| Lake Barcroft to Octeville | 3,650.67 mi (5,875.19 km) |
| Lake Barcroft to Oignies | 3,824.08 mi (6,154.26 km) |
| Lake Barcroft to Oissel | 3,772.82 mi (6,071.77 km) |
| Lake Barcroft to Olivet | 3,844.56 mi (6,187.22 km) |
| Lake Barcroft to Ollioules | 4,154.09 mi (6,685.36 km) |
| Lake Barcroft to Olonne-sur-Mer | 3,717.87 mi (5,983.33 km) |
| Lake Barcroft to Oloron-Sainte-Marie | 3,858.59 mi (6,209.79 km) |
| Lake Barcroft to Onet Village | 3,971.05 mi (6,390.79 km) |
| Lake Barcroft to Onnaing | 3,850.91 mi (6,197.43 km) |
| Lake Barcroft to Orange | 4,076.93 mi (6,561.19 km) |
| Lake Barcroft to Orchies | 3,834.21 mi (6,170.57 km) |
| Lake Barcroft to Orleans | 3,843.91 mi (6,186.18 km) |
| Lake Barcroft to Orly | 3,842.74 mi (6,184.30 km) |
| Lake Barcroft to Ormesson-sur-Marne | 3,847.81 mi (6,192.45 km) |
| Lake Barcroft to Orsay | 3,835.23 mi (6,172.21 km) |
