| Hopatcong to Octeville | 3,457.43 mi (5,564.19 km) |
| Hopatcong to Oignies | 3,629.55 mi (5,841.19 km) |
| Hopatcong to Oissel | 3,579.31 mi (5,760.34 km) |
| Hopatcong to Olivet | 3,651.99 mi (5,877.31 km) |
| Hopatcong to Ollioules | 3,964.50 mi (6,380.24 km) |
| Hopatcong to Olonne-sur-Mer | 3,527.37 mi (5,676.75 km) |
| Hopatcong to Oloron-Sainte-Marie | 3,671.33 mi (5,908.44 km) |
| Hopatcong to Onet Village | 3,781.40 mi (6,085.57 km) |
| Hopatcong to Onnaing | 3,656.34 mi (5,884.31 km) |
| Hopatcong to Orange | 3,886.77 mi (6,255.15 km) |
| Hopatcong to Orchies | 3,639.65 mi (5,857.44 km) |
| Hopatcong to Orleans | 3,651.31 mi (5,876.22 km) |
| Hopatcong to Orly | 3,649.42 mi (5,873.17 km) |
| Hopatcong to Ormesson-sur-Marne | 3,654.43 mi (5,881.23 km) |
| Hopatcong to Orsay | 3,641.98 mi (5,861.20 km) |
