| North Mankato to Olympia Heights (Florida) | 1,488.08 mi (2,394.83 km) |
| North Mankato to Omaha (Nebraska) | 226.05 mi (363.79 km) |
| North Mankato to On Top of the World Designated Place (Florida) | 1,225.70 mi (1,972.58 km) |
| North Mankato to Onalaska (Wisconsin) | 142.09 mi (228.67 km) |
| North Mankato to Oneida (New York) | 920.28 mi (1,481.05 km) |
| North Mankato to Oneonta (New York) | 958.98 mi (1,543.33 km) |
| North Mankato to Ontario (California) | 1,437.33 mi (2,313.16 km) |
| North Mankato to Ontario (Oregon) | 1,134.35 mi (1,825.56 km) |
| North Mankato to Opa-locka (Florida) | 1,479.75 mi (2,381.43 km) |
| North Mankato to Opelika (Alabama) | 922.54 mi (1,484.69 km) |
| North Mankato to Opelousas (Louisiana) | 949.55 mi (1,528.15 km) |
| North Mankato to Orange (California) | 1,456.92 mi (2,344.69 km) |
| North Mankato to Orange (Texas) | 971.46 mi (1,563.41 km) |
| North Mankato to Orange City (Florida) | 1,265.65 mi (2,036.87 km) |
| North Mankato to Orangeburg (South Carolina) | 1,021.14 mi (1,643.37 km) |
