Ski holidays and other far-flung winter road trip destinations will suffer when tax relief for drivers runs out during one of the biggest domestic travel periods, advocates warn.
A fuel excise cut and GST rebate designed to ease surging costs for drivers amid the conflict in Iran are both set to expire on June 30.
It will mean the median cost of filling a 65-litre tank in capital cities will jump by about $14.30 for petrol and $34.13 for diesel as drivers absorb a 32 cents per litre price hike.
But regional tourist destinations will also likely bear a knock-on effect as school holiday drivers elect to stay home, according to the Tourism and Transport Forum.
"We know the costs and the availability of fuel is radically impacting on people's travel plans," the forum's chief executive Margy Osmond told AAP.