| Heerlerbaan to Olympia Heights (Florida) | 4,705.68 mi (7,573.05 km) |
| Heerlerbaan to Omaha (Nebraska) | 4,535.38 mi (7,298.99 km) |
| Heerlerbaan to On Top of the World Designated Place (Florida) | 4,616.43 mi (7,429.43 km) |
| Heerlerbaan to Onalaska (Wisconsin) | 4,233.64 mi (6,813.38 km) |
| Heerlerbaan to Oneida (New York) | 3,687.95 mi (5,935.19 km) |
| Heerlerbaan to Oneonta (New York) | 3,691.51 mi (5,940.91 km) |
| Heerlerbaan to Ontario (California) | 5,643.61 mi (9,082.52 km) |
| Heerlerbaan to Ontario (Oregon) | 5,045.13 mi (8,119.35 km) |
| Heerlerbaan to Opa-locka (Florida) | 4,693.23 mi (7,553.02 km) |
| Heerlerbaan to Opelika (Alabama) | 4,564.37 mi (7,345.65 km) |
| Heerlerbaan to Opelousas (Louisiana) | 4,939.47 mi (7,949.30 km) |
| Heerlerbaan to Orange (California) | 5,663.96 mi (9,115.26 km) |
| Heerlerbaan to Orange (Texas) | 5,026.08 mi (8,088.70 km) |
| Heerlerbaan to Orange City (Florida) | 4,583.55 mi (7,376.51 km) |
| Heerlerbaan to Orangeburg (South Carolina) | 4,340.70 mi (6,985.68 km) |
