| Gladbeck to Odessa (Texas) | 5,262.38 mi (8,468.98 km) |
| Gladbeck to Ogden (Utah) | 5,053.32 mi (8,132.53 km) |
| Gladbeck to Oildale (California) | 5,596.69 mi (9,007.00 km) |
| Gladbeck to Ojus (Florida) | 4,714.31 mi (7,586.95 km) |
| Gladbeck to Okemos (Michigan) | 4,052.25 mi (6,521.47 km) |
| Gladbeck to Oklahoma City (Oklahoma) | 4,895.72 mi (7,878.89 km) |
| Gladbeck to Okmulgee (Oklahoma) | 4,833.69 mi (7,779.07 km) |
| Gladbeck to Olathe (Kansas) | 4,619.98 mi (7,435.14 km) |
| Gladbeck to Old Jamestown (Missouri) | 4,458.12 mi (7,174.66 km) |
| Gladbeck to Oldsmar (Florida) | 4,710.14 mi (7,580.23 km) |
| Gladbeck to Olean (New York) | 3,855.84 mi (6,205.38 km) |
| Gladbeck to Olive Branch (Mississippi) | 4,639.16 mi (7,466.01 km) |
| Gladbeck to Olivehurst (California) | 5,448.43 mi (8,768.40 km) |
| Gladbeck to Olney (Maryland) | 3,938.54 mi (6,338.46 km) |
| Gladbeck to Olympia (Washington) | 5,004.83 mi (8,054.49 km) |
