In most cases, you'll receive your boarding pass for your connecting flight already when you check in for your first flight. This means you don't have to check in again for your next flight. If you haven't received it, you can go to the transfer desk or kiosk of the airline you're flying with to collect it.

You are usually automatically checked in for a connecting flight if both legs were booked as a single itinerary (on the same ticket). When you check in for your initial flight—whether online, via an app, or at the airport kiosk—the system typically issues boarding passes for all subsequent segments of that journey. This is standard for major airline alliances like Star Alliance, SkyTeam, or Oneworld. However, if you booked your flights as separate tickets (a "self-transfer" common with budget airlines like Ryanair or Southwest), you must check in for each flight individually. Additionally, even on a single ticket, some international connections may require a "document check" at the transfer desk of the layover airport before your second boarding pass is fully activated. For flights to the USA, you will often receive all boarding passes at once, but you will still need to collect your bags, clear customs, and re-check them at the transfer belt, even though your "check-in" status is already confirmed.