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

Return flights

12 Jan - 19 Jan	Air Canada
17 Jan - 24 Jan	Iberia For Level
15 Jan - 20 Jan	Iberia For Level
29 Jan - 03 Feb	Iberia For Level
17 Jan - 24 Jan	TAP	direct
22 Jan - 29 Jan	TAP	direct
03 Jan - 10 Jan	Lufthansa
27 Jan - 03 Feb	TAP
12 Jan - 19 Jan	TAP	direct
02 Jan - 09 Jan	TAP	direct

Also check the deals for one-way flights from Boston 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 Boston to Lisbon in January from 342€

Return flights