| Riga to Noventa Vicentina | 969.82 mi (1,560.77 km) |
| Riga to Novi di Modena | 1,008.45 mi (1,622.94 km) |
| Riga to Novi Ligure | 1,070.05 mi (1,722.07 km) |
| Riga to Nuoro | 1,326.12 mi (2,134.19 km) |
| Riga to Occhiobello | 990.56 mi (1,594.16 km) |
| Riga to Oderzo | 917.26 mi (1,476.19 km) |
| Riga to Oggiono | 995.84 mi (1,602.64 km) |
| Riga to Olbia | 1,284.90 mi (2,067.85 km) |
| Riga to Oleggio | 1,025.78 mi (1,650.83 km) |
| Riga to Olgiate Comasco | 1,006.22 mi (1,619.36 km) |
| Riga to Olgiate Olona | 1,017.05 mi (1,636.78 km) |
| Riga to Omegna | 1,016.32 mi (1,635.62 km) |
| Riga to Opera | 1,022.42 mi (1,645.43 km) |
| Riga to Oppeano | 977.22 mi (1,572.69 km) |
| Riga to Orbassano | 1,089.80 mi (1,753.86 km) |
