| Allendale to Olympia Heights (Florida) | 1,234.02 mi (1,985.96 km) |
| Allendale to Omaha (Nebraska) | 530.87 mi (854.36 km) |
| Allendale to On Top of the World Designated Place (Florida) | 980.25 mi (1,577.55 km) |
| Allendale to Onalaska (Wisconsin) | 271.02 mi (436.16 km) |
| Allendale to Oneida (New York) | 519.31 mi (835.75 km) |
| Allendale to Oneonta (New York) | 553.27 mi (890.41 km) |
| Allendale to Ontario (California) | 1,806.80 mi (2,907.76 km) |
| Allendale to Ontario (Oregon) | 1,547.32 mi (2,490.16 km) |
| Allendale to Opa-locka (Florida) | 1,223.45 mi (1,968.95 km) |
| Allendale to Opelika (Alabama) | 713.95 mi (1,148.99 km) |
| Allendale to Opelousas (Louisiana) | 924.68 mi (1,488.13 km) |
| Allendale to Orange (California) | 1,825.57 mi (2,937.98 km) |
| Allendale to Orange (Texas) | 987.66 mi (1,589.49 km) |
| Allendale to Orange City (Florida) | 1,004.70 mi (1,616.90 km) |
| Allendale to Orangeburg (South Carolina) | 711.10 mi (1,144.40 km) |
