| Klamath Falls to Nuth | 5,273.80 mi (8,487.36 km) |
| Klamath Falls to Oegstgeest | 5,167.34 mi (8,316.03 km) |
| Klamath Falls to Oirschot | 5,226.44 mi (8,411.15 km) |
| Klamath Falls to Oisterwijk | 5,219.26 mi (8,399.59 km) |
| Klamath Falls to Oldebroek | 5,189.87 mi (8,352.29 km) |
| Klamath Falls to Oldenzaal | 5,223.44 mi (8,406.32 km) |
| Klamath Falls to Ommen | 5,199.34 mi (8,367.52 km) |
| Klamath Falls to Oosterend | 5,163.68 mi (8,310.14 km) |
| Klamath Falls to Oosterhout | 5,206.98 mi (8,379.82 km) |
| Klamath Falls to Oosterwolde | 5,170.07 mi (8,320.43 km) |
| Klamath Falls to Oostzaan | 5,164.62 mi (8,311.64 km) |
| Klamath Falls to Opmeer | 5,151.82 mi (8,291.05 km) |
| Klamath Falls to Oss | 5,217.49 mi (8,396.74 km) |
| Klamath Falls to Oud-Beijerland | 5,185.48 mi (8,345.22 km) |
| Klamath Falls to Oudenbosch | 5,201.12 mi (8,370.39 km) |
