Austria’s Supreme Court ruled 14 of 15 Ryanair fee clauses unlawful under Section 879(3) of the ABGB, voiding charges for airport check-in, boarding passes, infant fees, and name changes due to opacity and gross consumer disadvantage. The court mandates Ryanair cease using these contested clauses within three months, by late August 2026, while VKI asserts passengers may claim refunds for prior payments, though Ryanair disputes retroactive reimbursement. This landmark decision targets the carrier’s core low-base-fare-plus-high-ancillary model, potentially triggering similar litigation across EU operators and reshaping ancillary fee transparency standards for the sector.