| Sedro-Woolley to Oerlinghausen | 4,917.27 mi (7,913.59 km) |
| Sedro-Woolley to Oestrich-Winkel | 5,017.19 mi (8,074.39 km) |
| Sedro-Woolley to Offenburg | 5,105.54 mi (8,216.58 km) |
| Sedro-Woolley to Oftersheim | 5,067.93 mi (8,156.04 km) |
| Sedro-Woolley to Ohrdruf | 5,030.70 mi (8,096.14 km) |
| Sedro-Woolley to Ohringen | 5,099.41 mi (8,206.71 km) |
| Sedro-Woolley to Olbernhau | 5,096.70 mi (8,202.35 km) |
| Sedro-Woolley to Olching | 5,200.91 mi (8,370.05 km) |
| Sedro-Woolley to Oldenburg | 4,838.31 mi (7,786.50 km) |
| Sedro-Woolley to Oldenburg in Holstein | 4,827.75 mi (7,769.51 km) |
| Sedro-Woolley to Olfen | 4,902.59 mi (7,889.95 km) |
| Sedro-Woolley to Olpe | 4,953.81 mi (7,972.39 km) |
| Sedro-Woolley to Olsberg | 4,949.27 mi (7,965.08 km) |
| Sedro-Woolley to Oranienburg | 4,968.62 mi (7,996.22 km) |
| Sedro-Woolley to Ortenberg | 5,020.83 mi (8,080.24 km) |
