What is the difference between codeshare and interline agreement?

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.



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You can select a seat on some codeshare flights operated by other airlines. In that case, the system will guide you automatically.

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Codeshares allow us to sell seats on flights operated by other airlines. This means you can easily combine American and flights with other partner airlines to create a single itinerary to multiple destinations. Our codeshare agreements make booking, checking in, checking your bags and traveling more convenient.

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Essentially, a codeshare flight is an agreement between airlines to sell seats on each other's flights. This gives the appearance of airlines flying to more destinations. By doing so, the airlines typically share the revenue on that ticket.

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What to do when travelling on two separate tickets:
  1. Ask your Flight Centre agent to complete the booking on one PNR (reservation). ...
  2. Complete online check-in for all carriers 24 hours prior to travel and collect your boarding passes (either on your mobile device or by printing at home).


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However, Southwest's unique boarding process does not assign specific seats to travelers — a process that can be baffling for first-time travelers, infrequent flyers or those new to the airline.

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