| Red Bluff to Oerlinghausen | 5,421.94 mi (8,725.77 km) |
| Red Bluff to Oestrich-Winkel | 5,514.42 mi (8,874.61 km) |
| Red Bluff to Offenburg | 5,598.04 mi (9,009.17 km) |
| Red Bluff to Oftersheim | 5,564.96 mi (8,955.94 km) |
| Red Bluff to Ohrdruf | 5,537.62 mi (8,911.95 km) |
| Red Bluff to Ohringen | 5,598.54 mi (9,009.98 km) |
| Red Bluff to Olbernhau | 5,609.93 mi (9,028.31 km) |
| Red Bluff to Olching | 5,702.45 mi (9,177.21 km) |
| Red Bluff to Oldenburg | 5,345.15 mi (8,602.19 km) |
| Red Bluff to Oldenburg in Holstein | 5,344.02 mi (8,600.37 km) |
| Red Bluff to Olfen | 5,403.20 mi (8,695.62 km) |
| Red Bluff to Olpe | 5,453.57 mi (8,776.67 km) |
| Red Bluff to Olsberg | 5,451.72 mi (8,773.69 km) |
| Red Bluff to Oranienburg | 5,486.57 mi (8,829.78 km) |
| Red Bluff to Ortenberg | 5,521.99 mi (8,886.78 km) |
