| Gig Harbor to Oswego (Illinois) | 1,717.79 mi (2,764.51 km) |
| Gig Harbor to Oswego (New York) | 2,219.64 mi (3,572.17 km) |
| Gig Harbor to Otsego (Minnesota) | 1,382.48 mi (2,224.89 km) |
| Gig Harbor to Ottawa (Illinois) | 1,704.53 mi (2,743.18 km) |
| Gig Harbor to Ottawa (Kansas) | 1,497.88 mi (2,410.61 km) |
| Gig Harbor to Ottumwa (Iowa) | 1,546.80 mi (2,489.34 km) |
| Gig Harbor to Overland (Missouri) | 1,719.26 mi (2,766.89 km) |
| Gig Harbor to Overland Park (Kansas) | 1,513.60 mi (2,435.91 km) |
| Gig Harbor to Overlea (Maryland) | 2,343.53 mi (3,771.55 km) |
| Gig Harbor to Oviedo (Florida) | 2,556.23 mi (4,113.86 km) |
| Gig Harbor to Owasso (Oklahoma) | 1,564.28 mi (2,517.47 km) |
| Gig Harbor to Owatonna (Minnesota) | 1,425.61 mi (2,294.30 km) |
| Gig Harbor to Owensboro (Kentucky) | 1,903.79 mi (3,063.85 km) |
| Gig Harbor to Owings Mills (Maryland) | 2,329.16 mi (3,748.41 km) |
| Gig Harbor to Owosso (Michigan) | 1,875.98 mi (3,019.09 km) |
