The operating carrier flies the aircraft
Its crew, aircraft and operating certificate govern the physical flight. The marketing carrier places its own code on that service for sales purposes.
Codeshares expand network visibility
An airline can list partner destinations in its timetable and website. That makes one-stop itineraries easier to sell under a familiar brand.
Through-ticketing can simplify connections
Baggage and ticketing can often be handled across both carriers under one itinerary. The exact process depends on the commercial and interline agreements behind the booking.
Passenger benefits may depend on which carrier sold the ticket
Seat selection, upgrades, lounge access and frequent-flyer earning can follow different rules on codeshare flights. Travelers should check both the operating and marketing carrier terms.
Airlines gain feed without duplicating routes
A long-haul airline can rely on a regional partner to distribute passengers beyond a gateway. The partner gains access to incoming traffic in return.
Several flight numbers do not mean several flights
Airport boards may display multiple codes for the same departure. The operating carrier and departure time are the clearest identifiers of the actual flight.
One flight can carry several airline flight numbers
The operating carrier flies the aircraft, while partner airlines sell seats under their own codes. To a customer, that can make one physical flight appear in several networks.
Codeshares expand saleable destinations cheaply
An airline can offer onward travel beyond its own route map without stationing aircraft and crews at every destination.
The commercial relationship can be shallow or deep
Some agreements simply place a partner code on selected flights, while broader partnerships coordinate schedules, loyalty benefits and sales.
Passenger service still follows the operating carrier in many areas
Check-in, baggage handling, onboard product and disruption handling can depend on which airline actually operates the flight, even when the ticket carries another brand.
Revenue is divided under commercial agreements
Partners determine how income from a through itinerary is allocated. Those arrangements can be complex and are not visible in the public fare.
Codeshare does not guarantee identical standards
Seat selection, lounge access, baggage and upgrade rules may differ between marketing and operating carriers. Travelers need to check the operating airline as well as the ticketing airline.
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