| Darien to Orangevale (California) | 1,755.34 mi (2,824.95 km) |
| Darien to Orchards (Washington) | 1,732.87 mi (2,788.78 km) |
| Darien to Orcutt (California) | 1,810.02 mi (2,912.95 km) |
| Darien to Oregon (Ohio) | 234.79 mi (377.86 km) |
| Darien to Oregon (Wisconsin) | 108.70 mi (174.94 km) |
| Darien to Oregon City (Oregon) | 1,737.45 mi (2,796.16 km) |
| Darien to Orem (Utah) | 1,236.44 mi (1,989.86 km) |
| Darien to Orinda (California) | 1,822.28 mi (2,932.67 km) |
| Darien to Orland Park (Illinois) | 11.34 mi (18.25 km) |
| Darien to Orlando (Florida) | 989.84 mi (1,592.99 km) |
| Darien to Ormond Beach (Florida) | 942.17 mi (1,516.28 km) |
| Darien to Oro Valley (Arizona) | 1,415.60 mi (2,278.19 km) |
| Darien to Oroville (California) | 1,756.72 mi (2,827.16 km) |
| Darien to Oshkosh (Wisconsin) | 160.10 mi (257.65 km) |
| Darien to Oskaloosa (Iowa) | 242.97 mi (391.03 km) |
