| La Union to Oswego (Illinois) | 4,449.41 mi (7,160.63 km) |
| La Union to Oswego (New York) | 3,853.11 mi (6,200.97 km) |
| La Union to Otsego (Minnesota) | 4,559.31 mi (7,337.51 km) |
| La Union to Ottawa (Illinois) | 4,482.50 mi (7,213.88 km) |
| La Union to Ottawa (Kansas) | 4,872.55 mi (7,841.61 km) |
| La Union to Ottumwa (Iowa) | 4,655.88 mi (7,492.92 km) |
| La Union to Overland (Missouri) | 4,644.88 mi (7,475.22 km) |
| La Union to Overland Park (Kansas) | 4,835.67 mi (7,782.26 km) |
| La Union to Overlea (Maryland) | 3,964.82 mi (6,380.77 km) |
| La Union to Oviedo (Florida) | 4,547.26 mi (7,318.10 km) |
| La Union to Owasso (Oklahoma) | 4,986.79 mi (8,025.47 km) |
| La Union to Owatonna (Minnesota) | 4,583.50 mi (7,376.43 km) |
| La Union to Owensboro (Kentucky) | 4,525.08 mi (7,282.41 km) |
| La Union to Owings Mills (Maryland) | 3,976.79 mi (6,400.02 km) |
| La Union to Owosso (Michigan) | 4,219.03 mi (6,789.87 km) |
