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Cheapest cached fares Cologne → Istanbul; direct flights available (e.g. VF). · Based on 13 fares found by travellers in the last 48h
Best value: Mar — fares from €52 and ~17°C daytime.
Flights from Cologne to Istanbul start around €52 (direct flights available). Range seen recently: €52–55, based on 13 fares found by travellers.
Fares found by travellers in the last 48 hours — refreshed daily.
In May, Istanbul typically sees ~20°C daytime highs and 12 rainy days.
Top-rated tours and tickets from €27 — book ahead for the popular ones.
Tours and tickets provided by Viator (a Tripadvisor company). Some links earn Stayonomy a commission.
Istanbul (Turkish: İstanbul) is a very large city of fantastic history, culture and beauty. Called Byzantium in ancient times, the city's name was changed to Constantinople in 324 CE when it was rebuilt by the first Christian Roman Emperor, Constantine. The name "Istanbul", perhaps surprisingly, comes from Greek and could be translated as a corruption of "to the city".
Guide content from Wikivoyage contributors (CC BY-SA).
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Flight prices are real fares travellers found in the last 48 hours, refreshed daily — the booking site confirms the final price. Train, bus and ferry fares are shown on the operators' booking sites. Weather data by Open-Meteo; exchange rates: ECB reference. Data updated 2026-11-05. Some links earn Stayonomy a commission at no cost to you.