You can take the Canada Line train to the end of the line to Waterfront. From Waterfront, you can explore historic Gastown. If you take bus No. 50 from outside Waterfront, you can go to Granville Island, which is a charming area of the city with public markets. Robson St. is good for shopping. Stanley Park and the Seawall are beautiful if it is a sunny day. You can get to these areas by walking from Waterfront or taking the Skytrain to Granville or Burrard stations.

Hmmm…stuck in Vancouver in a 6h layover on a Sunday. I wouldn’t stray too far from the SkyTrain or you will risk making your connecting flight. Remember you will need to check back in at least one hour before your flight is scheduled to leave. So you have an hour to get downtown (or wherever you’re going), three to fool around, and another hour to get back.

I don’t know how often the SkyTain goes on a Sunday these days, but the bus will be less often, and I wouldn’t even think of going out to the suburbs (any bus with a 3-digit number). Those ones are often drop-off only (esp if they are “express” buses) and you may have fun getting back.

But I agree with the other responder. Go downtown and maybe the park and three hours will be gone in no time! Have fun!! :c)

Silver_cherub covered much of what I was going to suggest. If you do head out to the waterfront, you might stop by Harbour Centre and take in the view from the observation area at the top of the building, Not sure if your a craft beer fan, but there are some pretty amazing pubs in the city as well. And of course Donderjager is spot on with advice about less frequent public transit on Sundays. Vancouver is a beautiful city, so do have fun with the time you have.