AirHint found the following cheapest return flights from Lisbon (LIS) to Riga (RIX) in December 2025 (see full year).

Return flights

31 Dec - 19 Jan	Ryanair
30 Dec - 19 Jan	Ryanair
31 Dec - 07 Jan	Ryanair
27 Dec - 17 Jan	Ryanair
29 Dec - 19 Jan	Ryanair
25 Dec - 15 Jan	Air Europa
28 Dec - 31 Dec	Ryanair
31 Dec - 02 Jan	Ryanair
30 Dec - 01 Jan	Ryanair
23 Dec - 30 Dec	Ryanair
31 Dec - 03 Jan	Ryanair
22 Dec - 29 Dec	Ryanair
25 Dec - 01 Jan	Air Europa
24 Dec - 31 Dec	Air Europa
23 Dec - 28 Dec	Ryanair
23 Dec - 29 Dec	Ryanair
23 Dec - 27 Dec	Ryanair
20 Dec - 27 Dec	Ryanair
20 Dec - 22 Dec	Ryanair
22 Dec - 24 Dec	Ryanair

Also check the deals for one-way flights from Lisbon to Riga in December.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Lisbon to Riga in December from 187€

Return flights