| Progress to Oskaloosa (Iowa) | 828.30 mi (1,333.02 km) |
| Progress to Oswego (Illinois) | 606.88 mi (976.68 km) |
| Progress to Oswego (New York) | 219.13 mi (352.66 km) |
| Progress to Otsego (Minnesota) | 915.64 mi (1,473.59 km) |
| Progress to Ottawa (Illinois) | 630.52 mi (1,014.73 km) |
| Progress to Ottawa (Kansas) | 988.15 mi (1,590.27 km) |
| Progress to Ottumwa (Iowa) | 817.09 mi (1,314.98 km) |
| Progress to Overland (Missouri) | 728.99 mi (1,173.20 km) |
| Progress to Overland Park (Kansas) | 953.61 mi (1,534.69 km) |
| Progress to Overlea (Maryland) | 66.21 mi (106.56 km) |
| Progress to Oviedo (Florida) | 840.68 mi (1,352.95 km) |
| Progress to Owasso (Oklahoma) | 1,064.08 mi (1,712.47 km) |
| Progress to Owatonna (Minnesota) | 877.52 mi (1,412.24 km) |
| Progress to Owensboro (Kentucky) | 578.37 mi (930.79 km) |
| Progress to Owings Mills (Maryland) | 60.76 mi (97.78 km) |
