| Baraboo to Olympia Heights (Florida) | 1,335.40 mi (2,149.11 km) |
| Baraboo to Omaha (Nebraska) | 356.50 mi (573.74 km) |
| Baraboo to On Top of the World Designated Place (Florida) | 1,074.56 mi (1,729.33 km) |
| Baraboo to Onalaska (Wisconsin) | 78.94 mi (127.05 km) |
| Baraboo to Oneida (New York) | 707.76 mi (1,139.03 km) |
| Baraboo to Oneonta (New York) | 744.13 mi (1,197.57 km) |
| Baraboo to Ontario (California) | 1,626.90 mi (2,618.24 km) |
| Baraboo to Ontario (Oregon) | 1,353.87 mi (2,178.85 km) |
| Baraboo to Opa-locka (Florida) | 1,325.95 mi (2,133.92 km) |
| Baraboo to Opelika (Alabama) | 783.24 mi (1,260.50 km) |
| Baraboo to Opelousas (Louisiana) | 903.56 mi (1,454.14 km) |
| Baraboo to Orange (California) | 1,646.00 mi (2,648.98 km) |
| Baraboo to Orange (Texas) | 948.34 mi (1,526.21 km) |
| Baraboo to Orange City (Florida) | 1,107.79 mi (1,782.81 km) |
| Baraboo to Orangeburg (South Carolina) | 838.74 mi (1,349.83 km) |
