| Fort Smith to Odessa (Texas) | 517.49 mi (832.81 km) |
| Fort Smith to Ogden (Utah) | 1,034.79 mi (1,665.33 km) |
| Fort Smith to Oildale (California) | 1,385.47 mi (2,229.69 km) |
| Fort Smith to Ojus (Florida) | 1,063.13 mi (1,710.95 km) |
| Fort Smith to Okemos (Michigan) | 736.51 mi (1,185.30 km) |
| Fort Smith to Oklahoma City (Oklahoma) | 177.24 mi (285.24 km) |
| Fort Smith to Okmulgee (Oklahoma) | 93.91 mi (151.13 km) |
| Fort Smith to Olathe (Kansas) | 245.42 mi (394.96 km) |
| Fort Smith to Old Jamestown (Missouri) | 329.81 mi (530.77 km) |
| Fort Smith to Oldsmar (Florida) | 851.78 mi (1,370.80 km) |
| Fort Smith to Olean (New York) | 974.80 mi (1,568.79 km) |
| Fort Smith to Olive Branch (Mississippi) | 256.87 mi (413.39 km) |
| Fort Smith to Olivehurst (California) | 1,512.15 mi (2,433.57 km) |
| Fort Smith to Olney (Maryland) | 985.15 mi (1,585.45 km) |
| Fort Smith to Olympia (Washington) | 1,675.43 mi (2,696.34 km) |
