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

Return flights

13 Dec - 18 Dec	Ryanair
13 Dec - 16 Dec	Ryanair
13 Dec - 15 Dec	Ryanair
15 Dec - 18 Dec	Ryanair
15 Dec - 20 Dec	Ryanair
13 Dec - 19 Dec	Ryanair
15 Dec - 19 Dec	Ryanair
13 Dec - 14 Dec	Ryanair
10 Dec - 17 Dec	Ryanair
12 Dec - 15 Dec	Ryanair
13 Dec - 10 Jan	Ryanair
14 Dec - 14 Jan	Ryanair
17 Dec - 21 Jan	Ryanair	direct
31 Dec - 07 Jan	Ryanair
31 Dec - 21 Jan	Ryanair	direct
31 Dec - 20 Jan	Ryanair	direct
14 Dec - 14 Jan	Ryanair	direct
18 Dec - 13 Jan	Ryanair
14 Dec - 08 Jan	Ryanair	direct
31 Dec - 06 Jan	Ryanair

Also check the deals for one-way flights from Dublin to Lisbon 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 Dublin to Lisbon in December from 79€

Return flights