QR Business (P class so no lounge access) YUL-DOH-JED CAD~2800/USD~2100
Sample:
https://www.google.com/travel/flight...PitUuvm5jT9Jc7

I have no interest in going to JED but looks like you can turn around in JED and stopover in DOH. Not sure what would happen with baggage or in case of a misconnect. Was able to price this itinerary on the QR website for CAD $2791.55 (but did not click through to purchase yet).