| Arenys de Mar to Oswego (Illinois) | 4,446.87 mi (7,156.54 km) |
| Arenys de Mar to Oswego (New York) | 3,867.34 mi (6,223.88 km) |
| Arenys de Mar to Otsego (Minnesota) | 4,524.77 mi (7,281.92 km) |
| Arenys de Mar to Ottawa (Illinois) | 4,480.51 mi (7,210.69 km) |
| Arenys de Mar to Ottawa (Kansas) | 4,867.83 mi (7,834.01 km) |
| Arenys de Mar to Ottumwa (Iowa) | 4,646.54 mi (7,477.88 km) |
| Arenys de Mar to Overland (Missouri) | 4,652.99 mi (7,488.26 km) |
| Arenys de Mar to Overland Park (Kansas) | 4,831.11 mi (7,774.93 km) |
| Arenys de Mar to Overlea (Maryland) | 4,004.15 mi (6,444.05 km) |
| Arenys de Mar to Oviedo (Florida) | 4,632.86 mi (7,455.86 km) |
| Arenys de Mar to Owasso (Oklahoma) | 4,991.78 mi (8,033.50 km) |
| Arenys de Mar to Owatonna (Minnesota) | 4,556.08 mi (7,332.30 km) |
| Arenys de Mar to Owensboro (Kentucky) | 4,546.77 mi (7,317.32 km) |
| Arenys de Mar to Owings Mills (Maryland) | 4,015.18 mi (6,461.81 km) |
| Arenys de Mar to Owosso (Michigan) | 4,219.08 mi (6,789.95 km) |
