Thank you for your reply. I am obliged to stay in doha for couple of days for some business. Believe it or not, even-though there is no direct flights between AHB-DOH, when i search in QA website, they offer a flight from AHB-RUH through saudia, and from RUH-YUL through QA, and the total price is way cheaper then if fly from JED or RUH, or even DOH to YUL, but they dont offer stop over with all of these options, and i am still stuck with the fare jump if i purchase separate tickets for my route.