---
title: "Which airline am I actually flying on a codeshare booking?"
description: "In a codeshare one airline sells seats on another airline's flight under its own flight number."
url: "https://benefitsystems.io/en/knowledge/codeshare"
lang: "en"
category: "Booking and flight search · Booking"
domain: "reise"
pillar: "booking-and-flight-search"
status: "entwurf"
published: "2026-09-18"
reviewed: "2026-09-23"
type: "Artikel"
---

# Which airline am I actually flying on a codeshare booking?

> **Entwurf.** Dieser Beitrag erfüllt die Redaktionsregel noch nicht vollständig und ist nicht indexiert.

In a codeshare one airline sells seats on another airline's flight under its own flight number. The booking sits with one and the flying is done by the other, and cabin, baggage rules and seat selection follow the airline that actually operates the flight.


## At a glance

| Question | Responsible |
|---|---|
| Aircraft and cabin | operating carrier |
| Baggage rules | usually operating, on connections often the first |
| Seat selection | operating carrier |
| Miles and status | your own programme, where an agreement exists |
| Changes | selling airline |
| Disruption claims | operating carrier |

## 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](/en/glossary/single-reservation) 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](/en/glossary/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](/en/glossary/seat-pitch), 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](/en/glossary/booking-reference), 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](/en/seat-selection-fees) describes.

The [aircraft type](/en/glossary/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](/en/glossary/fare-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](/en/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.

| Question | Booked with A | Booked with B |
|---|---|---|
| Aircraft and cabin | from B | from B |
| Price | frequently higher | frequently lower |
| Seat selection | via a detour | directly |
| Baggage rule | usually from B | from B |
| Miles | under A's programme | under B's programme |
| Contact for changes | A | B |

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](/en/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](/en/glossary/re-routing) after a
[missed connection](/en/glossary/misconnection), and
[through-checked baggage](/en/glossary/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](/en/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](/en/glossary/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](/en/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](/en/duty-of-care) 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](/en/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](/en/flight-cancelled-what-to-do) 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](/en/airline-alliances)
- [Separate tickets](/en/separate-tickets)
- [Direct vs OTA](/en/direct-vs-ota)
- [Partner awards](/en/partner-awards)
- [Missing a connection](/en/misconnections)
- [Through-checked baggage](/en/through-checked-baggage)

## Frequently asked questions

### What is a codeshare?

One airline sells seats on another airline's flight under its own number. The ticket carries one name, the aircraft belongs to the other.

### How do I recognise one?

By the line saying the flight is operated by another carrier. It appears in the booking flow and on the confirmation, usually in small type.

### Which baggage rules apply?

As a rule those of the operating carrier, and on connecting itineraries often those of the first segment. That question decides the free allowance and the fees.

### Where do I check in?

With the operating carrier, meaning wherever the aircraft comes from. The selling airline's record locator does not always work there.

### Do miles credit to my own programme?

Usually yes where an agreement exists. The amount follows the booking class and your own programme's rules rather than the logo on the ticket.

### Does my status apply?

Status works towards the operating carrier as far as it recognises it. Within an alliance that is routine; outside one it is rare.

### Who do I complain to?

For disruption claims the operating carrier. For booking questions the airline the ticket was bought from.

### Is a codeshare one booking?

Yes, as long as every segment sits on one ticket. That is the decisive difference from two separately booked flights.

### Can I choose seats?

Frequently only on the operating carrier's site. Without access there the choice waits until the airport or does not happen.

### Why do codeshares exist at all?

They let an airline offer routes it does not fly. For travellers the result is a larger network with through bookings.

### Is a codeshare more expensive?

Not inherently. The same seat is frequently cheaper with the operating carrier, because an intermediary step falls away.

### What about award bookings?

Some programmes exclude codeshares from award pricing. The flight is then bookable only through the operating carrier.

## Sources

- [OAG Aviation: Airline Codeshares: An Insider's Guide](https://www.oag.com/blog/airline-codeshares-an-insiders-guide)
- [Wikipedia: Codeshare agreement](https://en.wikipedia.org/wiki/Codeshare_agreement)
- [Codeshare flight means|ANA](https://www.ana.co.jp/en/jp/guide/plan/codeshare/)
- [American Airlines: Codeshare flights and partner airlines](https://www.aa.com/web/i18n/travel-info/partner-airlines/codeshare.html)
- [Alaska Airlines: Codeshare Info](https://www.alaskaair.com/content/travel-info/before-your-trip/codeshare-information?srsltid=AU7gw4WbxmauivrQ-U1zCMDNmAfP5hMbhwuVbiqpd9CzzGGhWp0Y9sDX)