The venue for Sziget 2026 is Óbuda Island, Budapest, Hungary. From Lisbon it's roughly 2,468 km — plan on about 3h 50m in the air, landing at BUD. For the festival dates, round-trip fares start around $230; they climb fastest in the last 6–8 weeks.
Sample fares Lisbon → BUD. Final prices and dates are on the partner site.