Cheapest one-way flights from Boston to Lisbon in September from $261

AirHint found the following cheapest one-way flights from Boston (BOS) to Lisbon (LIS) in September 2026 (see full year).

One-Way flights

15 Sep Austrian Airlines
21 Sep Air Canada
07 Sep TAP direct
15 Sep TAP direct
21 Sep TAP direct
04 Sep TAP direct
05 Sep TAP direct
11 Sep TAP direct

Also check the deals for return flights from Boston to Lisbon in September.

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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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