| Grays to Odessa (Texas) | 5,024.07 mi (8,085.47 km) |
| Grays to Ogden (Utah) | 4,854.03 mi (7,811.81 km) |
| Grays to Oildale (California) | 5,402.36 mi (8,694.26 km) |
| Grays to Ojus (Florida) | 4,437.07 mi (7,140.78 km) |
| Grays to Okemos (Michigan) | 3,805.15 mi (6,123.79 km) |
| Grays to Oklahoma City (Oklahoma) | 4,655.08 mi (7,491.63 km) |
| Grays to Okmulgee (Oklahoma) | 4,590.70 mi (7,388.02 km) |
| Grays to Olathe (Kansas) | 4,381.31 mi (7,051.04 km) |
| Grays to Old Jamestown (Missouri) | 4,211.89 mi (6,778.38 km) |
| Grays to Oldsmar (Florida) | 4,437.30 mi (7,141.15 km) |
| Grays to Olean (New York) | 3,599.16 mi (5,792.28 km) |
| Grays to Olive Branch (Mississippi) | 4,385.13 mi (7,057.18 km) |
| Grays to Olivehurst (California) | 5,268.00 mi (8,478.02 km) |
| Grays to Olney (Maryland) | 3,674.62 mi (5,913.74 km) |
| Grays to Olympia (Washington) | 4,845.14 mi (7,797.50 km) |
