Airport Connect bus Route 380 costs $5.40 with SmartRider, 40 minutes to Elizabeth Quay Station. Connect to any Transperth train line for another $2.70-5.40 depending on destination zones.

Taxis fixed rate $55-65 city depending on traffic. Uber/rideshare $35-50 normal times but surges to $70+ during peak arrivals 7-9am and 5-7pm.

Bus obviously cheapest but allow 60 minutes including train connections at Elizabeth Quay. Early morning/late night rideshare beats taxi by $15-20 when no surge pricing active.

Buy SmartRider card at airport train station $10 with credit included. Much better than cash fares which cost double.