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

Return flights

10 Mar - 24 Mar	Iberia For Level
19 Mar - 28 Mar	Iberia For Level
25 Mar - 29 Mar	Icelandair
27 Mar - 03 Apr	SWISS
26 Mar - 02 Apr	SWISS
28 Mar - 04 Apr	SWISS
15 Mar - 04 Apr	United
29 Mar - 18 Apr	SWISS
15 Mar - 21 Mar	TAP	direct
12 Mar - 04 Apr	SWISS
17 Mar - 22 Mar	Iberia For Level
07 Mar - 13 Mar	Iberia For Level
26 Mar - 02 Apr	TAP	direct
12 Mar - 04 Apr	TAP	direct
15 Mar - 04 Apr	TAP	direct
13 Mar - 04 Apr	TAP	direct
10 Mar - 24 Mar	TAP	direct
19 Mar - 28 Mar	TAP	direct
25 Mar - 29 Mar	TAP	direct
23 Mar - 30 Mar	TAP	direct

Also check the deals for one-way flights from Boston to Lisbon in March.

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 March from 353€

Return flights