"Baggage regulations for checked baggage on journeys operated by several airlinesWhen booking a journey with more than one airline, the baggage regulations of the airline flying the ​most significant route of the itinerary (usually the longest geographical route), and under whose flight number this route was booked, shall apply. For these purposes it is irrelevant which airline actually operates the flight.

The baggage regulations always apply up to the point at which you interrupt your journey for more than 24 hours (stopover).

Example: you have booked a round-trip flight from Vienna to Johannesburg with connections in Munich and Frankfurt.

Your outbound flight:

• From Vienna to Munich with flight number OS 115 (OS = Austrian Airlines), operated by Austrian Airlines.
• Continue without a stopover from Munich to Johannesburg with flight number LH 9542 (LH = Lufthansa), operated by South African Airways.

The baggage regulations for your outbound flight therefore comply with Lufthansa’s baggage regulations.

Your return flight:

• From Johannesburg to Frankfurt with flight number SA 7573 (SA = South African Airways), operated by Lufthansa.
• Continue without a stopover from Frankfurt to Vienna with flight number OS 7260 (OS = Austrian Airlines), operated by Lufthansa.

The baggage regulations for your return flight therefore comply with South African Airways’ baggage regulation."