Cheapest return flights from Boston to Porto in September from $482

AirHint found the following cheapest return flights from Boston (BOS) to Porto (OPO) in September 2026 (see full year).

Return flights

29 Sep - 05 Oct SWISS
28 Sep - 04 Oct Delta
19 Sep - 03 Oct Air Canada
20 Sep - 03 Oct Air Canada
09 Sep - 16 Sep Iberia
27 Sep - 03 Oct Iberia
04 Sep - 11 Sep KLM
05 Sep - 12 Sep United
19 Sep - 03 Oct TAP direct
10 Sep - 17 Sep Turkish Airlines

Also check the deals for one-way flights from Boston to Porto 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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