Parkbus operates a bus from Montreal Airport (YUL) to Magog on demand. Tickets cost $29 - $40 and the journey takes 1 h 30 min.
How to get from Montreal Airport (YUL) to Magog
From Dorval train to Montréal, walk to Montreal Tourist Information Center - 1255 Rue Peel, bus to Quebec - Mont Orford National Park, then taxi to Magog. 2 h 36 min $93. From Montreal Airport bus to Montréal, QC then bus to Rue Merry / Rue Bowen. 4 h 44 min $51. From Montreal Airport (YUL) drive to Magog. 1 h 40 min $17.