| Gretz-Armainvilliers to Orangevale (California) | 5,492.31 mi (8,839.02 km) |
| Gretz-Armainvilliers to Orchards (Washington) | 5,128.12 mi (8,252.90 km) |
| Gretz-Armainvilliers to Orcutt (California) | 5,686.93 mi (9,152.22 km) |
| Gretz-Armainvilliers to Oregon (Ohio) | 3,995.08 mi (6,429.47 km) |
| Gretz-Armainvilliers to Oregon (Wisconsin) | 4,172.63 mi (6,715.20 km) |
| Gretz-Armainvilliers to Oregon City (Oregon) | 5,149.68 mi (8,287.61 km) |
| Gretz-Armainvilliers to Orem (Utah) | 5,102.55 mi (8,211.76 km) |
| Gretz-Armainvilliers to Orinda (California) | 5,567.51 mi (8,960.04 km) |
| Gretz-Armainvilliers to Orland Park (Illinois) | 4,172.78 mi (6,715.44 km) |
| Gretz-Armainvilliers to Orlando (Florida) | 4,509.85 mi (7,257.91 km) |
| Gretz-Armainvilliers to Ormond Beach (Florida) | 4,460.40 mi (7,178.32 km) |
| Gretz-Armainvilliers to Oro Valley (Arizona) | 5,505.21 mi (8,859.79 km) |
| Gretz-Armainvilliers to Oroville (California) | 5,455.88 mi (8,780.40 km) |
| Gretz-Armainvilliers to Oshkosh (Wisconsin) | 4,091.95 mi (6,585.36 km) |
| Gretz-Armainvilliers to Oskaloosa (Iowa) | 4,372.09 mi (7,036.21 km) |
