What is a fifth freedom flight?

What counts as a fifth freedom flight?

The freedoms of the air are the traffic rights that states exchange in air service agreements. The earlier freedoms are narrow: permission to fly over a country, permission to make a technical stop, permission to set down traffic in another state and permission to carry traffic back to the home state. The fifth goes further. It allows an airline to carry traffic between two points that are both outside its home country, provided the flight forms part of a service that starts or ends at home.

An abstract example shows how it works. An airline based in country A operates a service from A to B and onward to C. The B–C sector is a fifth freedom sector: the airline is not based in B or in C, and the passengers travelling only between B and C are buying a fifth freedom flight. The same aircraft began its journey in A, and passengers flying the whole way from A to C are not on a fifth freedom itinerary for that part of the trip.

The label follows the airline's nationality and the geography of the route, not the registration of the aircraft or the country selling the ticket. A single flight number covering A–B–C can contain a fifth-freedom sector inside one service, and the sector is often an intermediate stop or a point beyond the airline's own market rather than a destination it calls home.

Why do airlines fly fifth-freedom routes?

The right has to be granted, sector by sector, in the agreements the two governments concerned negotiate, so a fifth-freedom operation is a negotiated exception rather than a default. The commercial point is straightforward: a long service that already stops in a third country can sell seats on the stop-to-stop portion instead of carrying only passengers who travel the entire route. For the traveller, the result is a direct link between two cities that neither airline treats as a base, which can be useful when the alternative is a connection through a hub.

Because the sector exists inside someone else's bilateral arrangement, it can appear, change or disappear with the route rather than with the frequent flyer programme. A sector you can fly today may be re-routed later, and the carrier operating it may already differ from the carrier whose flight number is printed on the ticket.

Which programme pays miles on a fifth-freedom sector?

Nothing about the sector automatically earns miles. The programme being credited decides, and it decides on the basis of the operating carrier and the fare. Under the Singapore Airlines KrisFlyer terms, KrisFlyer miles are awarded on the actual distance travelled, calculated with the great circle distance formula from the airport of departure to the airport of arrival, plus any bonus that applies. [3] Where a trip contains connecting flights that require a change of flight number, the miles earned are calculated for each sector within the trip. [3] Because the formula runs between the two airports on the sector itself, a fifth-freedom leg is measured on its own length. [3]

The carrier side matters just as much. KrisFlyer awards miles for tickets on participating airlines, including Scoot, [3] and it does not award KrisFlyer miles on codeshare flights that are marketed by Singapore Airlines and operated by airlines that are not KrisFlyer partner airlines. [3] KrisFlyer also notes that accrual rates may vary between partner airlines and directs members to the online accrual table for the rate that applies. [3]

Credit is single-track. A KrisFlyer member is eligible for credit with one frequent flyer programme for each flight or transaction, and where a member tries to accrue with more than one programme for the same flight, the miles awarded for it are forfeited. [3] A fifth-freedom sector is no different from any other sector in that respect: pick the programme before you fly.

How do fifth-freedom flights affect award routing?

For an award search, a fifth-freedom sector behaves like any other segment: it occupies a connection, it needs its own award space, and its operating carrier has to be an airline your programme can book. What changes is the map. A sector can join two cities that look like an ordinary domestic or regional hop, so a search built around the airline's home hub may not surface it even though the flight exists.

KrisFlyer illustrates the carrier test: KrisFlyer miles can be used for award tickets, upgrade awards and redemption tickets on Singapore Airlines, Star Alliance and other partner airlines. [3] A fifth-freedom sector therefore fits a KrisFlyer award when the airline operating that sector is one of those carriers. Alliance membership and partner lists are the practical filter, and the sector's own availability sits on top of that filter.

Limits and exceptions

• Charter flights. No KrisFlyer miles are earned on tickets booked on charter flights. [3]
• Codeshare marketing. KrisFlyer does not award miles on codeshare flights marketed by Singapore Airlines and operated by non-KrisFlyer partner airlines, and it warns that individual airlines may also exclude accrual on certain flights, such as codeshare flights. [3]
• Elite miles. Elite miles, which count towards KrisFlyer Elite Silver and KrisFlyer Elite Gold, are likewise not awarded on codeshare flights marketed by Singapore Airlines and operated by non-KrisFlyer partner airlines. [3]
• Partner rates. Accrual rates can differ from one partner airline to another, so the same distance can produce different earnings depending on who operates the sector. [3]
• Miles as payment for a fare. Using KrisFlyer miles to pay for a cash fare is narrower than award redemption: KrisFlyer miles cannot be used to pay for a fare that includes a flight segment not operated by Singapore Airlines, such as a codeshare, interline or round-the-world segment. [3] Award redemption and part-payment for a revenue fare are separate features with separate conditions.
• Programme scope. The rules above are KrisFlyer's. Other programmes set their own conditions for the same sector, so a fifth-freedom flight that earns in one programme may earn nothing in another, and eligibility can also turn on the fare paid.

Frequently asked questions

Do you earn miles on a fifth freedom flight?

Only if the programme you credit awards miles on that operating carrier and fare. Under KrisFlyer, miles are based on the great circle distance between the departure and arrival airports, calculated sector by sector where a change of flight number is involved. [3]

Can a fifth freedom flight be booked with miles?

It can where the operating carrier is one your programme can book. KrisFlyer miles can be used for award tickets, upgrade awards and redemption tickets on Singapore Airlines, Star Alliance and other partner airlines. [3]

Does a codeshare fifth-freedom sector earn miles?

It depends on who operates it. KrisFlyer does not award miles on codeshare flights marketed by Singapore Airlines and operated by airlines that are not KrisFlyer partner airlines. [3]

Can I credit the same fifth-freedom sector to two programmes?

No. KrisFlyer allows credit with one frequent flyer programme for each flight or transaction, and miles claimed under more than one programme are forfeited. [3]

Related pages

Glossary: all frequent flyer terms. Concepts: award routing rules, interline agreement, fare rule, one-way award. Guides: airline alliances explained, award search workflow.

Sources

Sources accessed on 18 October 2026. The programme rules described here are Singapore Airlines KrisFlyer's; other programmes, including Emirates Skywards, British Airways Club, AAdvantage, Asia Miles and Miles & More, are not covered on this page.

1. KrisFlyer terms and conditions, checked 18 October 2026