Two Airlines Policy
The Two Airlines Policy was an Australian government framework that restricted most scheduled interstate passenger services to two designated domestic airlines from the 1950s until aviation deregulation in 1990.
Last updated October 14, 2026
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Overview
The Two Airlines Policy, also called the Two Airlines Agreement, was a long-running Australian aviation policy that structured the domestic market around two principal carriers. For most of its existence, the permitted operators on routes linking state capitals, and on selected services linking capitals with nominated regional centres, were the privately owned Ansett Airlines and the government-owned Trans Australia Airlines (TAA). The arrangement was not simply an informal commercial understanding. It rested on legislation, licensing practices and administrative controls that made entry into the most important interstate passenger markets difficult or impossible for other airlines. The policy developed from the postwar decision to establish a national government airline. The Chifley governments created TAA through legislation passed in 1945, with operations commencing in 1946. TAA was initially intended to become a monopoly national carrier by absorbing routes operated by Australian National Airways and other private airlines. That broader ambition was challenged successfully in two High Court cases, preventing the government from eliminating private competition altogether. The resulting political and legal environment led to a regulated form of competition rather than a complete state monopoly. The framework was formally associated with the Civil Aviation Agreement Act 1952, enacted during the Fifth Menzies Ministry. Its practical structure became clearer in 1957, when Ansett acquired the failing Australian National Airways. This left Ansett as the principal private rival to TAA and created the effective two-carrier system that endured for nearly four decades. Smaller regional airlines could continue serving regional routes and certain links between regional centres, but they generally could not operate the core intercapital services reserved for the two major carriers. The policy sought stability and parity between the two designated airlines. The carriers commonly operated comparable fleets and equipment, carried roughly similar numbers of passengers, and charged similar fares. On competing routes, their scheduled departures were often separated by only a few minutes, with Ansett typically departing before TAA. This pattern gave travellers a choice of carrier while limiting the scope for aggressive price competition or the rapid entry of new operators. Supporters viewed the arrangement as a way to maintain reliable national air services and prevent destructive competition; critics regarded it as an anti-competitive legal barrier that protected an entrenched duopoly. The restrictions occasionally produced disputes and attempted workarounds. In 1970, East-West Airlines briefly connected an existing Sydney–Albury service with a new Albury–Melbourne sector, thereby creating a nominal through service between Sydney and Melbourne while retaining the regional stop. The arrangement demonstrated how smaller airlines could test the boundaries of the system without receiving unrestricted access to the major intercapital market. Freight was treated separately in later years: in 1966, Ipec began an interstate courier operation using flights from Brisbane to Cowra to connect with road transport to and from Melbourne, but the service was considered contrary to the policy and ceased. In 1981, freight services were removed from the policy's scope, allowing Ipec to operate services between mainland Australia and Tasmania. The Two Airlines Policy ultimately weakened as Australian governments moved toward aviation deregulation. It fell into abeyance in 1990 and was formally disbanded on 30 October 1990. The change opened the main domestic market to additional competitors, including Compass Airlines, Impulse Airlines and Virgin Australia at different stages of the post-policy period. The policy remains significant in Australian transport history because it shaped the development, fleets, fares and competitive behaviour of the country's two dominant domestic airlines for most of the second half of the twentieth century.
History
The origins of the Two Airlines Policy lie in the Australian government's postwar effort to create a national air carrier. The Chifley governments passed legislation establishing Trans Australia Airlines in 1945, and TAA began operations in 1946. The original ambition was broader than a duopoly: TAA was intended to become a monopoly national carrier by taking over the routes flown by Australian National Airways and other private operators. Private aviation interests challenged this approach in two High Court cases and successfully prevented the government from creating an unrestricted statutory monopoly. The compromise that emerged was a heavily regulated competitive system. The Fifth Menzies Ministry formalized the framework through the Civil Aviation Agreement Act 1952. The policy limited the principal scheduled services between Australian state capitals, and between capitals and selected regional centres, to two designated airlines. Regional operators retained room to fly between regional airports and on some regional links, but access to the most commercially important interstate routes was restricted. The arrangement became a practical duopoly in 1957. Australian National Airways was in financial difficulty and was acquired by Ansett. With Ansett as the major private operator and TAA as the government-owned carrier, the market had two principal airlines capable of serving the intercapital network. Governments continued this structure for almost four decades. Although the two companies were separate, the regulatory environment encouraged them to remain closely matched. They carried approximately similar numbers of passengers, charged similar fares and operated broadly comparable fleets and equipment. On routes where both were scheduled, departures were often only about five minutes apart, with Ansett generally leaving first. The restrictions also affected airlines that did not seek to become full intercapital competitors. In 1966, Ipec tried to establish an interstate courier network using an air sector from Brisbane to Cowra and road connections to and from Melbourne. Authorities considered the arrangement inconsistent with the policy, and the service stopped. In 1970, East-West Airlines used a different approach by connecting an established Sydney–Albury operation to a new Albury–Melbourne sector. The resulting service offered a nominal Sydney–Melbourne through journey while retaining the regional stop, illustrating the narrow opportunities available to smaller carriers. Freight was later separated from the passenger-focused restrictions. In 1981, freight services were removed from the policy's coverage, permitting Ipec to operate services between mainland Australia and Tasmania. This modification did not immediately dismantle the passenger duopoly, which remained the defining feature of the domestic market. By the late 1980s, wider economic and regulatory reforms created momentum for aviation deregulation. The Two Airlines Policy fell into abeyance in 1990 and was formally disbanded on 30 October of that year. Deregulation opened the major domestic routes to new entrants, including Compass Airlines, Impulse Airlines and Virgin Australia in subsequent periods. The policy therefore ended not through the replacement of one designated pair by another, but through a structural change toward open competition. Its legacy is a domestic airline market shaped for decades by state regulation, controlled entry, matched incumbents and the close relationship between public policy and the development of Australian carriers.
- 1990
Deregulation brings the policy to an end
[1]The policy fell into abeyance during Australian aviation deregulation and was formally disbanded on 30 October 1990.
- 1981
Freight is removed from the policy
[1]The scope of the restrictions was reduced by excluding freight services, allowing Ipec to operate mainland-to-Tasmania services.
- 1970
East-West Airlines operates a limited intercapital workaround
[1]East-West connected Sydney–Albury and Albury–Melbourne sectors, creating a restricted nominal through service between Sydney and Melbourne.
- 1966
Ipec freight operation is discontinued
[1]An Ipec interstate courier service using an air-and-road connection was considered contrary to the policy and ceased operating.
- 1957
Ansett acquires Australian National Airways
[1]Ansett's acquisition of the failing Australian National Airways made it the principal private competitor to TAA and consolidated the two-airline structure.
- 1952
Formal establishment through the Civil Aviation Agreement Act
[1]The Civil Aviation Agreement Act supplied the principal formal legal framework for restricting major interstate passenger services to two designated airlines.
- 1946
Trans Australia Airlines begins operations
[1]TAA commenced operations and became the government-owned carrier at the centre of Australia's developing domestic aviation system.
- 1945
Legislation establishes Trans Australia Airlines
[1]The Chifley government passed legislation establishing TAA as a government national airline, initially with ambitions for a monopoly position.
Products and positioning
A regulated national aviation framework emphasizing service continuity and parity between two designated domestic carriers, while restricting entry and limiting direct competition on major interstate routes.
Regulated domestic aviation service · 1952
Intercapital passenger services
The core activity governed by the policy was scheduled passenger flying between Australian state capitals. These commercially important routes were reserved principally for Ansett Airlines and Trans Australia Airlines, creating a regulated duopoly. The framework encouraged the two carriers to maintain similar fares, passenger volumes, schedules, fleets and onboard equipment rather than compete through unrestricted market entry or sustained price undercutting.
Regulated domestic aviation service · 1952
Capital-to-regional passenger services
The policy also applied to services between state capitals and nominated regional centres. Smaller regional airlines could operate some regional-to-regional and regional-link services, but the major capital connections remained subject to the two-airline framework. This distinction allowed a limited regional aviation sector to continue while protecting the designated carriers' position on the principal domestic network.
Air freight · 1981
Interstate air-freight services
Freight services were initially affected by the policy, as demonstrated by the discontinuation of Ipec's Brisbane–Cowra operation connected to road transport serving Melbourne. In 1981, freight was removed from the policy's scope. That change permitted Ipec to establish services between mainland Australia and Tasmania without the passenger-route restrictions applying in the same way.
Brand decisions
1990
Dismantle the regulated two-airline systemStrategyBackground
Australian aviation policy shifted toward deregulation and greater market entry after decades of regulated domestic competition.
Action taken
The Two Airlines Policy fell into abeyance and was formally disbanded on 30 October 1990.
Aftermath
The main domestic market opened to additional competitors, including Compass Airlines, Impulse Airlines and Virgin Australia in subsequent periods.
1981
Exclude freight services from the policyStrategyBackground
The restrictions had affected attempts by courier operators to build interstate air-and-road networks.
Action taken
Freight services were removed from the scope of the Two Airlines Policy.
Aftermath
Ipec was able to operate services between mainland Australia and Tasmania, although passenger intercapital restrictions remained in place.
1957
Ansett acquires Australian National AirwaysM&ABackground
Australian National Airways was failing, and its position in the private domestic market needed to be distinguished from the government-owned TAA.
Action taken
Ansett purchased Australian National Airways and became the principal private rival to TAA.
Aftermath
The acquisition consolidated the effective Ansett–TAA duopoly that continued until deregulation.
1952
Formalize a two-carrier domestic aviation structureStrategyBackground
After legal challenges blocked the proposed government monopoly for TAA, Australian aviation policy settled on regulated competition between a government carrier and a principal private carrier.
Action taken
The government enacted the Civil Aviation Agreement Act, restricting key intercapital and nominated capital-to-regional services to two designated airlines.
Aftermath
The legislation created the formal basis for the system later dominated by TAA and Ansett.
Recent events
- 1990
Australian domestic aviation deregulation ends the two-carrier framework[1]
Regulation · Other
The policy fell into abeyance with Australian aviation deregulation and was formally disbanded on 30 October 1990, allowing new competitors to enter major domestic markets.
- 1990
New competitors enter Australian domestic aviation after deregulation[1]
Product launch · Regulation
The post-policy market permitted additional airlines, including Compass Airlines, Impulse Airlines and Virgin Australia at different stages, to compete with the established domestic carriers.
- 1981
Freight services are removed from the policy's scope[1]
Regulation
The policy was amended so that freight services were no longer covered, enabling Ipec to operate services between mainland Australia and Tasmania.
- 1970
East-West Airlines tests the limits of the intercapital restrictions[1]
Regulation · Other
East-West Airlines linked its established Sydney–Albury service with an Albury–Melbourne sector, creating a limited nominal through service between Sydney and Melbourne without operating a conventional nonstop intercapital route.
- 1966
Ipec interstate freight service is ruled contrary to the policy[1]
Regulation
Ipec began a Brisbane–Cowra air-freight operation connected to road transport serving Melbourne, but the service was deemed to breach the policy and was discontinued.
- 1957
Ansett acquires Australian National Airways and becomes TAA's principal rival[1]
M&A · Regulation
The failure of Australian National Airways and its acquisition by Ansett left Ansett and the government-owned Trans Australia Airlines as the two dominant carriers in the regulated domestic market.
- 1952
Civil Aviation Agreement Act establishes the formal framework for the Two Airlines Policy[1]
Regulation
The Civil Aviation Agreement Act, enacted under the Fifth Menzies Ministry, provided the principal formal basis for the regulated two-airline structure in Australian domestic aviation.
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