Depart London on an overnight budget flight to Adelaide, booking in advance with airlines such as Qatar Airways or Singapore Airlines for competitive fares.
Arrive in Adelaide, check in at a budget hotel like Ibis Adelaide or a hostel for cost effectiveness, then rest to prepare for a full day of exploring.
Join a cost-effective snorkeling and sightseeing tour with companies like Reef Magic Cruises. Includes gear and lunch. Book in advance. Tours depart ~7am and return ~5pm.
Budget-friendly full day guided tour visiting the rainforest and coast with wildlife spotting. Includes hotel pick up, lunch and entry fees. Tours last approx 10 hours.
Depart Cairns on a flight back to London via major hub, booking budget-friendly options in advance for best price and duration about 24 hours with stopover.