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

Return flights

18 Jun - 23 Jun	United
13 Jun - 21 Jun	Delta
14 Jun - 21 Jun	Delta
30 Jun - 09 Jul	TAP	direct
21 Jun - 29 Jun	United
21 Jun - 30 Jun	United
21 Jun - 27 Jun	Iberia
21 Jun - 28 Jun	Iberia
30 Jun - 12 Jul	TAP	direct
22 Jun - 28 Jun	KLM
30 Jun - 08 Jul	KLM
21 Jun - 30 Jun	TAP	direct
21 Jun - 29 Jun	TAP	direct

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

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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Cheapest return flights from Porto to Boston in June from $637

Return flights