| Riihimaki to Odessa (Texas) | 5,379.81 mi (8,657.96 km) |
| Riihimaki to Ogden (Utah) | 4,982.33 mi (8,018.28 km) |
| Riihimaki to Oildale (California) | 5,484.77 mi (8,826.88 km) |
| Riihimaki to Ojus (Florida) | 5,141.90 mi (8,275.09 km) |
| Riihimaki to Okemos (Michigan) | 4,265.11 mi (6,864.03 km) |
| Riihimaki to Oklahoma City (Oklahoma) | 5,039.00 mi (8,109.49 km) |
| Riihimaki to Okmulgee (Oklahoma) | 4,992.94 mi (8,035.37 km) |
| Riihimaki to Olathe (Kansas) | 4,761.73 mi (7,663.27 km) |
| Riihimaki to Old Jamestown (Missouri) | 4,650.22 mi (7,483.81 km) |
| Riihimaki to Oldsmar (Florida) | 5,091.04 mi (8,193.24 km) |
| Riihimaki to Olean (New York) | 4,137.38 mi (6,658.46 km) |
| Riihimaki to Olive Branch (Mississippi) | 4,874.45 mi (7,844.67 km) |
| Riihimaki to Olivehurst (California) | 5,282.90 mi (8,502.01 km) |
| Riihimaki to Olney (Maryland) | 4,268.21 mi (6,869.02 km) |
| Riihimaki to Olympia (Washington) | 4,773.46 mi (7,682.14 km) |
