| Holmen to Olympia Heights (Florida) | 1,401.75 mi (2,255.89 km) |
| Holmen to Omaha (Nebraska) | 306.93 mi (493.96 km) |
| Holmen to On Top of the World Designated Place (Florida) | 1,139.92 mi (1,834.52 km) |
| Holmen to Onalaska (Wisconsin) | 6.37 mi (10.26 km) |
| Holmen to Oneida (New York) | 782.96 mi (1,260.05 km) |
| Holmen to Oneonta (New York) | 821.05 mi (1,321.35 km) |
| Holmen to Ontario (California) | 1,562.72 mi (2,514.95 km) |
| Holmen to Ontario (Oregon) | 1,272.68 mi (2,048.18 km) |
| Holmen to Opa-locka (Florida) | 1,392.66 mi (2,241.27 km) |
| Holmen to Opelika (Alabama) | 843.51 mi (1,357.50 km) |
| Holmen to Opelousas (Louisiana) | 930.06 mi (1,496.78 km) |
| Holmen to Orange (California) | 1,582.06 mi (2,546.08 km) |
| Holmen to Orange (Texas) | 966.52 mi (1,555.46 km) |
| Holmen to Orange City (Florida) | 1,175.49 mi (1,891.76 km) |
| Holmen to Orangeburg (South Carolina) | 913.95 mi (1,470.85 km) |
