On Ryanair in 2026, paying to book a specific seat is optional but highly recommended if you wish to sit with your travel companions. If you choose not to pay for a seat, you will be randomly assigned a seat for free when online check-in opens (typically 24 hours before the flight). Ryanair's algorithm is notorious for separating groups who do not pay, often placing them in middle seats across different rows. For 2026, seat fees typically range from €5.00 for standard seats in the back to €30.00+ for extra-legroom seats in rows 1, 16, and 17. There is one major exception: Families traveling with children under 12 must have at least one adult purchase a "Mandatory Family Seat" (starting around €6.00), which then allows up to four children to receive free reserved seats in the same row. If you are flying on a "Plus" or "Flexi Plus" fare, seat selection is already included in your ticket price. For budget travelers, the "pro" strategy in 2026 is to decide if the 2-hour flight is worth the extra €10–€20 to sit together, or if you're happy to "embrace the random" and save the money for your destination.