| Sun Prairie to Olympia (Washington) | 1,649.68 mi (2,654.90 km) |
| Sun Prairie to Olympia Heights (Florida) | 1,306.54 mi (2,102.68 km) |
| Sun Prairie to Omaha (Nebraska) | 373.02 mi (600.31 km) |
| Sun Prairie to On Top of the World Designated Place (Florida) | 1,046.08 mi (1,683.50 km) |
| Sun Prairie to Onalaska (Wisconsin) | 110.12 mi (177.22 km) |
| Sun Prairie to Oneida (New York) | 683.76 mi (1,100.40 km) |
| Sun Prairie to Oneonta (New York) | 719.01 mi (1,157.14 km) |
| Sun Prairie to Ontario (California) | 1,646.74 mi (2,650.17 km) |
| Sun Prairie to Ontario (Oregon) | 1,382.54 mi (2,224.98 km) |
| Sun Prairie to Opa-locka (Florida) | 1,297.00 mi (2,087.32 km) |
| Sun Prairie to Opelika (Alabama) | 756.54 mi (1,217.53 km) |
| Sun Prairie to Opelousas (Louisiana) | 888.42 mi (1,429.77 km) |
| Sun Prairie to Orange (California) | 1,665.73 mi (2,680.73 km) |
| Sun Prairie to Orange (Texas) | 936.16 mi (1,506.61 km) |
| Sun Prairie to Orange City (Florida) | 1,078.62 mi (1,735.87 km) |
