| Shannon to Oswego (Illinois) | 3,612.27 mi (5,813.38 km) |
| Shannon to Oswego (New York) | 3,067.35 mi (4,936.43 km) |
| Shannon to Otsego (Minnesota) | 3,650.13 mi (5,874.32 km) |
| Shannon to Ottawa (Illinois) | 3,646.22 mi (5,868.02 km) |
| Shannon to Ottawa (Kansas) | 4,025.05 mi (6,477.70 km) |
| Shannon to Ottumwa (Iowa) | 3,800.39 mi (6,116.14 km) |
| Shannon to Overland (Missouri) | 3,830.38 mi (6,164.40 km) |
| Shannon to Overland Park (Kansas) | 3,988.98 mi (6,419.64 km) |
| Shannon to Overlea (Maryland) | 3,243.44 mi (5,219.80 km) |
| Shannon to Oviedo (Florida) | 3,945.96 mi (6,350.41 km) |
| Shannon to Owasso (Oklahoma) | 4,160.42 mi (6,695.54 km) |
| Shannon to Owatonna (Minnesota) | 3,689.04 mi (5,936.94 km) |
| Shannon to Owensboro (Kentucky) | 3,746.02 mi (6,028.64 km) |
| Shannon to Owings Mills (Maryland) | 3,252.55 mi (5,234.47 km) |
| Shannon to Owosso (Michigan) | 3,391.41 mi (5,457.94 km) |
