AirHint found the following cheapest return flights from Billund (BLL) to Lisbon (LIS) in September 2026 (see full year).
Return flights
| 29 Sep - 28 Oct | KLM | ||
| 19 Sep - 21 Sep | LOT | ||
| 04 Sep - 08 Sep | Norwegian Air Sweden AOC | ||
| 24 Sep - 14 Oct | Norwegian Air Sweden AOC | ||
| 12 Sep - 20 Sep | Lufthansa | ||
| 07 Sep - 20 Sep | KLM |
Also check the deals for one-way flights from Billund to Lisbon in September.
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