There is no lounge on Lady Elliot Island, and the honest reason is simply what kind of place this is: a coral cay at the southern tip of the Great Barrier Reef, run as an eco-resort and conservation destination rather than as a stop built for business travel or a long airside wait.
For genuine lounge access connected to a Great Barrier Reef trip through this island, the realistic options sit back on the mainland. Bundaberg, the regional Queensland town most small charter flights to Lady Elliot depart from, has its own modest regional airport without a developed lounge culture of its own to speak of. Brisbane Airport (BNE), Queensland's major hub, is where real lounge infrastructure exists, including a Qantas Club for eligible members and premium-cabin passengers alongside a Virgin Australia lounge, arrangements worth confirming directly since airline lounge terms do get updated.
The island itself is built entirely around the reef experience rather than around transit comfort, and most visitors arrive already booked into a stay focused on the marine life just offshore, so nobody is really expecting a departures-hall wait once they land. That framing matters more here than at a typical small strip, because Lady Elliot was never meant to function like an airport in the everyday sense at all.
Treat the island's airstrip as a genuinely purpose-built link to a reef and conservation destination rather than a stop where lounge planning makes sense. It is a short grass runway that limits aircraft to small, weight-restricted planes, and passengers step off the tarmac directly into the resort grounds within a short walk, with no terminal building, security hall, or lounge waiting area anywhere in between. Confirm your charter flight's weight limits and schedule directly with the operator, and plan any lounge time around the Brisbane end of your trip instead.