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

Return flights

25 Jan - 01 Feb	Royal Air Maroc
18 Jan - 26 Jan	Iberia
29 Jan - 10 Feb	Scandinavian Airlines
13 Jan - 22 Jan	Turkish Airlines
28 Jan - 09 Feb	Turkish Airlines
22 Jan - 09 Feb	Turkish Airlines
19 Jan - 26 Jan	TAP	direct
21 Jan - 28 Jan	TAP	direct
23 Jan - 30 Jan	TAP	direct
18 Jan - 26 Jan	TAP	direct
28 Jan - 09 Feb	TAP	direct
28 Jan - 04 Feb	TAP	direct
30 Jan - 06 Feb	TAP	direct
22 Jan - 09 Feb	TAP	direct
13 Jan - 20 Jan	Turkish Airlines
25 Jan - 01 Feb	TAP	direct
11 Jan - 16 Jan	Icelandair
07 Jan - 14 Jan	Icelandair
10 Jan - 17 Jan	Frontier 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 483€

Return flights