| Potomac to Os | 3,692.47 mi (5,942.45 km) |
| Potomac to Oslo | 3,871.37 mi (6,230.37 km) |
| Potomac to Porsgrunn | 3,856.82 mi (6,206.95 km) |
| Potomac to Randaberg | 3,721.69 mi (5,989.49 km) |
| Potomac to Ringsaker | 3,846.83 mi (6,190.88 km) |
| Potomac to Royken | 3,865.63 mi (6,221.14 km) |
| Potomac to Rygge | 3,883.75 mi (6,250.29 km) |
| Potomac to Sand | 3,873.45 mi (6,233.72 km) |
| Potomac to Sande | 3,861.77 mi (6,214.92 km) |
| Potomac to Sandefjord | 3,873.28 mi (6,233.45 km) |
| Potomac to Sandnes | 3,728.91 mi (6,001.10 km) |
| Potomac to Sandvika | 3,864.88 mi (6,219.93 km) |
| Potomac to Sarpsborg | 3,899.02 mi (6,274.87 km) |
| Potomac to Sem | 3,873.34 mi (6,233.54 km) |
| Potomac to Ski | 3,880.59 mi (6,245.20 km) |
