What Is the Difference Between Codeshare and Interline?

An interline flight is an agreement between airlines to coordinate passengers with an itinerary that uses multiple airlines, without having to check in again or deal with their baggage at the stopover. Codeshare agreements is where airlines operate flights on behalf of another airline, using their flight code

What is an interline partner?

Interline is a relationship between airlines which allows one airline sells services to a customer that are provided by another airline. Airlines use interline to sell itineraries that they would otherwise not be able to serve alone.

What is the difference between codeshare partner and alliance partners?

While the exact terms vary with every partnership, I think the easiest way to sum it up is that an interline agreement is like a friendship, a codeshare agreement is like an engagement, a joint venture is like a marriage, and an alliance is like having a big family, with everyone sort of doing their own thing.