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

Return flights

20 Jan - 30 Jan	KLM
16 Jan - 23 Jan	Iberia
23 Jan - 30 Jan	Iberia
25 Jan - 04 Feb	Iberia
27 Jan - 04 Feb	Iberia
28 Jan - 04 Feb	Iberia
16 Jan - 22 Jan	TAP	direct
28 Jan - 05 Feb	Iberia
29 Jan - 05 Feb	Iberia
27 Jan - 05 Feb	Iberia
26 Jan - 05 Feb	Iberia
27 Jan - 06 Feb	KLM
25 Jan - 01 Feb	KLM
26 Jan - 01 Feb	KLM
18 Jan - 25 Jan	KLM
19 Jan - 26 Jan	Azores Airlines
20 Jan - 27 Jan	Azores Airlines
25 Jan - 29 Jan	Azores Airlines
15 Jan - 22 Jan	TAP	direct
14 Jan - 21 Jan	Azores Airlines

Also check the deals for one-way flights from Lisbon to Boston 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 Lisbon to Boston in January from 442€

Return flights