| Most to Odessa (Texas) | 5,538.34 mi (8,913.10 km) |
| Most to Ogden (Utah) | 5,299.38 mi (8,528.52 km) |
| Most to Oildale (California) | 5,837.45 mi (9,394.46 km) |
| Most to Ojus (Florida) | 5,012.73 mi (8,067.21 km) |
| Most to Okemos (Michigan) | 4,335.44 mi (6,977.22 km) |
| Most to Oklahoma City (Oklahoma) | 5,173.71 mi (8,326.28 km) |
| Most to Okmulgee (Oklahoma) | 5,113.37 mi (8,229.18 km) |
| Most to Olathe (Kansas) | 4,896.89 mi (7,880.78 km) |
| Most to Old Jamestown (Missouri) | 4,740.36 mi (7,628.87 km) |
| Most to Oldsmar (Florida) | 5,007.16 mi (8,058.24 km) |
| Most to Olean (New York) | 4,145.06 mi (6,670.82 km) |
| Most to Olive Branch (Mississippi) | 4,926.26 mi (7,928.05 km) |
| Most to Olivehurst (California) | 5,677.73 mi (9,137.42 km) |
| Most to Olney (Maryland) | 4,231.66 mi (6,810.20 km) |
| Most to Olympia (Washington) | 5,217.43 mi (8,396.63 km) |
