| Atwater to Olympia Heights (Florida) | 2,481.68 mi (3,993.88 km) |
| Atwater to Omaha (Nebraska) | 1,334.88 mi (2,148.29 km) |
| Atwater to On Top of the World Designated Place (Florida) | 2,269.61 mi (3,652.58 km) |
| Atwater to Onalaska (Wisconsin) | 1,596.49 mi (2,569.30 km) |
| Atwater to Oneida (New York) | 2,374.63 mi (3,821.59 km) |
| Atwater to Oneonta (New York) | 2,409.58 mi (3,877.84 km) |
| Atwater to Ontario (California) | 283.79 mi (456.71 km) |
| Atwater to Ontario (Oregon) | 498.40 mi (802.10 km) |
| Atwater to Opa-locka (Florida) | 2,480.40 mi (3,991.82 km) |
| Atwater to Opelika (Alabama) | 2,007.53 mi (3,230.80 km) |
| Atwater to Opelousas (Louisiana) | 1,693.87 mi (2,726.02 km) |
| Atwater to Orange (California) | 290.54 mi (467.58 km) |
| Atwater to Orange (Texas) | 1,614.30 mi (2,597.96 km) |
| Atwater to Orange City (Florida) | 2,329.33 mi (3,748.69 km) |
| Atwater to Orangeburg (South Carolina) | 2,236.25 mi (3,598.90 km) |
