| Trecate to Oswego (Illinois) | 4,549.18 mi (7,321.19 km) |
| Trecate to Oswego (New York) | 3,996.29 mi (6,431.41 km) |
| Trecate to Otsego (Minnesota) | 4,587.42 mi (7,382.74 km) |
| Trecate to Ottawa (Illinois) | 4,583.12 mi (7,375.82 km) |
| Trecate to Ottawa (Kansas) | 4,963.04 mi (7,987.24 km) |
| Trecate to Ottumwa (Iowa) | 4,738.51 mi (7,625.90 km) |
| Trecate to Overland (Missouri) | 4,765.73 mi (7,669.71 km) |
| Trecate to Overland Park (Kansas) | 4,926.90 mi (7,929.08 km) |
| Trecate to Overlea (Maryland) | 4,160.31 mi (6,695.37 km) |
| Trecate to Oviedo (Florida) | 4,834.41 mi (7,780.23 km) |
| Trecate to Owasso (Oklahoma) | 5,097.37 mi (8,203.42 km) |
| Trecate to Owatonna (Minnesota) | 4,627.11 mi (7,446.62 km) |
| Trecate to Owensboro (Kentucky) | 4,676.64 mi (7,526.32 km) |
| Trecate to Owings Mills (Maryland) | 4,170.15 mi (6,711.20 km) |
| Trecate to Owosso (Michigan) | 4,327.08 mi (6,963.76 km) |
