| Tigard to Oskaloosa (Iowa) | 1,531.61 mi (2,464.89 km) |
| Tigard to Oswego (Illinois) | 1,730.63 mi (2,785.18 km) |
| Tigard to Oswego (New York) | 2,255.69 mi (3,630.19 km) |
| Tigard to Otsego (Minnesota) | 1,408.48 mi (2,266.73 km) |
| Tigard to Ottawa (Illinois) | 1,714.95 mi (2,759.94 km) |
| Tigard to Ottawa (Kansas) | 1,480.87 mi (2,383.23 km) |
| Tigard to Ottumwa (Iowa) | 1,549.19 mi (2,493.18 km) |
| Tigard to Overland (Missouri) | 1,713.66 mi (2,757.87 km) |
| Tigard to Overland Park (Kansas) | 1,499.52 mi (2,413.24 km) |
| Tigard to Overlea (Maryland) | 2,364.24 mi (3,804.88 km) |
| Tigard to Oviedo (Florida) | 2,533.01 mi (4,076.48 km) |
| Tigard to Owasso (Oklahoma) | 1,533.96 mi (2,468.68 km) |
| Tigard to Owatonna (Minnesota) | 1,444.71 mi (2,325.04 km) |
| Tigard to Owensboro (Kentucky) | 1,900.39 mi (3,058.39 km) |
| Tigard to Owings Mills (Maryland) | 2,349.64 mi (3,781.38 km) |
