| Frauenfeld to Nasaud | 724.01 mi (1,165.18 km) |
| Frauenfeld to Navodari | 970.31 mi (1,561.56 km) |
| Frauenfeld to Negresti-Oas | 674.62 mi (1,085.70 km) |
| Frauenfeld to Nehoiu | 840.45 mi (1,352.58 km) |
| Frauenfeld to Ocna Mures | 708.75 mi (1,140.63 km) |
| Frauenfeld to Odobesti | 868.22 mi (1,397.27 km) |
| Frauenfeld to Odorheiu Secuiesc | 777.08 mi (1,250.59 km) |
| Frauenfeld to Oltenita | 884.75 mi (1,423.87 km) |
| Frauenfeld to Onesti | 846.34 mi (1,362.05 km) |
| Frauenfeld to Oradea | 610.17 mi (981.97 km) |
| Frauenfeld to Orastie | 686.69 mi (1,105.12 km) |
| Frauenfeld to Oravita | 633.68 mi (1,019.81 km) |
| Frauenfeld to Orsova | 673.97 mi (1,084.65 km) |
| Frauenfeld to Otelu Rosu | 653.74 mi (1,052.10 km) |
| Frauenfeld to Otopeni | 847.10 mi (1,363.28 km) |
