Yes, I guess the game calls them flights. Each flight includes building your ship and then navigating through a random deck of “encounters”. Each flight involves a bigger ship and therefore more challenging encounters.
I can’t remember how large the ship is for the third flight but I remember it’s big enough that it takes quite some time to get through the third building round in an async game.
I’ll probably suggest folks do a two flight game for the ladder but as always leave it open to each table to decide to play the full game and/or add the expansion.