Cheapest return flights from Washington to Porto in March from $508

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

Return flights

16 Mar - 25 Mar United
06 Mar - 13 Mar Air Canada
31 Mar - 07 Apr United
30 Mar - 06 Apr Delta
29 Mar - 05 Apr Delta

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

Skyscanner

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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