Prior to 1978, Gilgit-Baltistan was cut off from Pakistan due to the harsh terrain and the lack of accessible roads. All of the roads to the south opened towards the Pakistani-controlled state of Azad Jammu and Kashmir (AKJ) and to the southeast towards the present-day Indian-controlled state of Jammu and Kashmir. During the summer, people could walk across the mountain passes to travel to Rawalpindi. The fastest way to travel, however, was by air, but air travel was accessible only to a few privileged local people and to Pakistani military and civilian officials. Then, with the assistance of the Chinese government, Pakistan began construction of the Karakoram Highway (KKH), which was completed in 1978. The Karakoram Highway (KKH) connects Islamabad to Gilgit and Skardu, which are the two major hubs for mountaineering expeditions in Gilgit-Baltistan. The journey from Islamabad to Gilgit takes approximately 20 to 24 hours. Landslides on the Karakoram Highway are very common. The KKH connects Gilgit to Taxkorgan [disambiguation needed] and Kashgar in China via Sust (the customs and health inspection post on the Northern Areas side) and the Khunjerab Pass, the highest paved international border crossing in the world at 4,693 metres (15,397 feet).
Northern Areas Transport Corporation (NATCO) offers bus and jeep transport service to the two hubs and several other popular destinations, lakes, and glaciers in the area.
The Karakoram HighwayIn March 2006, the respective governments announced that, commencing on June 1, 2006, a thrice-weekly bus service would begin across the boundary from Gilgit to Kashgar, China, and road widening work would begin on 600 kilometres of the Karakoram Highway. There would also be one daily bus in each direction between the Sust and Taxkorgan [disambiguation needed border areas of the two political entities.
Pakistan International Airlines used to fly a Fokker F27 aircraft daily between Gilgit Airport and Islamabad International Airport. The flying time was approximately 50 minutes, and the flight was one of the most scenic flights in the world, as its route passes over the mountain Nanga Parbat, the peak of which was higher than the aircraft's cruising altitude. PIA also offers regular flights of Boeing 737 between Skardu and Islamabad. However, the Fokker F27 aircraft was retired after a crash at Multan in 2006. Currently, flights are being operated by PIA to Gilgit on the brand-new ATR42-500 aircraft, which was purchased in 2006. With the new plane, the cancellation of flights is much less than it was the Fokker aircraft. All flights, however, are subject to weather clearance, and, in winter, flights are often delayed by several days.