| Grays to Oakley (California) | 5,335.11 mi (8,586.03 km) |
| Grays to Oakton (Virginia) | 3,695.60 mi (5,947.50 km) |
| Grays to Oakville (Missouri) | 4,232.25 mi (6,811.15 km) |
| Grays to Oatfield (Oregon) | 4,930.96 mi (7,935.61 km) |
| Grays to Ocala (Florida) | 4,359.19 mi (7,015.44 km) |
| Grays to Ocean Acres (New Jersey) | 3,534.14 mi (5,687.65 km) |
| Grays to Ocean City (New Jersey) | 3,568.29 mi (5,742.62 km) |
| Grays to Ocean Pines (Maryland) | 3,630.17 mi (5,842.20 km) |
| Grays to Ocean Pointe (Hawaii) | 7,239.08 mi (11,650.18 km) |
| Grays to Ocean Springs (Mississippi) | 4,570.83 mi (7,356.04 km) |
| Grays to Oceanside (California) | 5,473.90 mi (8,809.38 km) |
| Grays to Oceanside (New York) | 3,468.94 mi (5,582.73 km) |
| Grays to Ocoee (Florida) | 4,363.19 mi (7,021.87 km) |
| Grays to Oconomowoc (Wisconsin) | 3,941.93 mi (6,343.92 km) |
| Grays to Odenton (Maryland) | 3,662.86 mi (5,894.80 km) |
