| Sammamish to Oerlinghausen | 4,967.67 mi (7,994.69 km) |
| Sammamish to Oestrich-Winkel | 5,066.58 mi (8,153.87 km) |
| Sammamish to Offenburg | 5,154.30 mi (8,295.05 km) |
| Sammamish to Oftersheim | 5,117.30 mi (8,235.50 km) |
| Sammamish to Ohrdruf | 5,081.45 mi (8,177.81 km) |
| Sammamish to Ohringen | 5,149.09 mi (8,286.66 km) |
| Sammamish to Olbernhau | 5,148.36 mi (8,285.49 km) |
| Sammamish to Olching | 5,250.95 mi (8,450.59 km) |
| Sammamish to Oldenburg | 4,888.98 mi (7,868.06 km) |
| Sammamish to Oldenburg in Holstein | 4,879.78 mi (7,853.24 km) |
| Sammamish to Olfen | 4,952.41 mi (7,970.13 km) |
| Sammamish to Olpe | 5,003.53 mi (8,052.40 km) |
| Sammamish to Olsberg | 4,999.36 mi (8,045.70 km) |
| Sammamish to Oranienburg | 5,020.93 mi (8,080.40 km) |
| Sammamish to Ortenberg | 5,070.76 mi (8,160.60 km) |
