US Airways Group Inc. and Swiss International Air Lines Ltd. signed a codeshare agreement, an airlines alliance allowing passengers to transfer between the two airlines in Zurich and connect to 10 European destinations.
The routes available through Zurich include Geneva; Nice, France; Athens, Greece; Vienna, Austria; Dusseldorf, Hanover, Nuremberg and Stuttgart, Germany; Luxembourg and Bucharest, Hungary.
Under a code sharing agreement participating airlines can present a common flight number for several reasons, including:
Connecting flights - this provides clearer routing for the customer, allowing a customer to book travel from point A to C through point B under one carrier's code, instead of a customer booking from point A to B under one code, and from point B to C under another code. This is not only a superficial addition as cooperating airlines also strive to synchronize their schedules and coordinate luggage handling, which makes transfers between connecting flights less time-consuming.
Flights from both airlines that fly the same route - this provides an apparent increase in the frequency of service on the route by one airline
Perceived service to unserved markets - this provides a method for carriers who do not operate their own aircraft on a given route to gain exposure in the market through display of their flight numbers.