| Gahanna to Opwijk | 4,033.08 mi (6,490.61 km) |
| Gahanna to Ostend | 3,975.89 mi (6,398.58 km) |
| Gahanna to Oud-Heverlee | 4,056.05 mi (6,527.58 km) |
| Gahanna to Oud-Turnhout | 4,053.50 mi (6,523.48 km) |
| Gahanna to Oudenaarde | 4,013.75 mi (6,459.51 km) |
| Gahanna to Oudenburg | 3,980.30 mi (6,405.67 km) |
| Gahanna to Oupeye | 4,098.03 mi (6,595.14 km) |
| Gahanna to Overijse | 4,052.37 mi (6,521.66 km) |
| Gahanna to Overpelt | 4,073.35 mi (6,555.42 km) |
| Gahanna to Paal | 4,069.40 mi (6,549.07 km) |
| Gahanna to Peer | 4,077.38 mi (6,561.92 km) |
| Gahanna to Pepinster | 4,109.27 mi (6,613.22 km) |
| Gahanna to Peruwelz | 4,023.15 mi (6,474.63 km) |
| Gahanna to Perwez | 4,068.31 mi (6,547.31 km) |
| Gahanna to Philippeville | 4,071.05 mi (6,551.72 km) |
