| Lake Monticello to Oakley (California) | 2,340.44 mi (3,766.57 km) |
| Lake Monticello to Oakton (Virginia) | 86.99 mi (140.00 km) |
| Lake Monticello to Oakville (Missouri) | 651.74 mi (1,048.88 km) |
| Lake Monticello to Oatfield (Oregon) | 2,311.93 mi (3,720.70 km) |
| Lake Monticello to Ocala (Florida) | 642.74 mi (1,034.39 km) |
| Lake Monticello to Ocean Acres (New Jersey) | 251.64 mi (404.97 km) |
| Lake Monticello to Ocean City (New Jersey) | 221.74 mi (356.86 km) |
| Lake Monticello to Ocean Pines (Maryland) | 175.76 mi (282.86 km) |
| Lake Monticello to Ocean Pointe (Hawaii) | 4,782.56 mi (7,696.79 km) |
| Lake Monticello to Ocean Springs (Mississippi) | 790.75 mi (1,272.58 km) |
| Lake Monticello to Oceanside (California) | 2,198.36 mi (3,537.91 km) |
| Lake Monticello to Oceanside (New York) | 313.15 mi (503.97 km) |
| Lake Monticello to Ocoee (Florida) | 671.32 mi (1,080.38 km) |
| Lake Monticello to Oconomowoc (Wisconsin) | 642.06 mi (1,033.29 km) |
| Lake Monticello to Odenton (Maryland) | 118.67 mi (190.98 km) |
