| Guaynabo to Olympia Heights (Florida) | 1,041.54 mi (1,676.20 km) |
| Guaynabo to Omaha (Nebraska) | 2,369.66 mi (3,813.60 km) |
| Guaynabo to On Top of the World Designated Place (Florida) | 1,260.62 mi (2,028.77 km) |
| Guaynabo to Onalaska (Wisconsin) | 2,284.99 mi (3,677.34 km) |
| Guaynabo to Oneida (New York) | 1,795.02 mi (2,888.80 km) |
| Guaynabo to Oneonta (New York) | 1,744.16 mi (2,806.95 km) |
| Guaynabo to Ontario (California) | 3,332.42 mi (5,363.02 km) |
| Guaynabo to Ontario (Oregon) | 3,418.01 mi (5,500.75 km) |
| Guaynabo to Opa-locka (Florida) | 1,042.33 mi (1,677.47 km) |
| Guaynabo to Opelika (Alabama) | 1,549.41 mi (2,493.54 km) |
| Guaynabo to Opelousas (Louisiana) | 1,829.52 mi (2,944.33 km) |
| Guaynabo to Orange (California) | 3,343.26 mi (5,380.45 km) |
| Guaynabo to Orange (Texas) | 1,914.14 mi (3,080.52 km) |
| Guaynabo to Orange City (Florida) | 1,203.65 mi (1,937.09 km) |
| Guaynabo to Orangeburg (South Carolina) | 1,385.99 mi (2,230.53 km) |
