If you're looking to fly from London Heathrow to Karachi, you might like to know that 15 / Sep / 2019 currently has the cheapest flights. At the moment, there are ten airlines flying to Karachi. Go through the results to find the right flights for you – you can adjust the filters to see find even more flights to Karachi.
Qatar Airways is the most popular airline that flies from London Heathrow to Karachi. But it's still worth looking at other options, as there are 2,879 flights to Karachi every week. If you want to broaden your search, look at flights departing from other airports.
The distance between to Karachi is 6344 km. Normally, it takes about 12 hrs 30 mins to fly, and you can definitely expect the journey to be at least 9 hrs 40 mins. You can see the various flight times in the results.
If you want to travel in December, it's best to book your flights early, as this is peak season in Karachi. The cheapest month to fly is normally November – try searching three to four months prior to then to get a bargain. You can also search by month, which will reveal the cheapest time of the week to fly.