Compare a Cairns Airport pickup with renting directly in Port Douglas. Rates are often much cheaper in Cairns, and the scenic drive is a great start to your trip.
Book way ahead for peak season. If you're visiting during busy times (like June-August or school holidays), booking your car a few months early can lock in a better price.
Check for weekly deals. Sometimes renting for a full 7 days can be cheaper than for just 5 or 6. Play around with your dates to find the sweet spot.
Be smart about fuel. Petrol is often cheaper in Mossman than Port Douglas. Make sure to fill your tank in Mossman before you cross the Daintree River, where prices jump up.