| Halen to Oswego (Illinois) | 4,199.76 mi (6,758.86 km) |
| Halen to Oswego (New York) | 3,667.08 mi (5,901.59 km) |
| Halen to Otsego (Minnesota) | 4,216.87 mi (6,786.39 km) |
| Halen to Ottawa (Illinois) | 4,233.69 mi (6,813.46 km) |
| Halen to Ottawa (Kansas) | 4,607.48 mi (7,415.02 km) |
| Halen to Ottumwa (Iowa) | 4,382.27 mi (7,052.58 km) |
| Halen to Overland (Missouri) | 4,421.29 mi (7,115.38 km) |
| Halen to Overland Park (Kansas) | 4,571.83 mi (7,357.65 km) |
| Halen to Overlea (Maryland) | 3,848.96 mi (6,194.31 km) |
| Halen to Oviedo (Florida) | 4,554.29 mi (7,329.41 km) |
| Halen to Owasso (Oklahoma) | 4,746.99 mi (7,639.55 km) |
| Halen to Owatonna (Minnesota) | 4,260.46 mi (6,856.55 km) |
| Halen to Owensboro (Kentucky) | 4,343.42 mi (6,990.06 km) |
| Halen to Owings Mills (Maryland) | 3,857.84 mi (6,208.60 km) |
| Halen to Owosso (Michigan) | 3,982.31 mi (6,408.91 km) |
