| Potomac to Oschatz | 4,196.90 mi (6,754.26 km) |
| Potomac to Oschersleben | 4,103.61 mi (6,604.12 km) |
| Potomac to Osnabruck | 3,972.48 mi (6,393.10 km) |
| Potomac to Ostbevern | 3,971.23 mi (6,391.08 km) |
| Potomac to Osterburg | 4,100.49 mi (6,599.10 km) |
| Potomac to Ostercappeln | 3,977.76 mi (6,401.59 km) |
| Potomac to Osterhofen | 4,276.82 mi (6,882.87 km) |
| Potomac to Osterholz-Scharmbeck | 3,975.77 mi (6,398.39 km) |
| Potomac to Osternienburg | 4,139.55 mi (6,661.96 km) |
| Potomac to Osterode | 4,073.62 mi (6,555.86 km) |
| Potomac to Osterwieck | 4,084.59 mi (6,573.51 km) |
| Potomac to Ostfildern | 4,122.91 mi (6,635.19 km) |
| Potomac to Osthofen | 4,056.40 mi (6,528.15 km) |
| Potomac to Ostrhauderfehn | 3,933.32 mi (6,330.07 km) |
| Potomac to Ostringen | 4,086.30 mi (6,576.26 km) |
