| Maryland Heights to Oak Harbor (Washington) | 1,726.22 mi (2,778.09 km) |
| Maryland Heights to Oak Hills (Oregon) | 1,711.21 mi (2,753.92 km) |
| Maryland Heights to Oak Lawn (Illinois) | 251.86 mi (405.32 km) |
| Maryland Heights to Oak Park (California) | 1,596.57 mi (2,569.43 km) |
| Maryland Heights to Oak Park (Illinois) | 260.61 mi (419.42 km) |
| Maryland Heights to Oak Park (Michigan) | 461.66 mi (742.98 km) |
| Maryland Heights to Oak Ridge (Florida) | 878.11 mi (1,413.19 km) |
| Maryland Heights to Oak Ridge (New Jersey) | 860.88 mi (1,385.45 km) |
| Maryland Heights to Oak Ridge (Tennessee) | 389.12 mi (626.23 km) |
| Maryland Heights to Oakdale (California) | 1,641.97 mi (2,642.49 km) |
| Maryland Heights to Oakdale (Minnesota) | 451.61 mi (726.80 km) |
| Maryland Heights to Oakland (California) | 1,714.75 mi (2,759.63 km) |
| Maryland Heights to Oakland (New Jersey) | 874.17 mi (1,406.84 km) |
| Maryland Heights to Oakland Park (Florida) | 1,053.34 mi (1,695.19 km) |
| Maryland Heights to Oakleaf Plantation (Florida) | 768.23 mi (1,236.35 km) |
