| Big Spring to Oberkirch | 5,371.95 mi (8,645.33 km) |
| Big Spring to Obernburg am Main | 5,358.26 mi (8,623.29 km) |
| Big Spring to Obernkirchen | 5,259.83 mi (8,464.88 km) |
| Big Spring to Oberschleissheim | 5,512.00 mi (8,870.70 km) |
| Big Spring to Oberstdorf | 5,499.76 mi (8,851.02 km) |
| Big Spring to Obertraubling | 5,503.27 mi (8,856.66 km) |
| Big Spring to Obertshausen | 5,338.00 mi (8,590.67 km) |
| Big Spring to Oberursel | 5,323.27 mi (8,566.98 km) |
| Big Spring to Ochsenfurt | 5,399.36 mi (8,689.43 km) |
| Big Spring to Ochsenhausen | 5,460.01 mi (8,787.04 km) |
| Big Spring to Ochtrup | 5,195.16 mi (8,360.80 km) |
| Big Spring to Odenthal | 5,237.98 mi (8,429.71 km) |
| Big Spring to Oelde | 5,243.36 mi (8,438.38 km) |
| Big Spring to Oelsnitz | 5,441.64 mi (8,757.48 km) |
| Big Spring to Oer-Erkenschwick | 5,219.12 mi (8,399.36 km) |
