AirHint found the following cheapest one-way flights from Washington (DCA) to Porto (OPO) in November 2025 (see full year).
One-Way flights
| 30 Nov | United | ||
| 02 Nov | United | ||
| 25 Nov | British Airways | ||
| 10 Nov | British Airways |
Also check the deals for return flights from Washington to Porto in November.
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