Secret tip:. The very last booking to check-in to the plane will always be seated together in Ryanair, as long as the planes full.

Check in closes 2 hours before departure, so if you check in 2 hrs and 10 mins before departure, you'll not only be seated together, but also usually get emergency exit row seats that are normally premium.

If you aren't seated together, it's because the plane isn't full, and the emergency exit rows will usually be unallocated unless someone paid to upgrade to them.