| Peer to Oswego (Illinois) | 4,205.69 mi (6,768.40 km) |
| Peer to Oswego (New York) | 3,674.70 mi (5,913.86 km) |
| Peer to Otsego (Minnesota) | 4,220.83 mi (6,792.76 km) |
| Peer to Ottawa (Illinois) | 4,239.61 mi (6,822.99 km) |
| Peer to Ottawa (Kansas) | 4,612.81 mi (7,423.60 km) |
| Peer to Ottumwa (Iowa) | 4,387.58 mi (7,061.12 km) |
| Peer to Overland (Missouri) | 4,427.59 mi (7,125.52 km) |
| Peer to Overland Park (Kansas) | 4,577.21 mi (7,366.31 km) |
| Peer to Overlea (Maryland) | 3,857.77 mi (6,208.48 km) |
| Peer to Oviedo (Florida) | 4,564.79 mi (7,346.32 km) |
| Peer to Owasso (Oklahoma) | 4,752.75 mi (7,648.81 km) |
| Peer to Owatonna (Minnesota) | 4,264.81 mi (6,863.55 km) |
| Peer to Owensboro (Kentucky) | 4,350.61 mi (7,001.63 km) |
| Peer to Owings Mills (Maryland) | 3,866.59 mi (6,222.67 km) |
| Peer to Owosso (Michigan) | 3,988.67 mi (6,419.15 km) |
