What is an airline alliance?

An airline alliance is an agreement amongst several airlines to cooperate in the marketing and facilitation of flights, namely codeshares.

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Alliances are also very convenient in regards to frequent flyer programs. Members can often use their benefits not just with the airline they are enrolled with, but also its alliance partners.

What is the purpose of alliances?

Alliances benefit both the airlines and their passengers.

The partnerships within alliances can extend the flight networks that airlines offer, allowing passengers to book a trip to a far-away destination all on the same ticket.

How many alliances are there?

There are three main alliances:

Oneworld
Star Alliance
Skyteam

There are some notable airlines which do not participate in any alliance, such as Etihad Airways and Emirates.

Oneworld airlines:

American Airlines
British Airways
Cathay Pacific
Finnair
Iberia
Japan Airlines
Malaysia Airlines
Qantas
Qatar Airways
Royal Air Maroc
Royal Jordanian
S7 Airlines
SriLankan Airlines
Fiji Airways
Alaska Airlines

Star Alliance airlines:

Aegean Airlines
Air Canada
Air China
Air India
Air New Zealand
ANA (All Nippon Airways)
Asiana Airlines
Austrian
Avianca
Brussels Airlines
Copa Airlines
Croatia Airlines
EGYPTAIR
Ethiopian Airlines
EVA Air
LOT Polish Airlines
Lufthansa
Scandinavian Airlines
Shenzhen Airlines
Singapore Airlines
South African Airways
SWISS
TAP Portugal
THAI
Turkish Airlines
United Airlines

Skyteam airlines:

Aeroflot
Aerolíneas Argentinas
Aeroméxico
Air Europa
Air France
Alitalia
China Airlines
China Eastern Airlines
Czech Airlines
Delta Air Lines
Garuda Indonesia
Kenya Airways
KLM
Korean Air
Middle East Airlines
Saudia
TAROM
Vietnam Airlines
XiamenAir