AirHint found the following cheapest return flights from Riga (RIX) to Lisbon (LIS) in December 2026 (see full year).
Return flights
| 26 Dec - 31 Dec | LOT | ||
| 26 Dec - 31 Dec | airBaltic | direct | |
| 31 Dec - 03 Jan | KLM |
Also check the deals for one-way flights from Riga to Lisbon in December.
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