| Gardner to Oakley (California) | 1,445.29 mi (2,325.97 km) |
| Gardner to Oakton (Virginia) | 946.97 mi (1,523.99 km) |
| Gardner to Oakville (Missouri) | 249.94 mi (402.24 km) |
| Gardner to Oatfield (Oregon) | 1,481.03 mi (2,383.49 km) |
| Gardner to Ocala (Florida) | 987.46 mi (1,589.16 km) |
| Gardner to Ocean Acres (New Jersey) | 1,103.72 mi (1,776.26 km) |
| Gardner to Ocean City (New Jersey) | 1,088.93 mi (1,752.47 km) |
| Gardner to Ocean Pines (Maryland) | 1,066.36 mi (1,716.13 km) |
| Gardner to Ocean Pointe (Hawaii) | 3,883.35 mi (6,249.64 km) |
| Gardner to Ocean Springs (Mississippi) | 677.17 mi (1,089.81 km) |
| Gardner to Oceanside (California) | 1,305.09 mi (2,100.33 km) |
| Gardner to Oceanside (New York) | 1,135.64 mi (1,827.63 km) |
| Gardner to Ocoee (Florida) | 1,043.17 mi (1,678.81 km) |
| Gardner to Oconomowoc (Wisconsin) | 447.43 mi (720.08 km) |
| Gardner to Odenton (Maryland) | 978.42 mi (1,574.62 km) |
