Uber/Lyft is not in Vancouver......yet. Supposedly we are getting UBER by this Christmastime (which might be too late for you if you are sailing this summer!) A cab is a flat $35 (CDN) fee back to the airport but after a cruise a LOT of people are looking for cabs so the line can get very long. Are you travelling with small children? If it's not too cumbersome I would take the Skytrain (Canada Line) to the airport, it's a 2 block walk to the station and stops right at the terminal. This is what we do; we live here (45 minutes from downtown) and it's cheaper for us to drive to the aiport, pay to park there and then take Canada Line to downtown then it is to take a cab to the port from our home (obviously not $35 for us!)