| Holyoke to Oberkirch | 3,756.73 mi (6,045.88 km) |
| Holyoke to Obernburg am Main | 3,760.46 mi (6,051.87 km) |
| Holyoke to Obernkirchen | 3,689.01 mi (5,936.90 km) |
| Holyoke to Oberschleissheim | 3,908.05 mi (6,289.40 km) |
| Holyoke to Oberstdorf | 3,882.43 mi (6,248.16 km) |
| Holyoke to Obertraubling | 3,909.10 mi (6,291.08 km) |
| Holyoke to Obertshausen | 3,741.35 mi (6,021.12 km) |
| Holyoke to Oberursel | 3,727.05 mi (5,998.11 km) |
| Holyoke to Ochsenfurt | 3,803.34 mi (6,120.89 km) |
| Holyoke to Ochsenhausen | 3,847.64 mi (6,192.17 km) |
| Holyoke to Ochtrup | 3,615.89 mi (5,819.22 km) |
| Holyoke to Odenthal | 3,645.06 mi (5,866.16 km) |
| Holyoke to Oelde | 3,663.55 mi (5,895.92 km) |
| Holyoke to Oelsnitz | 3,862.84 mi (6,216.64 km) |
| Holyoke to Oer-Erkenschwick | 3,633.57 mi (5,847.66 km) |
