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

Return flights

30 Jan - 02 Feb	Ryanair
27 Jan - 02 Feb	Iberia
17 Jan - 24 Jan	Iberia
27 Jan - 01 Feb	Iberia
13 Jan - 30 Jan	British Airways
27 Jan - 02 Feb	TAP	direct
27 Jan - 01 Feb	TAP	direct
12 Jan - 31 Jan	British Airways
12 Jan - 29 Jan	British Airways
31 Jan - 28 Feb	TAP	direct
12 Jan - 25 Jan	KLM
12 Jan - 30 Jan	KLM
12 Jan - 28 Jan	KLM
15 Jan - 22 Jan	KLM
22 Jan - 02 Feb	Aer Lingus
29 Jan - 31 Jan	LEVEL
17 Jan - 24 Jan	TAP	direct
30 Jan - 02 Feb	TAP	direct
26 Jan - 02 Feb	Azores Airlines
28 Jan - 04 Feb	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 $532

Return flights