| Romanshorn to Hizan | 1,777.55 mi (2,860.69 km) |
| Romanshorn to Hopa | 1,624.45 mi (2,614.30 km) |
| Romanshorn to Huyuk | 1,302.24 mi (2,095.75 km) |
| Romanshorn to Idil | 1,786.22 mi (2,874.65 km) |
| Romanshorn to Igdir | 1,793.33 mi (2,886.08 km) |
| Romanshorn to Ihsaniye | 1,206.38 mi (1,941.48 km) |
| Romanshorn to Ilic | 1,555.85 mi (2,503.90 km) |
| Romanshorn to Ilica | 1,656.10 mi (2,665.24 km) |
| Romanshorn to Incesu | 1,433.14 mi (2,306.41 km) |
| Romanshorn to Incirliova | 1,143.99 mi (1,841.07 km) |
| Romanshorn to Inebolu | 1,251.75 mi (2,014.49 km) |
| Romanshorn to Inegol | 1,125.26 mi (1,810.94 km) |
| Romanshorn to Ipsala | 956.65 mi (1,539.57 km) |
| Romanshorn to Iskenderun | 1,559.05 mi (2,509.04 km) |
| Romanshorn to Islahiye | 1,561.38 mi (2,512.80 km) |
