What does it mean when a flight number has one airline’s name but the flight is actually operated by another airline? (What is codesharing?) Both airlines have code-sharing agreement and operate and transport passengers each other. If you have a codeshare flight, the baggage regulation and check-in is handled by the operating airline. Was this article helpful? Can't find what you're looking for? Inquiry Form Related articles Can I add on baggage afterwards? What do I need to check in for my flight? How do I access and print my e-ticket? How much time prior to the flight departure should I be at the airport? How do I update my passport information in my Giamso Tours MY BOOKING?