| Gahanna to Nyon | 4,263.78 mi (6,861.89 km) |
| Gahanna to Oberriet | 4,367.25 mi (7,028.41 km) |
| Gahanna to Obersiggenthal | 4,309.96 mi (6,936.21 km) |
| Gahanna to Oberwil | 4,279.23 mi (6,886.76 km) |
| Gahanna to Oberwingert | 4,328.12 mi (6,965.44 km) |
| Gahanna to Oftringen | 4,300.69 mi (6,921.29 km) |
| Gahanna to Olten | 4,298.86 mi (6,918.35 km) |
| Gahanna to Onex | 4,265.07 mi (6,863.97 km) |
| Gahanna to Opfikon | 4,322.91 mi (6,957.04 km) |
| Gahanna to Ostermundigen | 4,295.82 mi (6,913.46 km) |
| Gahanna to Payerne | 4,277.82 mi (6,884.48 km) |
| Gahanna to Pfaffikon | 4,333.97 mi (6,974.85 km) |
| Gahanna to Plan-les-Ouates | 4,266.33 mi (6,866.00 km) |
| Gahanna to Pratteln | 4,285.01 mi (6,896.05 km) |
| Gahanna to Prilly | 4,273.82 mi (6,878.05 km) |
