Cheap open-jaw flight tickets from Sydney to Victoria with Air Canada / Delta Air Lines / Jetstar for only A$1,095 ($777 / £603). Returning from Vancouver.
Date of departure: Dates of flights departures vary according to destination. See details below. Do not forget! Luggage, food, seat reservation and entertainment on board might not be included in the cost with some low cost airlines (Jetstar Airways).
Accomodation
For booking cheaper accommodation in advance we recommend the followings
What you can enjoy in Victoria: family fun, SIGHTSEEING, culture
Vancouver (Canada)
Vancouver - sightseeings and surroundings
Lulu Island
Grouse Mountain
Museum of Anthropology, Vancouver, BC
What you can enjoy in Vancouver: nightlife, SIGHTSEEING, culture
Details of flights (open-jaw flights)
Sydney (SYD, Australia) - Victoria (YYJ, Canada) Vancouver (YVR) - Sydney (SYD) Travel date: May 9, 2019 May 29, 2019 (20 nights) Price: A$1,095 ($777/£603) Distance: 12471.5km Travel duration: 24:19 and 28:25 (there and back) Hand luggage (weight and size): 34x48x23cm 7kg Checked-in Baggage: Not included in the cost.
Airlines: 
4* Air Canada (This flight is with "full-service airline".)
Delta Air Lines (This flight is with "full-service airline".)
Jetstar Airways (These flights are with low-cost airline.)
Flights booking examples
Here is an example of the cheapest flight with Air Canada/Delta Air Lines/Jetstar (you can try Air Canada/Delta Air Lines/Jetstar promo codes) from Sydney to Victoria at a price of A$1,095. In this case is departure flight from Sydney on May 9, 2019 to Victoria. The return way is from Sydney to Victoria on May 29, 2019.