| Helena to Oschatz | 4,929.72 mi (7,933.61 km) |
| Helena to Oschersleben | 4,842.27 mi (7,792.88 km) |
| Helena to Osnabruck | 4,743.12 mi (7,633.32 km) |
| Helena to Ostbevern | 4,750.58 mi (7,645.33 km) |
| Helena to Osterburg | 4,813.59 mi (7,746.72 km) |
| Helena to Ostercappeln | 4,744.51 mi (7,635.55 km) |
| Helena to Osterhofen | 5,072.39 mi (8,163.22 km) |
| Helena to Osterholz-Scharmbeck | 4,713.39 mi (7,585.46 km) |
| Helena to Osternienburg | 4,874.02 mi (7,843.97 km) |
| Helena to Osterode | 4,831.80 mi (7,776.03 km) |
| Helena to Osterwieck | 4,831.09 mi (7,774.88 km) |
| Helena to Ostfildern | 4,967.10 mi (7,993.77 km) |
| Helena to Osthofen | 4,888.53 mi (7,867.33 km) |
| Helena to Ostrhauderfehn | 4,687.32 mi (7,543.51 km) |
| Helena to Ostringen | 4,925.58 mi (7,926.96 km) |
