| Dubuque to Orthez | 4,301.39 mi (6,922.41 km) |
| Dubuque to Orvault | 4,126.05 mi (6,640.24 km) |
| Dubuque to Osny | 4,204.81 mi (6,766.99 km) |
| Dubuque to Ostwald | 4,437.16 mi (7,140.91 km) |
| Dubuque to Ouistreham | 4,107.72 mi (6,610.74 km) |
| Dubuque to Oullins | 4,440.48 mi (7,146.27 km) |
| Dubuque to Outreau | 4,126.91 mi (6,641.61 km) |
| Dubuque to Oyonnax | 4,451.83 mi (7,164.53 km) |
| Dubuque to Ozoir-la-Ferriere | 4,238.90 mi (6,821.86 km) |
| Dubuque to Pace | 4,088.74 mi (6,580.19 km) |
| Dubuque to Palaiseau | 4,224.67 mi (6,798.95 km) |
| Dubuque to Pamiers | 4,414.84 mi (7,104.99 km) |
| Dubuque to Panazol | 4,296.73 mi (6,914.92 km) |
| Dubuque to Pantin | 4,223.83 mi (6,797.59 km) |
| Dubuque to Paray-le-Monial | 4,384.22 mi (7,055.72 km) |
