| Gretz-Armainvilliers to Oakley (California) | 5,546.54 mi (8,926.29 km) |
| Gretz-Armainvilliers to Oakton (Virginia) | 3,861.71 mi (6,214.82 km) |
| Gretz-Armainvilliers to Oakville (Missouri) | 4,415.17 mi (7,105.53 km) |
| Gretz-Armainvilliers to Oatfield (Oregon) | 5,145.67 mi (8,281.16 km) |
| Gretz-Armainvilliers to Ocala (Florida) | 4,511.99 mi (7,261.35 km) |
| Gretz-Armainvilliers to Ocean Acres (New Jersey) | 3,697.79 mi (5,951.01 km) |
| Gretz-Armainvilliers to Ocean City (New Jersey) | 3,731.26 mi (6,004.88 km) |
| Gretz-Armainvilliers to Ocean Pines (Maryland) | 3,791.82 mi (6,102.35 km) |
| Gretz-Armainvilliers to Ocean Pointe (Hawaii) | 7,452.87 mi (11,994.24 km) |
| Gretz-Armainvilliers to Ocean Springs (Mississippi) | 4,737.54 mi (7,624.34 km) |
| Gretz-Armainvilliers to Oceanside (California) | 5,679.49 mi (9,140.25 km) |
| Gretz-Armainvilliers to Oceanside (New York) | 3,633.85 mi (5,848.11 km) |
| Gretz-Armainvilliers to Ocoee (Florida) | 4,513.56 mi (7,263.88 km) |
| Gretz-Armainvilliers to Oconomowoc (Wisconsin) | 4,130.45 mi (6,647.31 km) |
| Gretz-Armainvilliers to Odenton (Maryland) | 3,828.47 mi (6,161.33 km) |
