# Flights from Porto (OPO) to Billund (BLL)

1 direct, 25 routes with 1 stop, 2724 with 2 stops. Straight-line distance 2068 km.

## Direct

Norwegian Air Sweden flies direct, about 2069 km.

## Shortest routes

- OPO → BLL · 2069 km · about 185 min · 0 stops
- OPO → AMS → BLL · 2075 km · about 315 min · 1 stop
- OPO → LGW → BLL · 2082 km · about 325 min · 1 stop
- OPO → CDG → BLL · 2106 km · about 330 min · 1 stop
- OPO → CGN → BLL · 2177 km · about 320 min · 1 stop
- OPO → FRA → BLL · 2291 km · about 330 min · 1 stop
- OPO → CPH → BLL · 2449 km · about 335 min · 1 stop
- OPO → EDI → BLL · 2462 km · about 345 min · 1 stop

## How to query this

- JSON: https://travel.buy-it.gr/api/v1/routes/OPO/BLL
- This page: https://travel.buy-it.gr/api/v1/routes/OPO/BLL.md
- HTML, English: https://travel.buy-it.gr/en/flights/OPO-BLL
- All routes: https://travel.buy-it.gr/api/search?from=OPO&to=BLL&maxStops=2
- Operating days for one leg: https://travel.buy-it.gr/api/leg?from=OPO&to=BLL
- Price a path on one date: https://travel.buy-it.gr/api/price?path=OPO,BLL&date=2026-10-09

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.