| Troy to Odenton (Maryland) | 415.49 mi (668.66 km) |
| Troy to Odessa (Texas) | 1,284.34 mi (2,066.95 km) |
| Troy to Ogden (Utah) | 1,477.93 mi (2,378.49 km) |
| Troy to Oildale (California) | 1,973.10 mi (3,175.40 km) |
| Troy to Ojus (Florida) | 1,161.07 mi (1,868.56 km) |
| Troy to Okemos (Michigan) | 65.00 mi (104.61 km) |
| Troy to Oklahoma City (Oklahoma) | 912.62 mi (1,468.73 km) |
| Troy to Okmulgee (Oklahoma) | 839.55 mi (1,351.13 km) |
| Troy to Olathe (Kansas) | 661.76 mi (1,065.00 km) |
| Troy to Old Jamestown (Missouri) | 454.33 mi (731.18 km) |
| Troy to Oldsmar (Florida) | 1,004.36 mi (1,616.35 km) |
| Troy to Olean (New York) | 243.19 mi (391.38 km) |
| Troy to Olive Branch (Mississippi) | 637.91 mi (1,026.62 km) |
| Troy to Olivehurst (California) | 2,005.27 mi (3,227.16 km) |
| Troy to Olney (Maryland) | 396.15 mi (637.54 km) |
