| North Potomac to Oschatz | 4,194.63 mi (6,750.61 km) |
| North Potomac to Oschersleben | 4,101.33 mi (6,600.45 km) |
| North Potomac to Osnabruck | 3,970.27 mi (6,389.53 km) |
| North Potomac to Ostbevern | 3,969.05 mi (6,387.56 km) |
| North Potomac to Osterburg | 4,098.11 mi (6,595.27 km) |
| North Potomac to Ostercappeln | 3,975.53 mi (6,398.00 km) |
| North Potomac to Osterhofen | 4,274.81 mi (6,879.64 km) |
| North Potomac to Osterholz-Scharmbeck | 3,973.43 mi (6,394.62 km) |
| North Potomac to Osternienburg | 4,137.27 mi (6,658.29 km) |
| North Potomac to Osterode | 4,071.40 mi (6,552.29 km) |
| North Potomac to Osterwieck | 4,082.33 mi (6,569.87 km) |
| North Potomac to Ostfildern | 4,121.04 mi (6,632.17 km) |
| North Potomac to Osthofen | 4,054.45 mi (6,525.01 km) |
| North Potomac to Ostrhauderfehn | 3,931.03 mi (6,326.37 km) |
| North Potomac to Ostringen | 4,084.39 mi (6,573.18 km) |
