| Peoria to Oskaloosa (Iowa) | 162.03 mi (260.77 km) |
| Peoria to Oswego (Illinois) | 92.49 mi (148.85 km) |
| Peoria to Oswego (New York) | 696.87 mi (1,121.51 km) |
| Peoria to Otsego (Minnesota) | 371.66 mi (598.12 km) |
| Peoria to Ottawa (Illinois) | 58.57 mi (94.25 km) |
| Peoria to Ottawa (Kansas) | 335.07 mi (539.25 km) |
| Peoria to Ottumwa (Iowa) | 147.58 mi (237.51 km) |
| Peoria to Overland (Missouri) | 147.55 mi (237.46 km) |
| Peoria to Overland Park (Kansas) | 298.33 mi (480.12 km) |
| Peoria to Overlea (Maryland) | 698.60 mi (1,124.28 km) |
| Peoria to Oviedo (Florida) | 961.88 mi (1,548.00 km) |
| Peoria to Owasso (Oklahoma) | 455.89 mi (733.68 km) |
| Peoria to Owatonna (Minnesota) | 295.30 mi (475.24 km) |
| Peoria to Owensboro (Kentucky) | 246.29 mi (396.37 km) |
| Peoria to Owings Mills (Maryland) | 683.61 mi (1,100.17 km) |
