AirHint found the following cheapest return flights from Washington (DCA) to Lisbon (LIS) in January 2026 (see full year).

Return flights

15 Jan - 07 Feb	Scandinavian Airlines
17 Jan - 24 Jan	Scandinavian Airlines
21 Jan - 28 Jan	Scandinavian Airlines
24 Jan - 31 Jan	Scandinavian Airlines
08 Jan - 17 Jan	Scandinavian Airlines
10 Jan - 17 Jan	jetBlue
08 Jan - 14 Jan	Scandinavian Airlines
16 Jan - 24 Jan	Scandinavian Airlines
20 Jan - 27 Jan	jetBlue
12 Jan - 19 Jan	jetBlue
26 Jan - 02 Feb	jetBlue
09 Jan - 16 Jan	jetBlue
27 Jan - 03 Feb	United
25 Jan - 01 Feb	Air France
15 Jan - 06 Feb	United
30 Jan - 13 Feb	Scandinavian Airlines

Also check the deals for one-way flights from Washington to Lisbon in January.

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 Washington to Lisbon in January from $518

Return flights