| Enniskillen to Oswego (Illinois) | 3,617.65 mi (5,822.04 km) |
| Enniskillen to Oswego (New York) | 3,084.98 mi (4,964.80 km) |
| Enniskillen to Otsego (Minnesota) | 3,641.33 mi (5,860.16 km) |
| Enniskillen to Ottawa (Illinois) | 3,651.59 mi (5,876.66 km) |
| Enniskillen to Ottawa (Kansas) | 4,026.60 mi (6,480.19 km) |
| Enniskillen to Ottumwa (Iowa) | 3,801.48 mi (6,117.89 km) |
| Enniskillen to Overland (Missouri) | 3,838.71 mi (6,177.81 km) |
| Enniskillen to Overland Park (Kansas) | 3,990.83 mi (6,422.62 km) |
| Enniskillen to Overlea (Maryland) | 3,270.35 mi (5,263.11 km) |
| Enniskillen to Oviedo (Florida) | 3,985.81 mi (6,414.55 km) |
| Enniskillen to Owasso (Oklahoma) | 4,165.15 mi (6,703.16 km) |
| Enniskillen to Owatonna (Minnesota) | 3,683.08 mi (5,927.35 km) |
| Enniskillen to Owensboro (Kentucky) | 3,760.79 mi (6,052.40 km) |
| Enniskillen to Owings Mills (Maryland) | 3,278.96 mi (5,276.97 km) |
| Enniskillen to Owosso (Michigan) | 3,399.69 mi (5,471.28 km) |
