| Watford to Ondokuzmayis | 1,845.47 mi (2,970.00 km) |
| Watford to Ordu | 1,942.47 mi (3,126.11 km) |
| Watford to Ortahisar | 1,914.61 mi (3,081.26 km) |
| Watford to Ortakent | 1,680.32 mi (2,704.21 km) |
| Watford to Ortaklar | 1,650.35 mi (2,655.98 km) |
| Watford to Ortakoy | 1,875.18 mi (3,017.80 km) |
| Watford to Ortakoy | 1,860.24 mi (2,993.77 km) |
| Watford to Osmaneli | 1,638.70 mi (2,637.24 km) |
| Watford to Osmaniye | 2,041.43 mi (3,285.37 km) |
| Watford to Ozdere | 1,629.37 mi (2,622.21 km) |
| Watford to Palu | 2,124.65 mi (3,419.30 km) |
| Watford to Pamukkale | 1,712.49 mi (2,755.98 km) |
| Watford to Patnos | 2,226.29 mi (3,582.87 km) |
| Watford to Pazar | 1,905.22 mi (3,066.16 km) |
| Watford to Pazarcik | 2,066.35 mi (3,325.47 km) |
