| Duncan to Noventa Vicentina | 5,381.36 mi (8,660.46 km) |
| Duncan to Novi di Modena | 5,373.11 mi (8,647.18 km) |
| Duncan to Novi Ligure | 5,295.23 mi (8,521.85 km) |
| Duncan to Nuoro | 5,499.70 mi (8,850.91 km) |
| Duncan to Occhiobello | 5,398.41 mi (8,687.90 km) |
| Duncan to Oderzo | 5,397.12 mi (8,685.83 km) |
| Duncan to Oggiono | 5,275.98 mi (8,490.87 km) |
| Duncan to Olbia | 5,481.80 mi (8,822.11 km) |
| Duncan to Oleggio | 5,255.32 mi (8,457.61 km) |
| Duncan to Olgiate Comasco | 5,261.01 mi (8,466.78 km) |
| Duncan to Olgiate Olona | 5,263.80 mi (8,471.26 km) |
| Duncan to Omegna | 5,235.28 mi (8,425.36 km) |
| Duncan to Opera | 5,287.00 mi (8,508.60 km) |
| Duncan to Oppeano | 5,367.13 mi (8,637.56 km) |
| Duncan to Orbassano | 5,235.48 mi (8,425.68 km) |
