Fifth Freedom Flights Explained: Airlines Flying Outside Their Home Country

The Freedoms of the Air: A Framework Built at Chicago

The international legal framework governing which airlines can fly where — and carry passengers between which countries — was established at the Chicago Convention of 1944, one of the most consequential multilateral agreements in aviation history. Convened in the final months of World War II, the Chicago Conference brought together representatives from 52 allied and neutral nations to design the regulatory architecture for what all parties recognised would be a massive postwar expansion of civil aviation. The result was the Convention on International Civil Aviation, still in force today, and a set of informal principles known as the "Freedoms of the Air" that define the traffic rights airlines may exercise between countries.

The Freedoms of the Air are not formal treaty articles but analytical categories that aviation lawyers, regulators, and economists use to describe different types of international traffic rights. Nine freedoms are commonly enumerated, though only the first five were discussed at Chicago; the remainder emerged from subsequent practice and academic analysis. Each freedom describes a different type of right an airline from Country A might wish to exercise in relation to Countries B and C.

The first freedom is the right of an airline to fly over a foreign country without landing — the right of innocent passage through airspace. The second freedom is the right to land in a foreign country for non-traffic purposes (refuelling, maintenance, emergency) without picking up or discharging commercial traffic. The third freedom is the right to carry passengers from the airline's home country to a foreign country. The fourth freedom is the right to carry passengers from a foreign country back to the airline's home country. The fifth freedom — the subject of this guide — is the right to carry passengers between two foreign countries on a flight that originates or terminates in the airline's home country.

• First freedom: overflight rights (transit through foreign airspace without landing).
• Second freedom: technical landing (fuel, maintenance, emergency; no traffic).
• Third freedom: carry passengers from home country to foreign country.
• Fourth freedom: carry passengers from foreign country to home country.
• Fifth freedom: carry passengers between two foreign countries, on a flight that connects to or from the airline's home country.
• Seventh freedom: carry passengers between two foreign countries on a flight that does not touch the home country (rare; usually available only for cargo).
• Eighth and ninth freedoms (cabotage): carry passengers within a foreign country; almost universally restricted.

Fifth Freedom Flights: Real-World Examples

Fifth freedom flights are more common than most passengers realise, and in some markets they are commercially significant enough to shape competitive dynamics and consumer choice on major international routes. The classic fifth freedom configuration involves a flight from Country A that makes a commercial stop in Country B, then continues to Country C — and is permitted to pick up passengers at Country B for carriage to Country C (and vice versa, on the return leg). This intermediate commercial stop is the defining feature of fifth freedom operations.

Qantas operates one of aviation's most famous fifth freedom routes: Sydney to London via Singapore (QF-1/2). Qantas, an Australian carrier, picks up passengers in Singapore (Country B) for carriage to London (Country C) on a flight that originates in Sydney (Country A). The Singapore-London segment is a fifth freedom operation: Qantas is carrying passengers between Singapore and the United Kingdom — both of which are foreign countries to Australia — under a bilateral agreement between Australia and the United Kingdom that grants Australian carriers fifth freedom traffic rights between certain intermediate points and the UK. This is commercially important: the SIN-LHR segment is one of the world's busiest city-pairs, and Qantas competes directly with British Airways, Singapore Airlines, and others on that segment by virtue of its fifth freedom right.

Emirates' operations provide extensive fifth freedom examples. Emirates frequently picks up passengers at intermediate stops on its ultra-long-haul routes — at Milan on a service between Dubai and New York, or at Bangkok on services between Dubai and Australian cities — and those passengers may purchase just the intermediate segment. An Italian passenger can buy a ticket solely for the Milan-to-New York leg on an Emirates flight that originates in Dubai: they are benefiting from Emirates' fifth freedom right to carry passengers between Italy and the United States on a service that begins in the UAE.

Continental Airlines (now United) operated a notable fifth freedom service between Guam (a US territory) and Japan, with fifth freedom rights to carry Japanese passengers to Honolulu and the US mainland. This operation depended on US bilateral agreements with Japan granting American carriers extensive Pacific traffic rights. Similarly, Singapore Airlines operated fifth freedom rights on its former Singapore-Frankfurt-New York service — US-Germany segments could be sold as standalone tickets — until point-to-point Singapore-New York service on the A350-900ULR made the one-stop configuration unnecessary from a passenger experience perspective.

Gulf carriers have been among the most aggressive users of fifth freedom rights in recent decades. Qatar Airways operates fifth freedom rights to carry passengers on its services between Doha and various European destinations, stopping at intermediate cities and allowing passengers to board or disembark at those intermediate stops. The commercial value of fifth freedom rights has made them a significant element of bilateral negotiations, with European carriers lobbying their governments to restrict fifth freedom grants to Gulf carriers whose low-cost, hub-subsidised operations they view as distorting competition on intra-European segments.

Bilateral Agreements: The Architecture of International Traffic Rights

International air services are governed primarily through bilateral air services agreements (ASAs) — country-to-country treaties that specify what traffic rights airlines of each nation can exercise in the other's territory and airspace, how many airlines can serve the market, what frequencies are permitted, and what pricing rules apply. The bilateral system was the dominant framework for international aviation regulation from the 1940s through the 1990s and remains the foundation of most international aviation even in the era of open skies and regional liberalisation agreements.

Traditional bilateral agreements were highly restrictive: they named specific airlines of each country that were permitted to serve specific city-pairs, at specific frequencies, with fares subject to governmental approval. The "predetermination" model — in which governments actively chose which airlines could fly — reflected Cold War-era assumptions about the relationship between national airlines and national sovereignty. The national airline was viewed as a strategic asset, and bilateral negotiations were conducted with the same diplomatic weight as trade or defence agreements.

The United States pioneered the liberalisation of bilaterals beginning with the Deregulation Act of 1978 and intensifying through the 1990s. The US "open skies" policy — promoted by the Clinton administration's Department of Transportation — offered bilateral partners unrestricted access to US territory for their carriers in exchange for equivalent access for US carriers. By 2025, the United States had signed open skies agreements with over 130 countries. Open skies agreements typically grant unlimited third, fourth, and fifth freedom rights to airlines of both parties, remove capacity and frequency restrictions, and eliminate governmental tariff approval — though seventh freedom rights (flights between two foreign countries without touching the home country) and cabotage rights (flying within a foreign country's domestic market) are rarely included even in open skies agreements.

The EU-US Open Skies Agreement (the "Open Skies Treaty" or "Air Transport Agreement"), signed in 2007 and expanded in 2010, created the world's most liberalised transatlantic aviation market. Before the agreement, the only US carriers permitted to land at Heathrow under the highly restrictive UK-US Bermuda II bilateral were American Airlines and United Airlines (the predecessors of today's carriers). After Open Skies, any US carrier could serve any UK destination from any US origin, and any EU carrier could serve any US destination from any EU point. The immediate consequence was dramatic: Delta, Continental, and others began Heathrow services they had been locked out of for decades.

Passenger Benefits: Why Fifth Freedom Rights Matter for Travellers

Fifth freedom operations create direct benefits for passengers through increased competition, more routing options, and sometimes lower fares. When multiple carriers hold fifth freedom rights on the same segment — as multiple carriers do on the Singapore-London, Dubai-New York, and Tokyo-Los Angeles segments — competition drives down fares and improves service quality in ways that a duopoly or monopoly between the two nations' carriers alone would not achieve.

The most tangible consumer benefit of fifth freedom flights is routing optionality. A passenger flying from Australia to Europe has meaningful choice: they can fly via Singapore on Qantas or Singapore Airlines, via Dubai on Emirates, via Doha on Qatar Airways, via Abu Dhabi on Etihad, via Hong Kong on Cathay Pacific, via Tokyo on Japan Airlines or ANA, or via numerous combinations. Each of these options involves fifth freedom rights at various intermediate points. The existence of multiple competing options on major international city-pairs — particularly thin intercontinental routes — would be dramatically reduced if fifth freedom rights were eliminated and airlines could only carry passengers between their own country and a foreign destination.

Fifth freedom intermediate stops can also provide passengers with access to lower fares or to routings that are not available on direct services. A passenger flying New York to Milan might find a cheaper fare on a Middle Eastern carrier's New York-Dubai-Milan service with the option to disembark in Milan, compared to a nonstop American or Alitalia service. The competition between the direct routing and the fifth freedom intermediate routing creates a fare benchmark that constrains the pricing power of direct-service carriers.

Fifth freedom rights are particularly valuable in markets where one country's aviation industry is underdeveloped — either because of regulatory restrictions, lack of capital, or a small domestic market — and cannot sustain frequent international service on its own. Pacific Island nations, many African states, and some Central Asian countries benefit from the international connectivity that fifth freedom and code-share arrangements enable: foreign carriers fill routes that local carriers cannot serve alone, connecting passengers from smaller markets to global aviation networks at reasonable frequencies.

The Future of Open Skies: Tensions, Reforms, and the Multilateral Dream

The bilateral system, despite decades of liberalisation, remains the foundation of international aviation regulation — and it is under increasing stress from several directions simultaneously. The rise of Gulf carriers (Emirates, Qatar Airways, Etihad) has provoked protectionist responses from European and North American legacy carriers, who argue that state subsidies to Gulf carriers distort competition and undermine the fair competition premise of open skies agreements. The EU has negotiated "comprehensive air transport agreements" with several Gulf states that include provisions on competition, subsidies, and market access that go beyond traditional open skies to address these fairness concerns.

Multilateral liberalisation — the dream of a global open skies regime that would allow any airline to fly any route without bilateral restrictions — has made limited progress. The ASEAN Single Aviation Market, modelled on the EU's single aviation market, has liberalised intra-ASEAN air services significantly since its 2015 implementation, allowing ASEAN carriers to serve any ASEAN airport from any other ASEAN airport. The African Single African Air Transport Market (SAATM), launched at the AU summit in 2018, aims to create a similar framework across Africa — an enormous prize given that intra-African connectivity is severely constrained by bilateral restrictions and high operating costs. Implementation of SAATM has been slower than hoped, with most African states not yet implementing the required liberalisation of their national aviation policies.

The EU's internal market provides the world's most advanced multilateral aviation liberalisation example. Any EU airline can fly any intra-EU route without restriction — this is effectively eighth and ninth freedom cabotage, the rights that bilateral agreements almost never grant. The EU model allows Ryanair, based in Ireland, to operate domestic flights within Spain, Germany, France, and Italy — services that a bilateral system would never permit. The commercial consequences have been profound: the EU single aviation market has produced the most competitive short-haul aviation market in the world, with the lowest fares per kilometre of any major region, driven by the ability of low-cost carriers to operate across all EU markets without regulatory discrimination.

Climate policy is emerging as a new dimension of international aviation regulation that intersects with bilateral frameworks. The EU's Emissions Trading System (ETS) applies to flights within the EEA and has been extended in modified form to flights departing from EEA airports. CORSIA (Carbon Offsetting and Reduction Scheme for International Aviation), the ICAO-administered global carbon scheme, is in its voluntary pilot phase through 2026 and mandatory phase from 2027. The interaction of carbon pricing with bilateral traffic rights — specifically whether countries will use carbon pricing as a trade barrier against carriers from non-CORSIA-compliant states — is a growing source of bilateral regulatory complexity that governments and airlines are only beginning to navigate.