What is a codeshare agreement and why should travellers care about them?

Here are the pros and cons of these airline partnerships

Emirates and United Airlines now codeshare. It allows travellers to make long distance flights, such as Dubai to Hawaii, under one ticket. Photo: David Buerk Photo
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This week's aviation headlines have been filled with news of a codeshare agreement between two of the world’s biggest airlines.

Emirates and United Airlines announced their new partnership in Washington on Wednesday.

Emirates airline's president Tim Clark said the move was “a significant partnership that will unlock tremendous consumer benefit" and bring the UAE and the US closer.

Scott Kirby, chief executive at United Airlines, added: “This agreement unites two iconic, flag carrier airlines who share a common commitment to creating the best customer experience in the skies."

But how exactly does a partnership between two airlines impact travellers and why should holidaymakers care about codeshare announcements?

What is a codeshare?

Codesharing is an agreement between two or more airlines to sell seats for the same flight.  Reuters

Have you ever purchased a flight ticket with one airline, only to arrive at the airport to discover you’re actually flying with another airline? If so, chances are you’ve just experienced a codeshare partnership.

Codesharing is an agreement between two or more airlines to sell seats for the same flight. And, while multiple airlines can then issue their own tickets for a codeshare flight, only one airline will actually operate the plane and provide the crew. This is why travellers might find themselves flying with an airline other than the originally booked one.

Why do airlines codeshare?

Most major airlines have codesharing partnerships with other airlines, and there are myriad reasons why.

As a business arrangement between airlines, a codeshare can help expand into markets where they might not be as well known, extend their network coverage for a greater global reach and ultimately offer more opportunity to increase profits by selling tickets on more flights.

How do codeshare agreements impact travellers?

Travellers flying on a codeshare can book all their travel on one ticket and will only need to collect baggage at their final destination. Photo: Changi Airport Group

While codeshare agreements sound like industry jargon, there are a few reasons why travellers might want to know about them.

Perhaps the most obvious advantage is being able to earn frequent flyer miles, even when flying on a flight operated by another carrier.

For instance, a member of the Etihad Guest frequent flyer programme flying on Swiss Airways would not normally earn miles. However, as these two airlines have a codeshare, passengers earn credit for those miles.

To be eligible, the flight booked needs to have been sold and marketed by Etihad — an easy way to know if this is the case is to look for the airline's code at the start of the flight number. In this example, if the flight number starts with EY — then it's eligible for Etihad miles.

Andrew Levy, chairman and chief executive officer of Avelo Airlines, holds a commemorative ticket for the inaugural flight of Avelo Airlines from Hollywood Burbank Airport (BUR) to Charles M. Schulz-Sonoma County Airport in Santa Rosa (STS) on April 28, 2021 in Burbank, California. Avelo Airlines begins low-cost carrier service with a fleet of Boeing Co. 737 aircraft as leisure travel resumes after the Covid-19 pandemic stunned the global airline industry. / AFP / Patrick T. FALLON

Another big advantage is being able to book an entire trip on one ticket. This is especially useful for multiple connections. When no codeshare exists, travellers often have to book separate tickets with individual airlines for each leg of a lengthy journey.

This means collecting baggage at each connection point, paying attention to the different weight allowances for each airline and checking-in at each airport. If there's a codeshare, all flights are booked on one ticket, with check-in once. Then the collection of luggage happens at the end of the journey.

Codesharing also allows travellers to book flights on a platform they are familiar with to destinations not typically operated to by specific airlines. This is the case with Emirates's new agreement as travellers can book flights from Dubai to Hawaii on Emirates, or from New York to Karachi with United Airlines.

Finally, premium passengers flying on a codeshare ticket can access more lounges, which can be useful flying from or through a destination by using the lounge belonging to the partner airline.

What are the disadvantages of flying on a codeshare?

Travellers flying on a codeshare ticket are less likely to get a free upgrade. Photo: Etihad Airways

Whether flying on a codeshare or not, there are a couple of drawbacks for travellers booking such tickets.

The main disadvantage is that codeshare flights can be difficult to rebook or alter should travel plans change. This is because the airline passengers originally booked with doesn't have the final authority to make that change, instead it must coordinate with the operating airline to update any itinerary.

Getting a free upgrade when flying on a codeshare ticket is also difficult. This is because as much as airlines are working in a partnership, they are still competitors and each airline would much rather prioritise a customer that has given money directly to them, than paid airfare to their competition.

How do I know if I’m booking a codeshare ticket?

MAHE, SEYCHELLES, Mar. 10, 2015:  
An Air Seychelles staff work at the check-in desk at the airport in Victoria, the Republic of Seychelles' capital, on Mahe island, as seen on on Tuesday, Mar. 10, 2015.  Etihad Airways signed a deal with Seychelles government in January 2012, acquiring 40-percent stake in Air Seychelles. Seychelles, with a population of just over 90,000 - the smallest of any African states - is a member of the African Union. (Silvia Razgova / The National)  (Usage: undated, Section: BIZ, Reporter: Shereen Elgazzar) *** Local Caption ***  150310-Seychelles0577.jpg

Airlines don’t hide the fact that a flight they are offering to sell is a codeshare.

During the booking process, double check the operator for the flight. This information will be listed in the booking confirmation, as well as on the ticket.

If booking a codeshare flight, make sure to go to the correct terminal to check-in. This might mean going to the terminal for the operating airline, not the airline that's been booked with.

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Updated: September 15, 2022, 2:55 PM