AirHint found the following cheapest return flights from San Sebastian (EAS) to Lisbon (LIS) in December 2025 (see full year).
Return flights
| 12 Dec - 15 Dec | Iberia | ||
| 06 Dec - 13 Dec | Iberia | ||
| 02 Dec - 06 Dec | Iberia | ||
| 31 Dec - 02 Jan | Iberia | ||
| 29 Dec - 02 Jan | Iberia |
Also check the deals for one-way flights from San Sebastian to Lisbon in December.
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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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