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

Return flights

12 Jul - 13 Jul	Delta
26 Jul - 02 Aug	American Airlines
22 Jul - 29 Jul	Iberia
23 Jul - 30 Jul	Iberia
23 Jul - 27 Jul	Iberia
19 Jul - 23 Jul	Air France
23 Jul - 27 Jul	TAP	direct
11 Jul - 16 Jul	KLM
06 Jul - 13 Jul	KLM
06 Jul - 18 Jul	Ryanair
09 Jul - 10 Jul	Air Transat

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

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 July from $605

Return flights