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

1 direct, 72 routes with 1 stop, 7773 with 2 stops. Straight-line distance 3103 km.

## Direct

Turkish Airlines flies direct, about 3111 km.

## Shortest routes

- OPO → IST · 3111 km · about 275 min · 0 stops
- OPO → MRS → IST · 3115 km · about 395 min · 1 stop
- OPO → NCE → IST · 3117 km · about 400 min · 1 stop
- OPO → FCO → IST · 3118 km · about 420 min · 1 stop
- OPO → SPU → IST · 3118 km · about 405 min · 1 stop
- OPO → TLS → IST · 3123 km · about 405 min · 1 stop
- OPO → BCN → IST · 3124 km · about 410 min · 1 stop
- OPO → BRI → IST · 3130 km · about 405 min · 1 stop

## How to query this

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