| Enniskillen to Oerlinghausen | 693.53 mi (1,116.14 km) |
| Enniskillen to Oestrich-Winkel | 725.47 mi (1,167.53 km) |
| Enniskillen to Offenburg | 781.96 mi (1,258.44 km) |
| Enniskillen to Oftersheim | 770.50 mi (1,239.99 km) |
| Enniskillen to Ohrdruf | 805.89 mi (1,296.95 km) |
| Enniskillen to Ohringen | 811.61 mi (1,306.16 km) |
| Enniskillen to Olbernhau | 914.01 mi (1,470.95 km) |
| Enniskillen to Olching | 918.83 mi (1,478.72 km) |
| Enniskillen to Oldenburg | 651.64 mi (1,048.72 km) |
| Enniskillen to Oldenburg in Holstein | 744.24 mi (1,197.74 km) |
| Enniskillen to Olfen | 648.64 mi (1,043.89 km) |
| Enniskillen to Olpe | 685.98 mi (1,103.98 km) |
| Enniskillen to Olsberg | 702.05 mi (1,129.83 km) |
| Enniskillen to Oranienburg | 860.74 mi (1,385.23 km) |
| Enniskillen to Ortenberg | 754.30 mi (1,213.92 km) |
