| Lake Hopatcong to Octeville | 3,455.09 mi (5,560.43 km) |
| Lake Hopatcong to Oignies | 3,627.26 mi (5,837.51 km) |
| Lake Hopatcong to Oissel | 3,576.98 mi (5,756.59 km) |
| Lake Hopatcong to Olivet | 3,649.63 mi (5,873.51 km) |
| Lake Hopatcong to Ollioules | 3,962.07 mi (6,376.33 km) |
| Lake Hopatcong to Olonne-sur-Mer | 3,524.95 mi (5,672.86 km) |
| Lake Hopatcong to Oloron-Sainte-Marie | 3,668.86 mi (5,904.46 km) |
| Lake Hopatcong to Onet Village | 3,778.96 mi (6,081.66 km) |
| Lake Hopatcong to Onnaing | 3,654.05 mi (5,880.63 km) |
| Lake Hopatcong to Orange | 3,884.34 mi (6,251.25 km) |
| Lake Hopatcong to Orchies | 3,637.36 mi (5,853.76 km) |
| Lake Hopatcong to Orleans | 3,648.95 mi (5,872.42 km) |
| Lake Hopatcong to Orly | 3,647.08 mi (5,869.41 km) |
| Lake Hopatcong to Ormesson-sur-Marne | 3,652.09 mi (5,877.47 km) |
| Lake Hopatcong to Orsay | 3,639.64 mi (5,857.43 km) |
