Originally Posted by
altbg
I have done two same-day return flights recently and both times was automatically checked in for the return when checking in for the outbound. It was treated like a connection.
This, although it really depends on how long your layover is, mine were often <4 hours so it just checked me all the way through.
For some reason if you're trying to check bags the agent should be able to check it all the way through at the airport.