| Forest to Oswego (Illinois) | 4,175.11 mi (6,719.19 km) |
| Forest to Oswego (New York) | 3,640.17 mi (5,858.29 km) |
| Forest to Otsego (Minnesota) | 4,195.05 mi (6,751.29 km) |
| Forest to Ottawa (Illinois) | 4,209.05 mi (6,773.81 km) |
| Forest to Ottawa (Kansas) | 4,583.66 mi (7,376.69 km) |
| Forest to Ottumwa (Iowa) | 4,358.50 mi (7,014.32 km) |
| Forest to Overland (Missouri) | 4,396.12 mi (7,074.88 km) |
| Forest to Overland Park (Kansas) | 4,547.95 mi (7,319.21 km) |
| Forest to Overlea (Maryland) | 3,820.54 mi (6,148.57 km) |
| Forest to Oviedo (Florida) | 4,523.82 mi (7,280.39 km) |
| Forest to Owasso (Oklahoma) | 4,722.57 mi (7,600.24 km) |
| Forest to Owatonna (Minnesota) | 4,238.08 mi (6,820.52 km) |
| Forest to Owensboro (Kentucky) | 4,317.06 mi (6,947.64 km) |
| Forest to Owings Mills (Maryland) | 3,829.50 mi (6,162.99 km) |
| Forest to Owosso (Michigan) | 3,957.09 mi (6,368.32 km) |
