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

Return flights

16 Oct - 19 Oct	Iberia For Level
14 Oct - 19 Oct	Aer Lingus
17 Oct - 19 Oct	Aer Lingus
14 Oct - 20 Oct	Aer Lingus
15 Oct - 19 Oct	easyJet
14 Oct - 23 Oct	Ryanair
28 Oct - 06 Nov	Air Europa
22 Oct - 27 Oct	easyJet
14 Oct - 05 Nov	Aer Lingus
01 Oct - 11 Oct	Aer Lingus
11 Oct - 19 Oct	Aer Lingus
11 Oct - 16 Nov	Aer Lingus
22 Oct - 26 Oct	KLM
30 Oct - 16 Nov	Delta
21 Oct - 05 Nov	Delta
29 Oct - 04 Nov	British Airways
23 Oct - 06 Nov	British Airways
24 Oct - 02 Nov	easyJet
24 Oct - 02 Nov	TAP	direct
28 Oct - 06 Nov	TAP	direct

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

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.

Book a cheap hotel in Boston

Cheap car rent in Boston

Cheapest return flights from Lisbon to Boston in October from $517

Return flights