| Opfikon to Ukiah (California) | 5,760.39 mi (9,270.46 km) |
| Opfikon to Union (Missouri) | 4,718.50 mi (7,593.69 km) |
| Opfikon to Union City (California) | 5,818.90 mi (9,364.61 km) |
| Opfikon to Union City (Georgia) | 4,689.22 mi (7,546.57 km) |
| Opfikon to Union City (New Jersey) | 3,927.57 mi (6,320.81 km) |
| Opfikon to Union City (Tennessee) | 4,738.40 mi (7,625.72 km) |
| Opfikon to Union Hill-Novelty Hill (Washington) | 5,225.51 mi (8,409.65 km) |
| Opfikon to Union Park (Florida) | 4,785.03 mi (7,700.76 km) |
| Opfikon to Uniondale (New York) | 3,911.26 mi (6,294.56 km) |
| Opfikon to Universal City (Texas) | 5,451.79 mi (8,773.81 km) |
| Opfikon to University (Florida) | 4,860.95 mi (7,822.94 km) |
| Opfikon to University City (Missouri) | 4,681.95 mi (7,534.87 km) |
| Opfikon to University Heights (Ohio) | 4,204.48 mi (6,766.46 km) |
| Opfikon to University of California-Santa Barbara (California) | 5,943.26 mi (9,564.75 km) |
| Opfikon to University Park (Texas) | 5,222.27 mi (8,404.43 km) |
