| Ottawa to Portage (Michigan) | 176.61 mi (284.23 km) |
| Ottawa to Portage (Wisconsin) | 155.02 mi (249.48 km) |
| Ottawa to Portales (New Mexico) | 934.03 mi (1,503.17 km) |
| Ottawa to Porterville (California) | 1,660.20 mi (2,671.84 km) |
| Ottawa to Portland (Maine) | 956.37 mi (1,539.12 km) |
| Ottawa to Portland (Oregon) | 1,708.08 mi (2,748.89 km) |
| Ottawa to Portland (Tennessee) | 351.55 mi (565.76 km) |
| Ottawa to Portland (Texas) | 1,046.88 mi (1,684.79 km) |
| Ottawa to Portsmouth (New Hampshire) | 929.08 mi (1,495.21 km) |
| Ottawa to Portsmouth (Ohio) | 359.14 mi (577.98 km) |
| Ottawa to Portsmouth (Virginia) | 736.79 mi (1,185.75 km) |
| Ottawa to Post Falls (Idaho) | 1,443.43 mi (2,322.97 km) |
| Ottawa to Potomac (Maryland) | 634.38 mi (1,020.94 km) |
| Ottawa to Potomac Park (California) | 1,675.31 mi (2,696.15 km) |
| Ottawa to Pottstown (Pennsylvania) | 692.94 mi (1,115.18 km) |
