| Opatija to Orangevale (California) | 6,008.30 mi (9,669.42 km) |
| Opatija to Orchards (Washington) | 5,619.30 mi (9,043.39 km) |
| Opatija to Orcutt (California) | 6,215.45 mi (10,002.79 km) |
| Opatija to Oregon (Ohio) | 4,580.63 mi (7,371.81 km) |
| Opatija to Oregon (Wisconsin) | 4,749.71 mi (7,643.92 km) |
| Opatija to Oregon City (Oregon) | 5,641.72 mi (9,079.47 km) |
| Opatija to Orem (Utah) | 5,642.97 mi (9,081.49 km) |
| Opatija to Orinda (California) | 6,082.36 mi (9,788.60 km) |
| Opatija to Orland Park (Illinois) | 4,754.05 mi (7,650.91 km) |
| Opatija to Orlando (Florida) | 5,101.46 mi (8,210.00 km) |
| Opatija to Ormond Beach (Florida) | 5,052.27 mi (8,130.84 km) |
| Opatija to Oro Valley (Arizona) | 6,065.58 mi (9,761.61 km) |
| Opatija to Oroville (California) | 5,968.49 mi (9,605.36 km) |
| Opatija to Oshkosh (Wisconsin) | 4,667.90 mi (7,512.25 km) |
| Opatija to Oskaloosa (Iowa) | 4,948.02 mi (7,963.07 km) |
