Booking with Pakistan International Airlines 13 days in advance of your planned departure date is, on average, the best time to get cheap flights from Karachi to Islamabad. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
For Economy class flights the cheapest month to fly the route is September. The most expensive months are December and November.
In terms of precipitation, rainfall in Islamabad ranges from 10.0 - 250.0 inches per month. July is typically the wettest month, when rainfall can reach 250.0 mm. November is typically the driest time to visit Islamabad when rainfall is around 10.0 mm.
If weather is an important factor for your trip to Islamabad, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 31.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 10.0 C).
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