| Riihimaki to Oakley (California) | 5,357.10 mi (8,621.43 km) |
| Riihimaki to Oakton (Virginia) | 4,289.87 mi (6,903.89 km) |
| Riihimaki to Oakville (Missouri) | 4,674.87 mi (7,523.48 km) |
| Riihimaki to Oatfield (Oregon) | 4,877.50 mi (7,849.57 km) |
| Riihimaki to Ocala (Florida) | 5,007.70 mi (8,059.11 km) |
| Riihimaki to Ocean Acres (New Jersey) | 4,151.88 mi (6,681.81 km) |
| Riihimaki to Ocean City (New Jersey) | 4,188.69 mi (6,741.04 km) |
| Riihimaki to Ocean Pines (Maryland) | 4,255.82 mi (6,849.08 km) |
| Riihimaki to Ocean Pointe (Hawaii) | 6,765.67 mi (10,888.30 km) |
| Riihimaki to Ocean Springs (Mississippi) | 5,123.48 mi (8,245.44 km) |
| Riihimaki to Oceanside (California) | 5,600.74 mi (9,013.52 km) |
| Riihimaki to Oceanside (New York) | 4,081.91 mi (6,569.20 km) |
| Riihimaki to Ocoee (Florida) | 5,025.37 mi (8,087.55 km) |
| Riihimaki to Oconomowoc (Wisconsin) | 4,348.05 mi (6,997.50 km) |
| Riihimaki to Odenton (Maryland) | 4,261.86 mi (6,858.81 km) |
