| Humlebaek to Oignies | 546.36 mi (879.28 km) |
| Humlebaek to Oissel | 660.90 mi (1,063.62 km) |
| Humlebaek to Olivet | 718.10 mi (1,155.68 km) |
| Humlebaek to Ollioules | 934.04 mi (1,503.20 km) |
| Humlebaek to Olonne-sur-Mer | 894.62 mi (1,439.75 km) |
| Humlebaek to Oloron-Sainte-Marie | 1,056.40 mi (1,700.11 km) |
| Humlebaek to Onet Village | 911.76 mi (1,467.34 km) |
| Humlebaek to Onnaing | 533.01 mi (857.79 km) |
| Humlebaek to Orange | 884.39 mi (1,423.29 km) |
| Humlebaek to Orchies | 538.70 mi (866.95 km) |
| Humlebaek to Orleans | 715.70 mi (1,151.80 km) |
| Humlebaek to Orly | 655.55 mi (1,055.01 km) |
| Humlebaek to Ormesson-sur-Marne | 649.28 mi (1,044.91 km) |
| Humlebaek to Orsay | 663.69 mi (1,068.11 km) |
| Humlebaek to Orthez | 1,042.71 mi (1,678.07 km) |
