| Middletown to Oakley (California) | 1,999.81 mi (3,218.39 km) |
| Middletown to Oakton (Virginia) | 380.54 mi (612.43 km) |
| Middletown to Oakville (Missouri) | 327.95 mi (527.79 km) |
| Middletown to Oatfield (Oregon) | 1,971.53 mi (3,172.88 km) |
| Middletown to Ocala (Florida) | 724.44 mi (1,165.87 km) |
| Middletown to Ocean Acres (New Jersey) | 536.71 mi (863.75 km) |
| Middletown to Ocean City (New Jersey) | 521.41 mi (839.12 km) |
| Middletown to Ocean Pines (Maryland) | 501.07 mi (806.40 km) |
| Middletown to Ocean Pointe (Hawaii) | 4,443.78 mi (7,151.57 km) |
| Middletown to Ocean Springs (Mississippi) | 676.18 mi (1,088.21 km) |
| Middletown to Oceanside (California) | 1,872.33 mi (3,013.22 km) |
| Middletown to Oceanside (New York) | 572.30 mi (921.03 km) |
| Middletown to Ocoee (Florida) | 771.86 mi (1,242.19 km) |
| Middletown to Oconomowoc (Wisconsin) | 328.05 mi (527.94 km) |
| Middletown to Odenton (Maryland) | 411.28 mi (661.89 km) |
