| Forest Grove to Octeville | 4,984.31 mi (8,021.46 km) |
| Forest Grove to Oignies | 5,063.61 mi (8,149.09 km) |
| Forest Grove to Oissel | 5,075.45 mi (8,168.14 km) |
| Forest Grove to Olivet | 5,179.35 mi (8,335.36 km) |
| Forest Grove to Ollioules | 5,556.25 mi (8,941.93 km) |
| Forest Grove to Olonne-sur-Mer | 5,147.39 mi (8,283.92 km) |
| Forest Grove to Oloron-Sainte-Marie | 5,364.84 mi (8,633.88 km) |
| Forest Grove to Onet Village | 5,394.42 mi (8,681.47 km) |
| Forest Grove to Onnaing | 5,083.81 mi (8,181.60 km) |
| Forest Grove to Orange | 5,470.04 mi (8,803.19 km) |
| Forest Grove to Orchies | 5,069.81 mi (8,159.06 km) |
| Forest Grove to Orleans | 5,177.44 mi (8,332.28 km) |
| Forest Grove to Orly | 5,143.82 mi (8,278.17 km) |
| Forest Grove to Ormesson-sur-Marne | 5,145.40 mi (8,280.72 km) |
| Forest Grove to Orsay | 5,140.82 mi (8,273.34 km) |
