Cheapest return flights from Boston to Porto in August from $459

Best time to book flights for Boston (BOS) to Porto (OPO) flights at AirHint

AirHint found the following cheapest return flights from Boston (BOS) to Porto (OPO) in August 2025 (see full year).

Return flights

05 Aug - 19 Aug British Airways
25 Aug - 15 Sep British Airways
06 Aug - 20 Aug British Airways
18 Aug - 27 Aug British Airways
30 Aug - 08 Sep British Airways
30 Aug - 06 Sep Icelandair
06 Aug - 25 Aug Air Canada
18 Aug - 27 Aug TAP direct
03 Aug - 17 Aug TAP direct
25 Aug - 15 Sep TAP direct
30 Aug - 06 Sep TAP direct
30 Aug - 08 Sep TAP direct

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

Skyscanner

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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