| Portage to Oakleaf Plantation (Florida) | 857.02 mi (1,379.23 km) |
| Portage to Oakley (California) | 1,915.71 mi (3,083.04 km) |
| Portage to Oakton (Virginia) | 491.37 mi (790.78 km) |
| Portage to Oakville (Missouri) | 359.42 mi (578.44 km) |
| Portage to Oatfield (Oregon) | 1,841.97 mi (2,964.36 km) |
| Portage to Ocala (Florida) | 919.98 mi (1,480.56 km) |
| Portage to Ocean Acres (New Jersey) | 613.42 mi (987.21 km) |
| Portage to Ocean City (New Jersey) | 609.39 mi (980.71 km) |
| Portage to Ocean Pines (Maryland) | 609.59 mi (981.04 km) |
| Portage to Ocean Pointe (Hawaii) | 4,359.95 mi (7,016.67 km) |
| Portage to Ocean Springs (Mississippi) | 833.76 mi (1,341.81 km) |
| Portage to Oceanside (California) | 1,828.60 mi (2,942.84 km) |
| Portage to Oceanside (New York) | 628.25 mi (1,011.07 km) |
| Portage to Ocoee (Florida) | 968.11 mi (1,558.02 km) |
| Portage to Oconomowoc (Wisconsin) | 160.13 mi (257.71 km) |
