It depends on how you want to get there, and how many people in your party. You can take the SkyTrain, but when you buy tickets on Sea Island where the airport is located, they will tack on a $5 surcharge to each ticket, so one adult ticket will be $9.20 and a child ticket will be $7.90. Assuming you're 2 adults, 2 kids 12 and under, that's already $34.20 to take the train, and you have to drag your luggage a couple of blocks to port from the station. Vancouver has flat rate taxis from the airport to port. We paid $40 CAD after tip to get from airport to port. Well worth the extra few bucks to save myself the extra work to start my vacation off.