| Baldock to Olympia Heights (Florida) | 4,428.47 mi (7,126.94 km) |
| Baldock to Omaha (Nebraska) | 4,270.88 mi (6,873.31 km) |
| Baldock to On Top of the World Designated Place (Florida) | 4,338.44 mi (6,982.05 km) |
| Baldock to Onalaska (Wisconsin) | 3,968.00 mi (6,385.87 km) |
| Baldock to Oneida (New York) | 3,412.27 mi (5,491.52 km) |
| Baldock to Oneonta (New York) | 3,415.26 mi (5,496.33 km) |
| Baldock to Ontario (California) | 5,396.71 mi (8,685.16 km) |
| Baldock to Ontario (Oregon) | 4,811.15 mi (7,742.79 km) |
| Baldock to Opa-locka (Florida) | 4,416.00 mi (7,106.87 km) |
| Baldock to Opelika (Alabama) | 4,287.21 mi (6,899.60 km) |
| Baldock to Opelousas (Louisiana) | 4,663.81 mi (7,505.68 km) |
| Baldock to Orange (California) | 5,417.10 mi (8,717.98 km) |
| Baldock to Orange (Texas) | 4,751.01 mi (7,646.02 km) |
| Baldock to Orange City (Florida) | 4,305.62 mi (6,929.23 km) |
| Baldock to Orangeburg (South Carolina) | 4,062.88 mi (6,538.58 km) |
