Which airline am I actually flying on a codeshare booking?

At a glance#

What a codeshare is and why it exists#

Hardly any detail on a ticket produces misunderstandings as reliably as the flight number. It says who sold the ticket, not who flies, and that difference decides cabin, baggage, seating and who to talk to when something goes wrong.

A codeshare is a selling arrangement. One airline assigns its own flight number to a flight another airline operates, which lets it offer destinations it does not serve and sell through itineraries over routes where it has no aircraft. Traffic rights play a part as well: not every airline may fly every route itself, and the arrangement carries a destination in its schedule anyway. Distribution is the third motive, because corporate customers and agencies frequently book inside one programme, and a codeshare keeps those bookings in that system even when another airline flies.

For travellers that creates one advantage and one blurred edge. The advantage is the through booking with every entitlement attached to it. The blurred edge is expectation: booking with a particular airline suggests its cabin, its service and its rules, and what arrives is the operating carrier’s.

Who sets which rule#

The cabin#

Two airlines are involved in every codeshare: the selling one, whose number is on the ticket, and the operating one, which provides the aircraft. Almost every practical question follows the second.

Aircraft, legroom, catering, entertainment, crew and the language on board come from the operating carrier. The cabin is the most visible difference and the one that surprises most, and on long-haul it matters considerably, since two airlines in the same alliance can differ substantially in their seating. Short routes flown by regional partners are the extreme case: almost the entire schedule is operated by partners, and the cabin differs noticeably from the main airline’s.

A particular cabin is therefore worth checking before booking. The line naming the operating carrier sits in the booking flow and on the confirmation, usually in small type under the flight time, and once found it is easy to spot in every confirmation afterwards.

Status follows the same split: it works towards the operating carrier as far as that carrier recognises it, which inside an alliance is routine and outside one rare, so a tier that counts with the selling airline may count for little on the partner’s aircraft.

Baggage and seating#

Baggage rules follow the operating carrier as a rule, although on connecting itineraries the rule of the first segment frequently governs the whole trip.

Seats are usually offered only on the operating carrier’s site. Booking through the selling airline means needing the operating carrier’s record locator, which is not always on the confirmation. It can be obtained by phone; without it seat selection waits until the airport. Families feel this most, because seats together often need that extra step, and skipping it means sitting apart, as seat selection fees describes.

The aircraft type sometimes changes between booking and departure. On a codeshare the selling airline occasionally learns of it later than the traveller does, and a seat reservation lapses without notice. A look at the seat map a few days before departure catches it in time.

Booking class, messages and check-in#

The booking class is assigned by the selling airline and determines the mileage credit in your own programme, so the same cabin can be worth different amounts depending on who sold it, as reading fare rules describes. The credit follows the booking class and your own programme’s rules, whatever logo is printed on the ticket.

Reminders, check-in notices and changes are generally sent by the operating carrier, which knows only the contact details the selling airline passed on. A phone number left with the selling airline is the one that reaches you, so it belongs there. Some airlines also refuse online check-in for codeshare bookings on their own site and refer travellers to the operating carrier, and discovering that on the morning of departure costs the early seat choice and a longer queue.

Worked example: the same flight, two ways to book it#

A flight is operated by airline B and additionally sold by airline A under its own number.

On price, the same seat is often cheaper with the operating carrier, because an intermediary step falls away. Miles explain why codeshares get booked anyway, since a traveller collecting in a particular programme books where the credit lands, as airline alliances describes.

Add a connection and the picture shifts markedly towards booking with A, because the through itinerary comes with it. Take the same flight as the second leg of a journey that starts with airline A. Booked with A, both legs sit on one ticket, the bag is checked through, and a delay on the first leg is A’s problem to solve. Booked separately with B, the traveller holds two contracts and carries the risk of the connection alone. The baggage line then matters most. Where the first segment is operated by an airline with a generous free allowance, that rule often governs the whole trip and can be worth more than the price difference.

The split of contacts is the most awkward part in daily use. Booking questions and changes go to the airline the ticket was bought from, disruption claims to the operating one, and calling the wrong one costs an hour.

The main advantage: one booking#

A codeshare sits on one ticket, as long as every segment was booked together, and every rule of a through booking therefore applies: minimum connecting time, free rebooking after a missed connection, and through-checked baggage.

The single ticket is what separates a codeshare from two individually booked flights on the same airlines. A codeshare segment bought on its own next to another ticket is simply one more separate ticket. Two tickets are two contracts, as separate tickets describes, and for tight connections that is the decisive point: a codeshare itinerary with an hour of connection time is safer than two separate tickets with three.

Liability works the same way. On a through booking across several airlines the carriers are jointly responsible for baggage, and the traveller does not have to establish which segment lost it, as baggage liability describes.

Some airlines sell train journeys under their own flight numbers. The same logic applies there: one booking, another company delivering, and rules that come from the railway. Baggage, seating and delays on such a segment are the railway’s business, whatever number the ticket carries.

Where a codeshare gets in the way#

Care during a disruption and any compensation follow the operating carrier and the place of departure, as meals and hotels during a disruption describes. The name on the ticket plays no part.

The arrangement carries drawbacks in several places:

• When the cabin matters. The operating carrier decides it, whatever name is on the ticket.
• For seat selection. It frequently works only via a detour.
• On price. The same seat is often cheaper booked directly.
• On award bookings. Some programmes exclude codeshares from award pricing, and the flight is then bookable only through the operating carrier.
• During a disruption. Messages come from the operating carrier, and a traveller registered only with the selling airline receives them late or not at all.
• In search results. The same flight appears several times under different numbers, and two entries for one aircraft easily look like two options.

Special requirements suffer most from the handover. Wheelchair assistance and special meals are requested with the selling airline and have to be passed to the operating one, and that handover is where such requests most often disappear. A second confirmation with the operating carrier is worth the call.

When it is not worth booking a codeshare#

On a connecting itinerary a codeshare is almost always the better choice, and on a single flight almost never. That rule of thumb covers most cases without any arithmetic. A single flight without a connection gains nothing from a codeshare. There is no chain to protect, and the direct price is usually better.

A traveller who collects with the operating carrier anyway books directly too, because the detour through the selling airline returns nothing. The same goes for a particular cabin: it is booked where it is sold, after checking who flies. Awards need their own check. Before booking a codeshare with points, your own programme’s rules decide whether it prices at all, as partner awards describes.

The exception is narrow. A single codeshare flight can still make sense when it is the only way to earn in the programme you collect in, and the price difference is then what that credit costs.

What applies at the airport#

Check-in happens with the operating carrier. Its desks stand in the terminal, its kiosks know the booking, although the selling airline’s record locator does not always work there, and it issues the boarding pass, on which the note about the operating carrier appears. That note is the fastest way to find the right queue. The departure board shows the operating carrier’s flight number, so searching for your own number can be in vain. Very high numbers frequently indicate a codeshare, because an airline’s own flights carry lower ones.

During a disruption the operating carrier is the contact. It has staff on site and it decides the rebooking, as flight cancelled, what now describes.

With several airlines involved, a short note before the trip pays off: which number applies to which segment, where check-in happens and which record locator belongs where. Two lines remove every search on the day of travel, and regulars on a route know the carriers after two trips and book directly wherever it is cheapest.

The most common mistakes#

• Treating the flight number as the aircraft. The number says who sold the seat; the line about the operating carrier says who flies.
• Queuing at the wrong desk. Check-in belongs to the operating carrier.
• Forgetting seat selection. The operating carrier’s record locator unlocks it, and a phone call gets it.
• Contacting the selling airline about a disruption. Claims go to the operating carrier.
• Booking a single flight through the codeshare. Booked directly it is usually cheaper.
• Not checking award rules. Some programmes exclude codeshares entirely.

Related topics#

• Airline alliances
• Separate tickets
• Direct vs OTA
• Partner awards
• Missing a connection
• Through-checked baggage