Is it possible to book a one way AND a roundtrip flight at the same time online?

-Can you have your cake and eat it too? No.



You could bake two cakes so that you could have one and eat the other.



Please elaborate on the circumstances of your problem. Are you trying to book one-way for one person and round trip for another in the same transaction? No, I don't think you can do that, but you can do it in two transactions.