| Grain Valley to Noventa Vicentina | 5,016.16 mi (8,072.73 km) |
| Grain Valley to Novi di Modena | 5,008.63 mi (8,060.61 km) |
| Grain Valley to Novi Ligure | 4,932.10 mi (7,937.45 km) |
| Grain Valley to Nuoro | 5,141.81 mi (8,274.94 km) |
| Grain Valley to Occhiobello | 5,033.53 mi (8,100.69 km) |
| Grain Valley to Oderzo | 5,030.99 mi (8,096.60 km) |
| Grain Valley to Oggiono | 4,911.43 mi (7,904.19 km) |
| Grain Valley to Olbia | 5,122.95 mi (8,244.60 km) |
| Grain Valley to Oleggio | 4,891.35 mi (7,871.86 km) |
| Grain Valley to Olgiate Comasco | 4,896.67 mi (7,880.43 km) |
| Grain Valley to Olgiate Olona | 4,899.65 mi (7,885.23 km) |
| Grain Valley to Omegna | 4,871.13 mi (7,839.33 km) |
| Grain Valley to Opera | 4,922.94 mi (7,922.70 km) |
| Grain Valley to Oppeano | 5,002.09 mi (8,050.09 km) |
| Grain Valley to Orbassano | 4,872.80 mi (7,842.02 km) |
