The duopoly

Australia's domestic aviation history is a recurring story. A dominant duopoly exists. The government deregulates or relaxes entry conditions. New carriers appear. Prices fall. The incumbent responds aggressively. The new carrier runs out of capital, or accumulates losses, or gets absorbed. The duopoly reforms. [2,3,4]

Under the Two Airline Policy, Ansett and the government-owned Trans Australia Airlines (later Australian Airlines) were the only carriers permitted to fly between major cities. [1] The duopoly was explicit, legislated, and complete. [1] Notably, scheduled flights on the same routes would take off about five minutes apart, one airline following the other, in a market so regulated that even departure timing was managed. [1]

When deregulation was announced in 1987 and took effect in 1990, both incumbents prepared for competition. [4] The government simultaneously decided to merge Qantas and Australian Airlines, giving Qantas, which had previously been restricted to international flights, a 'fully developed domestic airline system,' [4] while Ansett was given international rights it had to build from scratch. [4] This decision proved consequential: Qantas entered the newly competitive domestic market with an already-mature operation. [4]

Compass Airlines launched in December 1990, offering fares far below the incumbents. [2] It attracted strong demand and collapsed in December 1991, just thirteen months after launch. [2] A second attempt, Compass Mark II, collapsed in 1992. [2] The failures prompted the government to stabilise the market through a temporary one-nation aviation policy. [4]

The early failure of Compass established the pattern that would repeat for the next three decades: a new carrier could enter, attract passengers with low fares, and briefly disrupt the incumbents, but the capital requirements of aviation, the established network advantages of Qantas and Ansett, and the incumbents' willingness to match prices on contested routes made sustained profitability extremely difficult. [2,3]

Ansett Australia's collapse on 14 September 2001, grounded the same week as the September 11 attacks in the United States, was the most significant single event in Australian aviation history. [3] The airline had operated for 65 years. It employed tens of thousands of people. Its failure left Qantas with approximately 70 per cent of the domestic market and no credible full-service competitor. [2,3]

The collapse had been building for years. Ansett had been burdened by poor investment decisions under previous ownership, a deferred fleet renewal programme, and costs significantly above those of the emerging low-cost competitor Virgin Blue. [3,4] Air New Zealand, which had acquired Ansett, could not absorb the losses, estimated at A$1.3 million per day in the final months. [4] The New Zealand government bailed out Air New Zealand but not Ansett. [3]

When Virgin Blue appeared in 2000 with fares substantially below Qantas, Qantas faced a competitive threat on its most profitable routes. [2,3] Rather than match Virgin's prices across its own network, which would have destroyed its margins on full-service routes, Qantas launched Jetstar as a separate low-cost brand in 2004, with Alan Joyce as chief executive. [2,3]

The Jetstar strategy was precise: compete with Virgin Blue on price-sensitive leisure routes while maintaining Qantas's premium positioning on business and corporate routes. [10] The structural effect was to divide the market between Qantas Group brands, with Qantas serving corporate travellers and Jetstar serving leisure travellers, and leave Virgin competing against a two-brand adversary with shared infrastructure, fleet, and loyalty ecosystems. [10]

Jetstar has been able to capitalise on the continued absence of competitive pressure from another low-cost carrier.ACCC, Domestic Airline Competition Report, May 2025 [10]

The record is eight challengers. Zero sustained independent competitors. The only airline that has survived is Virgin Australia, and Virgin has done so by abandoning the low-cost model that originally made it a genuine competitive threat, repositioning as a mid-market carrier, going through voluntary administration during COVID, and accepting Bain Capital as a private equity owner. [11] It is now a competitor to Qantas in the conventional sense, but it is not a disruptor. The ACCC's own reports consistently describe it as part of the 'duopoly' that structures the market. [11]

Market power and brand loyalty explain part of why challengers fail. But there is a more fundamental structural barrier to competition in Australian aviation: the physical control of landing and take-off slots at Sydney Airport.

Sydney Airport operates under a movement cap of 80 flights per hour. [5,9] There are 1,360 movements per day. [9] At peak hours, when business travellers want to fly, when slots are most valuable, there is no spare capacity. [5,9] A new carrier cannot simply start flying Sydney routes during peak hours because there are no slots available. [5,8]

Who allocates those slots? From 1997 until April 2025, the answer was Airport Coordination Australia, a joint venture owned by Qantas and Virgin. [7] The two airlines whose market dominance created the need for a slot management system were, themselves, the managers of that system. [5,7]

The government outsources the management of the slots at Sydney airport to a company that's majority-owned by Qantas and Virgin. It is just unbelievable.Rod Sims, Former ACCC chair [5]

It's as plain as the nose on your face that Qantas is hoarding slots by cancelling sufficient flights to remain within the 80/20 rule.John Sharp, Rex Airlines deputy chairman, June 2023 [5]

The 80/20 rule allows an airline to cancel up to 20 per cent of its flights in a season without forfeiting its slots. [5,14] The accusation was that Qantas was strategically timing and rotating cancellations across its slot portfolio to maintain slot holdings while operating below capacity. [5,15] The effect: slots that could be reallocated to competitors were retained by the incumbent. [5] The ACCC-commissioned analysis by former Qantas chief economist Tony Webber found cancellation rates across all airlines remained higher than pre-pandemic averages. [15]

The government eventually acted. In February 2024, Transport Minister Catherine King announced reforms to the slot system: increased transparency, independent audits, civil penalties for slot misuse. [14] The 80/20 rule survived unchanged. [14]

More significantly, when the slot manager role came up for re-tender, King signalled that the Qantas-Virgin joint venture would face tough conditions if it won again. [7] It did not win. In February 2025, the government announced that Britain's Airport Coordination Limited, ACL, which manages slots at Heathrow, Gatwick, Dubai, and 75 other major airports globally, would take over from the incumbent from 1 April 2025. [7,8]

ACL's CEO was candid in his assessment of what he was inheriting. [7,8] He noted that Qantas and Virgin 'were not using their allocated capacity anywhere near the levels at overseas airports such as Heathrow.' [7] Under ACL's management, airlines face stricter use-it-or-lose-it enforcement. [8]

The 28-year arrangement in which the duopoly managed its own access constraints is over. [7] Whether ACL's independent management changes the actual allocation of peak slots, and opens space for new entrants, will not be known for some time. [8]

The slot system is the most visible structural barrier. There are others. [5,10,11]

Qantas operates an extensive network of regional and interstate routes. A challenger on the Sydney–Melbourne route faces not just direct competition but the disadvantage that many travellers want to connect through Sydney or Melbourne to other destinations. [10] Qantas can offer seamless connections across its network. A single-route entrant cannot. [10] This network depth is a competitive moat built over decades that cannot be replicated quickly or cheaply.

As this series will document in Article 5, Qantas Frequent Flyer has more than 15 million members, roughly 50 per cent of the Australian adult population. [10] A challenger airline cannot offer these members equivalent rewards. Points accumulated over years of Qantas flying are not transferable. Switching to a challenger means forfeiting accumulated status and reward seats. [10] The loyalty program is not just a consumer benefit. It is a structural retention mechanism that increases the cost of switching to a competitor.

Qantas holds approximately 80 per cent of the corporate travel market. [10] Corporate travel is the highest-margin segment: business travellers are price-inelastic, travel frequently, and fill the premium and business cabin seats that generate disproportionate profit. [10] Any challenger must either accept being excluded from this segment, competing only for leisure travellers who are more price-sensitive and less profitable, or build the corporate relationships, frequent flyer status recognition, and business lounge infrastructure that Qantas has developed over generations. [10]

Aviation is extraordinarily capital-intensive. Aircraft cost hundreds of millions of dollars. Maintenance facilities, trained crews, airport gates, and ground handling all require sustained investment. [3] A new entrant must fund losses during the period it is establishing routes and building load factors, often years, before reaching profitability. [3,11] Both Bonza and Rex ran out of that runway. Both faced aircraft delivery delays that compounded their cash positions. [11,13]

Australia's aviation duopoly is not the result of law. The Two Airline Policy was abolished in 1990. [1] It is the result of structural advantages so deeply embedded in the market that the same two-carrier structure has re-emerged every time it has been challenged, across 35 years and eight separate attempts. [2,3,11]

Each time a challenger appeared, fares fell. [2,11] Each time the challenger failed, fares rose again. [11] The ACCC documents this cycle precisely in its quarterly reports. [11]

The slot management system, run by the airlines themselves for 28 years, was one mechanism through which the physical infrastructure of competition was controlled. [5,7] Its replacement with an independent manager from April 2025 is a genuine reform. [7,8] Whether it is sufficient is another question: the slot system is one of several barriers, not the only one. [5,8]

Article 3 of this series examines a moment when competition could have entered the market from the outside, and the government blocked it.