Quick Answer
The fastest and most convenient way from Québec City Airport (YQB) to Sainte-Foy is by taxi or rideshare (Uber), taking 15-25 minutes and costing ~$35-$45 CAD. The cheapest option is the RTC public bus (route 78 or 80), costing only $3.75 CAD but taking 45-60 minutes. For a balance of comfort and value, consider a pre-booked shared shuttle (~$20 per person).