| Thornton to Oakley (California) | 5,156.71 mi (8,298.93 km) |
| Thornton to Oakton (Virginia) | 3,560.60 mi (5,730.24 km) |
| Thornton to Oakville (Missouri) | 4,081.01 mi (6,567.75 km) |
| Thornton to Oatfield (Oregon) | 4,749.35 mi (7,643.34 km) |
| Thornton to Ocala (Florida) | 4,235.25 mi (6,815.98 km) |
| Thornton to Ocean Acres (New Jersey) | 3,401.70 mi (5,474.50 km) |
| Thornton to Ocean City (New Jersey) | 3,436.42 mi (5,530.39 km) |
| Thornton to Ocean Pines (Maryland) | 3,499.40 mi (5,631.74 km) |
| Thornton to Ocean Pointe (Hawaii) | 7,056.68 mi (11,356.63 km) |
| Thornton to Ocean Springs (Mississippi) | 4,434.03 mi (7,135.88 km) |
| Thornton to Oceanside (California) | 5,300.99 mi (8,531.11 km) |
| Thornton to Oceanside (New York) | 3,335.45 mi (5,367.89 km) |
| Thornton to Ocoee (Florida) | 4,241.42 mi (6,825.91 km) |
| Thornton to Oconomowoc (Wisconsin) | 3,785.76 mi (6,092.59 km) |
| Thornton to Odenton (Maryland) | 3,528.36 mi (5,678.35 km) |
