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

Return flights

01 Jul - 08 Jul	Iberia
10 Jul - 17 Jul	British Airways
23 Jul - 27 Jul	Iberia
19 Jul - 26 Jul	Iberia
26 Jul - 02 Aug	Iberia
19 Jul - 23 Jul	Air France
23 Jul - 27 Jul	TAP	direct
11 Jul - 16 Jul	KLM
20 Jul - 25 Jul	Delta
07 Jul - 10 Jul	TAP
22 Jul - 26 Jul	TAP

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 $697

Return flights