| Riihimaki to Portage (Michigan) | 4,326.17 mi (6,962.30 km) |
| Riihimaki to Portage (Wisconsin) | 4,345.74 mi (6,993.79 km) |
| Riihimaki to Portales (New Mexico) | 5,257.58 mi (8,461.25 km) |
| Riihimaki to Porterville (California) | 5,442.89 mi (8,759.48 km) |
| Riihimaki to Portland (Maine) | 3,810.67 mi (6,132.69 km) |
| Riihimaki to Portland (Oregon) | 4,869.99 mi (7,837.49 km) |
| Riihimaki to Portland (Tennessee) | 4,685.98 mi (7,541.36 km) |
| Riihimaki to Portland (Texas) | 5,507.74 mi (8,863.85 km) |
| Riihimaki to Portsmouth (New Hampshire) | 3,860.37 mi (6,212.66 km) |
| Riihimaki to Portsmouth (Ohio) | 4,458.37 mi (7,175.05 km) |
| Riihimaki to Portsmouth (Virginia) | 4,380.89 mi (7,050.37 km) |
| Riihimaki to Post Falls (Idaho) | 4,643.92 mi (7,473.66 km) |
| Riihimaki to Potomac (Maryland) | 4,279.47 mi (6,887.14 km) |
| Riihimaki to Potomac Park (California) | 5,488.02 mi (8,832.12 km) |
| Riihimaki to Pottstown (Pennsylvania) | 4,162.81 mi (6,699.39 km) |
