The cheapest round-trip from Porto to Istanbul is about 207 EUR, usually in December 2026; August 2026 is priciest, so booking the low month saves around 111 EUR (~35%). Typical fare ~219 EUR, from 182 priced fares. Flightmussy live data, updated 2026-06-05.
Cheap flights from Porto (OPO) 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: 207 EUR, usually around December 2026. Typical fare ~219 EUR. Across the year prices range roughly 207–318 EUR — about 35% cheaper in the low season than the peak (August 2026).
Based on Flightmussy's live 12-month fare data; prices last updated 2026-06-05. Prices change constantly — search live for current fares.
Flightmussy is a free flight meta-search built by one person in Oslo. No signup, no ads, no tracking — email is optional, only for route price alerts. Compare fares across airlines and see 12 months of prices at a glance — including low-cost carriers Google Flights often deprioritises (Widerøe, Wizz Air, Norwegian, Ryanair). Pay with a card at the airline, or use the Crypto button on any result to check out in BTC, ETH, USDT, BNB or AVA via Travala.