| Flagstaff to Noventa Vicentina | 5,841.71 mi (9,401.33 km) |
| Flagstaff to Novi di Modena | 5,839.94 mi (9,398.47 km) |
| Flagstaff to Novi Ligure | 5,773.90 mi (9,292.19 km) |
| Flagstaff to Nuoro | 6,011.13 mi (9,673.98 km) |
| Flagstaff to Occhiobello | 5,861.48 mi (9,433.13 km) |
| Flagstaff to Oderzo | 5,848.36 mi (9,412.03 km) |
| Flagstaff to Oggiono | 5,743.32 mi (9,242.97 km) |
| Flagstaff to Olbia | 5,987.71 mi (9,636.29 km) |
| Flagstaff to Oleggio | 5,727.74 mi (9,217.91 km) |
| Flagstaff to Olgiate Comasco | 5,730.25 mi (9,221.95 km) |
| Flagstaff to Olgiate Olona | 5,734.70 mi (9,229.12 km) |
| Flagstaff to Omegna | 5,706.48 mi (9,183.69 km) |
| Flagstaff to Opera | 5,758.33 mi (9,267.14 km) |
| Flagstaff to Oppeano | 5,829.16 mi (9,381.12 km) |
| Flagstaff to Orbassano | 5,718.23 mi (9,202.60 km) |
