Searching for cheap Riyadh Islamabad flights? Take a look at the flight schedule and book your travel only on Cleartrip.com. We offer you a wide choice of airlines like Pakistan Intl Air and Saudi Arabian Air for your flight booking. There are 3 weekly flights from Riyadh to Islamabad. The first flight from Riyadh Islamabad is at 2:05 AM, which is Pakistan Intl Air airline 754. The last flight from Riyadh Islamabad is at 10:00 AM, which is Saudi Arabian Air 0722. Be sure to find the best offers and deals for cheap flights from RUH to ISB.