AirHint found the following cheapest return flights from Boston (BOS) to Porto (OPO) in August 2026 (see full year).
Return flights
| 12 Aug - 31 Aug | United | ||
| 19 Aug - 12 Sep | United | ||
| 12 Aug - 19 Aug | Air Canada | ||
| 19 Aug - 13 Sep | Air Canada | ||
| 01 Aug - 24 Aug | United | ||
| 01 Aug - 17 Aug | SWISS |
Also check the deals for one-way flights from Boston to Porto in August.
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