Every Istanbul–Seoul fare we track, measured against the route's typical price whenever there is enough cached history to build one. Subscribe in any RSS reader for free single-route price alerts — no account, no email needed.https://flight.dealsen-ushttps://flight.deals/flights/istanbul-to-seoul/#2026-12-31-2027-01-10-CZhttps://flight.deals/flights/istanbul-to-seoul/#2026-12-31-2027-01-10-CZIST → SEL round-trip on China Southern, 2026-12-31 to 2027-01-10 (10 nights). Cached fare $484 vs typical $540.Tue, 01 Sep 2026 12:09:07 GMT