| Gahanna to Opole | 4,561.12 mi (7,340.41 km) |
| Gahanna to Orzesze | 4,611.04 mi (7,420.76 km) |
| Gahanna to Osowa | 4,434.39 mi (7,136.46 km) |
| Gahanna to Ostroda | 4,512.78 mi (7,262.63 km) |
| Gahanna to Ostroleka | 4,591.88 mi (7,389.91 km) |
| Gahanna to Ostrow Mazowiecka | 4,613.96 mi (7,425.45 km) |
| Gahanna to Ostrow Wielkopolski | 4,518.61 mi (7,272.01 km) |
| Gahanna to Ostrowiec Swietokrzyski | 4,673.48 mi (7,521.24 km) |
| Gahanna to Ostrzeszow | 4,531.81 mi (7,293.24 km) |
| Gahanna to Oswiecim | 4,632.55 mi (7,455.37 km) |
| Gahanna to Otwock | 4,620.36 mi (7,435.74 km) |
| Gahanna to Ozarow Mazowiecki | 4,600.29 mi (7,403.45 km) |
| Gahanna to Ozimek | 4,570.95 mi (7,356.23 km) |
| Gahanna to Ozorkow | 4,557.80 mi (7,335.07 km) |
| Gahanna to Pabianice | 4,573.86 mi (7,360.91 km) |
