AirHint found the following cheapest one-way flights from Boston (BOS) to Porto (OPO) in August 2026 (see full year).
One-Way flights
| 05 Aug | SWISS | ||
| 04 Aug | Lufthansa | ||
| 09 Aug | Lufthansa | ||
| 20 Aug | SWISS | ||
| 15 Aug | Air Canada | ||
| 09 Aug | TAP | direct | |
| 05 Aug | TAP | direct | |
| 15 Aug | TAP | direct |
Also check the deals for return flights from Boston to Porto in August.
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