| Houghton le Spring to Oswego (Illinois) | 3,830.98 mi (6,165.37 km) |
| Houghton le Spring to Oswego (New York) | 3,310.59 mi (5,327.88 km) |
| Houghton le Spring to Otsego (Minnesota) | 3,838.75 mi (6,177.87 km) |
| Houghton le Spring to Ottawa (Illinois) | 3,864.86 mi (6,219.88 km) |
| Houghton le Spring to Ottawa (Kansas) | 4,235.25 mi (6,815.97 km) |
| Houghton le Spring to Ottumwa (Iowa) | 4,009.99 mi (6,453.45 km) |
| Houghton le Spring to Overland (Missouri) | 4,054.69 mi (6,525.39 km) |
| Houghton le Spring to Overland Park (Kansas) | 4,199.86 mi (6,759.03 km) |
| Houghton le Spring to Overlea (Maryland) | 3,502.99 mi (5,637.51 km) |
| Houghton le Spring to Oviedo (Florida) | 4,226.19 mi (6,801.39 km) |
| Houghton le Spring to Owasso (Oklahoma) | 4,377.00 mi (7,044.11 km) |
| Houghton le Spring to Owatonna (Minnesota) | 3,883.82 mi (6,250.40 km) |
| Houghton le Spring to Owensboro (Kentucky) | 3,982.97 mi (6,409.97 km) |
| Houghton le Spring to Owings Mills (Maryland) | 3,511.22 mi (5,650.77 km) |
| Houghton le Spring to Owosso (Michigan) | 3,616.29 mi (5,819.86 km) |
