| Irving to Oswego (Illinois) | 771.84 mi (1,242.15 km) |
| Irving to Oswego (New York) | 1,325.69 mi (2,133.49 km) |
| Irving to Otsego (Minnesota) | 875.71 mi (1,409.32 km) |
| Irving to Ottawa (Illinois) | 738.20 mi (1,188.02 km) |
| Irving to Ottawa (Kansas) | 408.05 mi (656.69 km) |
| Irving to Ottumwa (Iowa) | 617.13 mi (993.17 km) |
| Irving to Overland (Missouri) | 547.08 mi (880.43 km) |
| Irving to Overland Park (Kansas) | 435.67 mi (701.14 km) |
| Irving to Overlea (Maryland) | 1,223.49 mi (1,969.02 km) |
| Irving to Oviedo (Florida) | 979.85 mi (1,576.92 km) |
| Irving to Owasso (Oklahoma) | 245.65 mi (395.34 km) |
| Irving to Owatonna (Minnesota) | 801.80 mi (1,290.37 km) |
| Irving to Owensboro (Kentucky) | 650.00 mi (1,046.07 km) |
| Irving to Owings Mills (Maryland) | 1,210.27 mi (1,947.74 km) |
| Irving to Owosso (Michigan) | 986.12 mi (1,587.01 km) |
