| Eugene to Orbetello | 5,827.31 mi (9,378.15 km) |
| Eugene to Oria | 6,105.88 mi (9,826.47 km) |
| Eugene to Oristano | 5,904.13 mi (9,501.77 km) |
| Eugene to Orta Nova | 6,008.45 mi (9,669.67 km) |
| Eugene to Orte | 5,856.66 mi (9,425.38 km) |
| Eugene to Ortona | 5,914.27 mi (9,518.10 km) |
| Eugene to Orvieto | 5,834.18 mi (9,389.20 km) |
| Eugene to Orzinuovi | 5,619.72 mi (9,044.07 km) |
| Eugene to Osimo | 5,823.28 mi (9,371.66 km) |
| Eugene to Ospitaletto | 5,614.23 mi (9,035.23 km) |
| Eugene to Ostuni | 6,090.34 mi (9,801.45 km) |
| Eugene to Ottaviano | 6,006.79 mi (9,666.99 km) |
| Eugene to Ovada | 5,630.35 mi (9,061.17 km) |
| Eugene to Ozieri | 5,876.18 mi (9,456.81 km) |
| Eugene to Paceco | 6,128.21 mi (9,862.40 km) |
