| Grand Forks to Oak Harbor (Washington) | 1,173.33 mi (1,888.30 km) |
| Grand Forks to Oak Hills (Oregon) | 1,224.84 mi (1,971.18 km) |
| Grand Forks to Oak Lawn (Illinois) | 626.31 mi (1,007.95 km) |
| Grand Forks to Oak Park (California) | 1,466.25 mi (2,359.71 km) |
| Grand Forks to Oak Park (Illinois) | 616.36 mi (991.94 km) |
| Grand Forks to Oak Park (Michigan) | 773.35 mi (1,244.58 km) |
| Grand Forks to Oak Ridge (Florida) | 1,583.70 mi (2,548.72 km) |
| Grand Forks to Oak Ridge (New Jersey) | 1,205.52 mi (1,940.10 km) |
| Grand Forks to Oak Ridge (Tennessee) | 1,052.98 mi (1,694.60 km) |
| Grand Forks to Oakdale (California) | 1,385.00 mi (2,228.95 km) |
| Grand Forks to Oakdale (Minnesota) | 282.11 mi (454.01 km) |
| Grand Forks to Oakland (California) | 1,443.13 mi (2,322.49 km) |
| Grand Forks to Oakland (New Jersey) | 1,217.03 mi (1,958.63 km) |
| Grand Forks to Oakland Park (Florida) | 1,760.17 mi (2,832.73 km) |
| Grand Forks to Oakleaf Plantation (Florida) | 1,468.66 mi (2,363.58 km) |
