There is no direct connection from Vancouver to Ladner. However, you can take the train to Bridgeport Stn Bay 6 then take the line 601 bus to Ladner Exchange Bay 5. Alternatively, you can travel from Vancouver to Ladner in around 21 min.
How to get from Vancouver to Ladner
From King Edward Station train to Bridgeport Stn Bay 6 then line 601 bus to Ladner Exchange Bay 5. 34 min $6. From Vancouver taxi to Ladner. 21 min $56. From Vancouver drive to Ladner. 21 min $2.