.16 km) |
| Newark to Oneonta (New York) | 128.19 mi (206.30 km) |
| Newark to Ontario (California) | 2,403.86 mi (3,868.63 km) |
| Newark to Ontario (Oregon) | 2,172.02 mi (3,495.53 km) |
| Newark to Opa-locka (Florida) | 1,082.09 mi (1,741.45 km) |
| Newark to Opelika (Alabama) | 832.81 mi (1,340.28 km) |
| Newark to Opelousas (Louisiana) | 1,224.20 mi (1,970.16 km) |
| Newark to Orange (California) | 2,421.79 mi (3,897.50 km) |
| Newark to Orange (Texas) | 1,319.15 mi (2,122.97 km) |
| Newark to Orange City (Florida) | 908.26 mi (1,461.71 km) |
| Newark to Orangeburg (South Carolina) | 620.64 mi (998.82 km) |
