| Ithaca to Oswego (Illinois) | 608.80 mi (979.76 km) |
| Ithaca to Oswego (New York) | 69.60 mi (112.02 km) |
| Ithaca to Otsego (Minnesota) | 873.01 mi (1,404.97 km) |
| Ithaca to Ottawa (Illinois) | 637.60 mi (1,026.13 km) |
| Ithaca to Ottawa (Kansas) | 1,018.13 mi (1,638.53 km) |
| Ithaca to Ottumwa (Iowa) | 825.28 mi (1,328.16 km) |
| Ithaca to Overland (Missouri) | 771.32 mi (1,241.31 km) |
| Ithaca to Overland Park (Kansas) | 982.05 mi (1,580.45 km) |
| Ithaca to Overlea (Maryland) | 212.81 mi (342.48 km) |
| Ithaca to Oviedo (Florida) | 987.82 mi (1,589.74 km) |
| Ithaca to Owasso (Oklahoma) | 1,113.40 mi (1,791.85 km) |
| Ithaca to Owatonna (Minnesota) | 847.76 mi (1,364.33 km) |
| Ithaca to Owensboro (Kentucky) | 647.00 mi (1,041.24 km) |
| Ithaca to Owings Mills (Maryland) | 210.08 mi (338.09 km) |
| Ithaca to Owosso (Michigan) | 391.20 mi (629.58 km) |
