| Klamath Falls to Oerlinghausen | 5,286.23 mi (8,507.37 km) |
| Klamath Falls to Oestrich-Winkel | 5,380.00 mi (8,658.27 km) |
| Klamath Falls to Offenburg | 5,464.46 mi (8,794.20 km) |
| Klamath Falls to Oftersheim | 5,430.59 mi (8,739.68 km) |
| Klamath Falls to Ohrdruf | 5,401.58 mi (8,693.01 km) |
| Klamath Falls to Ohringen | 5,463.83 mi (8,793.18 km) |
| Klamath Falls to Olbernhau | 5,472.89 mi (8,807.77 km) |
| Klamath Falls to Olching | 5,567.37 mi (8,959.81 km) |
| Klamath Falls to Oldenburg | 5,209.06 mi (8,383.17 km) |
| Klamath Falls to Oldenburg in Holstein | 5,206.42 mi (8,378.92 km) |
| Klamath Falls to Olfen | 5,268.16 mi (8,478.29 km) |
| Klamath Falls to Olpe | 5,318.69 mi (8,559.60 km) |
| Klamath Falls to Olsberg | 5,316.39 mi (8,555.90 km) |
| Klamath Falls to Oranienburg | 5,348.75 mi (8,607.98 km) |
| Klamath Falls to Ortenberg | 5,386.90 mi (8,669.37 km) |
