Cheapest return flights from Lisbon to Boston in December from $372

AirHint found the following cheapest return flights from Lisbon (LIS) to Boston (BOS) in December 2025 (see full year).

Return flights

10 Dec - 16 Dec Iberia For Level
18 Dec - 04 Jan TAP direct
27 Dec - 04 Jan TAP direct
26 Dec - 04 Jan TAP direct
02 Dec - 10 Dec Aer Lingus
04 Dec - 08 Dec Aer Lingus
21 Dec - 05 Jan British Airways
22 Dec - 05 Jan British Airways
23 Dec - 05 Jan British Airways
13 Dec - 03 Jan Vueling Airlines
19 Dec - 05 Jan American Airlines
20 Dec - 04 Jan British Airways
20 Dec - 05 Jan British Airways
09 Dec - 16 Dec Delta
18 Dec - 29 Dec KLM
04 Dec - 08 Dec Virgin Atlantic direct
13 Dec - 17 Dec Ryanair
20 Dec - 28 Dec Delta direct
20 Dec - 27 Dec Delta direct
02 Dec - 10 Dec TAP direct

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

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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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