| Monserrato to Oswego (Illinois) | 4,822.29 mi (7,760.73 km) |
| Monserrato to Oswego (New York) | 4,246.47 mi (6,834.03 km) |
| Monserrato to Otsego (Minnesota) | 4,891.29 mi (7,871.77 km) |
| Monserrato to Ottawa (Illinois) | 4,856.03 mi (7,815.02 km) |
| Monserrato to Ottawa (Kansas) | 5,242.28 mi (8,436.64 km) |
| Monserrato to Ottumwa (Iowa) | 5,020.14 mi (8,079.13 km) |
| Monserrato to Overland (Missouri) | 5,030.38 mi (8,095.61 km) |
| Monserrato to Overland Park (Kansas) | 5,205.65 mi (8,377.68 km) |
| Monserrato to Overlea (Maryland) | 4,386.00 mi (7,058.58 km) |
| Monserrato to Oviedo (Florida) | 5,014.54 mi (8,070.13 km) |
| Monserrato to Owasso (Oklahoma) | 5,368.25 mi (8,639.36 km) |
| Monserrato to Owatonna (Minnesota) | 4,924.81 mi (7,925.72 km) |
| Monserrato to Owensboro (Kentucky) | 4,926.48 mi (7,928.40 km) |
| Monserrato to Owings Mills (Maryland) | 4,396.95 mi (7,076.21 km) |
| Monserrato to Owosso (Michigan) | 4,595.32 mi (7,395.45 km) |
