# Flights from Istanbul (IST) to Porto (OPO)

1 direct, 73 routes with 1 stop, 7927 with 2 stops. Straight-line distance 3103 km.

## Direct

Turkish Airlines flies direct, about 3111 km.

## Shortest routes

- IST → OPO · 3111 km · about 295 min · 0 stops
- IST → MRS → OPO · 3115 km · about 420 min · 1 stop
- IST → NCE → OPO · 3117 km · about 420 min · 1 stop
- IST → FCO → OPO · 3118 km · about 430 min · 1 stop
- IST → SPU → OPO · 3118 km · about 415 min · 1 stop
- IST → TLS → OPO · 3123 km · about 420 min · 1 stop
- IST → BCN → OPO · 3124 km · about 435 min · 1 stop
- IST → BRI → OPO · 3130 km · about 415 min · 1 stop

## How to query this

- JSON: https://travel.buy-it.gr/api/v1/routes/IST/OPO
- This page: https://travel.buy-it.gr/api/v1/routes/IST/OPO.md
- HTML, English: https://travel.buy-it.gr/en/flights/IST-OPO
- All routes: https://travel.buy-it.gr/api/search?from=IST&to=OPO&maxStops=2
- Operating days for one leg: https://travel.buy-it.gr/api/leg?from=IST&to=OPO
- Price a path on one date: https://travel.buy-it.gr/api/price?path=IST,OPO&date=2026-10-10

Replace airport codes in any of those URLs. `path` is comma-separated IATA codes, 2 to 5 airports. `date` is YYYY-MM-DD. `carriers` is optional, legs joined by `|` and airlines inside a leg joined by `.`, for example `FR|LO`.

The first flight must leave on `date`. Each following flight may leave that same day or the next day, and must depart at least 90 minutes after the previous flight lands. A response with `partial: true` on a calendar lists days a source has seen. It does not prove the other days are empty.

No API key. Responses are JSON unless the URL ends in `.md`. Prices are euros. `total: null` means no fare was found for the first flight on that date.