Tunisia is roughly 1,600 to 1,650 miles (about 2,590 to 2,590 kilometers) from the United Kingdom when measured as the great-circle (air) distance between the two regions. The exact distance depends on which points you use in each country (e.g., central UK to Tunis, or a specific airport pair), but the common figures cluster around 2,590 km (about 1,610 miles). If you need a precise figure for specific airports (e.g., London to Tunis), share the exact origin and destination airports and I’ll provide the exact great-circle distance.