The ones flying from UK’s London Heathrow can book direct flights with Pakistan International Airlines (PIA) and reach Karachi. Besides, there are several European and Middle Eastern carriers that offer indirect flights from Heathrow to Karachi. For this long-haul journey, many travellers prefer to book Premium Economy seats as it promises a much more relaxed journey as compared to the standard economy seats. At the moment, however, there is hardly any airline offering Premium Economy tickets on this route. But you can still enjoy a major part of your journey in a Premium Economy cabin by booking British Airways’ flights till Dubai or Abu Dhabi. Emirates offers direct flights to Karachi from Dubai and while flying from Abu Dhabi, you can book tickets with Etihad Airways. These direct flights will reach Karachi in around two hours.