Cheap flights from Istanbul to Porto
Cheapest current fares: $110 in October 2026, 3,103 km direct flight in ~3h 39m.
Cheapest month-by-month fares
Lowest available fare per calendar month from Istanbul (IST) to Porto (OPO). Refreshed daily.
Istanbul (IST) → Porto (OPO)
- October 2026 $110
- June 2026 $125
- September 2026 $141
- July 2026 $142
- May 2026 $144
- August 2026 $167
Frequently asked questions
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What is the cheapest month to fly from Istanbul to Porto?
Based on current 6-month forward fare data, October 2026 is the cheapest month to fly from Istanbul (IST) to Porto (OPO), with fares starting from $110.
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What is the lowest current fare from IST to OPO?
The lowest currently-listed fare from Istanbul (IST) to Porto (OPO) is $110 on 2026-10-16.
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How long is the flight from Istanbul to Porto?
Direct flights from IST to OPO cover approximately 3,103 km (1,928 miles), with an estimated flight time of 3h 39m. Operating airlines: TK.
Related guides for this route
Sibling pages — full route detail, airport overviews, visa context, per-airline routes.