| Opatija to Ukiah (California) | 6,032.40 mi (9,708.21 km) |
| Opatija to Union (Missouri) | 5,024.94 mi (8,086.85 km) |
| Opatija to Union City (California) | 6,094.86 mi (9,808.74 km) |
| Opatija to Union City (Georgia) | 4,998.50 mi (8,044.31 km) |
| Opatija to Union City (New Jersey) | 4,236.85 mi (6,818.55 km) |
| Opatija to Union City (Tennessee) | 5,046.46 mi (8,121.49 km) |
| Opatija to Union Hill-Novelty Hill (Washington) | 5,487.80 mi (8,831.76 km) |
| Opatija to Union Park (Florida) | 5,092.79 mi (8,196.05 km) |
| Opatija to Uniondale (New York) | 4,220.54 mi (6,792.30 km) |
| Opatija to Universal City (Texas) | 5,759.35 mi (9,268.78 km) |
| Opatija to University (Florida) | 5,168.91 mi (8,318.55 km) |
| Opatija to University City (Missouri) | 4,988.54 mi (8,028.28 km) |
| Opatija to University Heights (Ohio) | 4,512.60 mi (7,262.33 km) |
| Opatija to University of California-Santa Barbara (California) | 6,226.45 mi (10,020.50 km) |
| Opatija to University Park (Texas) | 5,529.05 mi (8,898.15 km) |
