The cheapest round-trip from Lisbon to Istanbul is about 214 EUR, usually in December 2026; August 2026 is priciest, so booking the low month saves around 108 EUR (~34%). Typical fare ~230 EUR, from 228 priced fares. Flightmussy live data, updated 2026-06-05.
Cheap flights from Lisbon (LIS) to Istanbul (IST/SAW). Free, no signup, no ads, no tracking. Compare every airline across 12 months of fares on one heatmap — including low-cost carriers Google Flights often deprioritises.
Cheapest round-trip seen: 214 EUR, usually around December 2026. Typical fare ~230 EUR. Across the year prices range roughly 214–322 EUR — about 34% cheaper in the low season than the peak (August 2026). Carriers on this route include Vueling, Air Serbia, Turkish Airlines, Lufthansa.
Based on Flightmussy's live 12-month fare data; prices last updated 2026-06-05. Prices change constantly — search live for current fares.
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