| Sedro-Woolley to Orbetello | 5,544.95 mi (8,923.73 km) |
| Sedro-Woolley to Oria | 5,816.45 mi (9,360.67 km) |
| Sedro-Woolley to Oristano | 5,628.97 mi (9,058.96 km) |
| Sedro-Woolley to Orta Nova | 5,720.88 mi (9,206.86 km) |
| Sedro-Woolley to Orte | 5,572.58 mi (8,968.20 km) |
| Sedro-Woolley to Ortona | 5,627.50 mi (9,056.58 km) |
| Sedro-Woolley to Orvieto | 5,550.21 mi (8,932.20 km) |
| Sedro-Woolley to Orzinuovi | 5,335.74 mi (8,587.05 km) |
| Sedro-Woolley to Osimo | 5,536.61 mi (8,910.31 km) |
| Sedro-Woolley to Ospitaletto | 5,329.88 mi (8,577.61 km) |
| Sedro-Woolley to Ostuni | 5,800.77 mi (9,335.43 km) |
| Sedro-Woolley to Ottaviano | 5,721.42 mi (9,207.73 km) |
| Sedro-Woolley to Ovada | 5,349.05 mi (8,608.47 km) |
| Sedro-Woolley to Ozieri | 5,599.47 mi (9,011.48 km) |
| Sedro-Woolley to Paceco | 5,848.91 mi (9,412.91 km) |
