| Darien to Oakley (California) | 1,794.83 mi (2,888.50 km) |
| Darien to Oakton (Virginia) | 595.78 mi (958.82 km) |
| Darien to Oakville (Missouri) | 259.12 mi (417.01 km) |
| Darien to Oatfield (Oregon) | 1,737.18 mi (2,795.71 km) |
| Darien to Ocala (Florida) | 927.62 mi (1,492.86 km) |
| Darien to Ocean Acres (New Jersey) | 729.63 mi (1,174.23 km) |
| Darien to Ocean City (New Jersey) | 722.62 mi (1,162.94 km) |
| Darien to Ocean Pines (Maryland) | 716.37 mi (1,152.89 km) |
| Darien to Ocean Pointe (Hawaii) | 4,239.97 mi (6,823.57 km) |
| Darien to Ocean Springs (Mississippi) | 784.56 mi (1,262.62 km) |
| Darien to Oceanside (California) | 1,702.16 mi (2,739.36 km) |
| Darien to Oceanside (New York) | 748.99 mi (1,205.38 km) |
| Darien to Ocoee (Florida) | 979.09 mi (1,575.69 km) |
| Darien to Oconomowoc (Wisconsin) | 97.19 mi (156.41 km) |
| Darien to Odenton (Maryland) | 621.54 mi (1,000.27 km) |
