| Flagstaff to Nasaud | 6,121.83 mi (9,852.13 km) |
| Flagstaff to Navodari | 6,403.82 mi (10,305.95 km) |
| Flagstaff to Negresti-Oas | 6,062.41 mi (9,756.50 km) |
| Flagstaff to Nehoiu | 6,283.04 mi (10,111.57 km) |
| Flagstaff to Ocna Mures | 6,157.79 mi (9,910.00 km) |
| Flagstaff to Odobesti | 6,279.09 mi (10,105.21 km) |
| Flagstaff to Odorheiu Secuiesc | 6,201.02 mi (9,979.57 km) |
| Flagstaff to Oltenita | 6,365.23 mi (10,243.85 km) |
| Flagstaff to Onesti | 6,242.78 mi (10,046.78 km) |
| Flagstaff to Oradea | 6,065.96 mi (9,762.22 km) |
| Flagstaff to Orastie | 6,170.06 mi (9,929.75 km) |
| Flagstaff to Oravita | 6,172.21 mi (9,933.21 km) |
| Flagstaff to Orsova | 6,210.34 mi (9,994.57 km) |
| Flagstaff to Otelu Rosu | 6,164.76 mi (9,921.22 km) |
| Flagstaff to Otopeni | 6,323.11 mi (10,176.05 km) |
