AirHint found the following cheapest one-way flights from Boston (BOS) to Porto (OPO) in December 2025 (see full year).
One-Way flights
| 28 Dec | Lufthansa | ||
| 23 Dec | Air Canada | ||
| 20 Dec | Spirit Airlines | ||
| 22 Dec | Spirit Airlines | ||
| 26 Dec | British Airways | ||
| 17 Dec | Lufthansa | ||
| 18 Dec | Spirit Airlines | ||
| 19 Dec | Frontier Airlines |
Also check the deals for return flights from Boston to Porto in December.
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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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