Cheapest return flights from Washington to Porto in March from $565

AirHint found the following cheapest return flights from Washington (DCA) to Porto (OPO) in March 2026 (see full year).

Return flights

23 Mar - 30 Mar British Airways
04 Mar - 11 Mar Iberia
16 Mar - 23 Mar British Airways
05 Mar - 18 Mar Iberia

Also check the deals for one-way flights from Washington to Porto in March.

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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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