| Niagara Falls to Oschatz | 4,070.83 mi (6,551.37 km) |
| Niagara Falls to Oschersleben | 3,977.11 mi (6,400.55 km) |
| Niagara Falls to Osnabruck | 3,849.59 mi (6,195.32 km) |
| Niagara Falls to Ostbevern | 3,849.89 mi (6,195.80 km) |
| Niagara Falls to Osterburg | 3,969.46 mi (6,388.24 km) |
| Niagara Falls to Ostercappeln | 3,854.25 mi (6,202.82 km) |
| Niagara Falls to Osterhofen | 4,163.19 mi (6,700.01 km) |
| Niagara Falls to Osterholz-Scharmbeck | 3,847.03 mi (6,191.20 km) |
| Niagara Falls to Osternienburg | 4,012.88 mi (6,458.11 km) |
| Niagara Falls to Osterode | 3,950.12 mi (6,357.10 km) |
| Niagara Falls to Osterwieck | 3,959.18 mi (6,371.68 km) |
| Niagara Falls to Ostfildern | 4,015.94 mi (6,463.03 km) |
| Niagara Falls to Osthofen | 3,946.14 mi (6,350.69 km) |
| Niagara Falls to Ostrhauderfehn | 3,806.80 mi (6,126.45 km) |
| Niagara Falls to Ostringen | 3,977.84 mi (6,401.71 km) |
