Yes, you can check in someone else for a Ryanair flight, provided you are on the same booking or have their specific booking reference and email address. When you log into the Ryanair app or website and select "Check-in," the system will list all passengers associated with that reservation. You can then enter the required passport or national ID details for each person. However, in 2026, Ryanair has introduced stricter "Identity Verification" protocols for bookings made through third-party travel agents; in these cases, each passenger may be required to complete a "biometric face check" on their own device before they can be checked in. For standard direct bookings, one person can easily handle the check-in for the whole family or group. It is vital to remember that Ryanair strictly requires online check-in to be completed at least two hours before departure; failing to do so—or checking in at the airport desk—will result in a "Check-in Fee" of approximately €/£55 per person. Always ensure you have the correct documentation for all travelers to avoid boarding delays.