AirHint found the following cheapest return flights from Washington (IAD) to Porto (OPO) in February 2026 (see full year).
Return flights
| 25 Feb - 04 Mar | United | ||
| 13 Feb - 21 Feb | TAP | ||
| 14 Feb - 21 Feb | TAP | ||
| 05 Feb - 12 Feb | TAP | ||
| 08 Feb - 15 Feb | TAP | ||
| 02 Feb - 09 Feb | TAP |
Also check the deals for one-way flights from Washington to Porto in February.
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