Cheapest return flights from Washington to Porto in March from $542

Best time to book flights for Washington (DCA) to Porto (OPO) flights at AirHint

AirHint found the following cheapest return flights from Washington (DCA) to Porto (OPO) in March 2025 (see full year).

Return flights

11 Mar - 04 Apr KLM
10 Mar - 04 Apr KLM
17 Mar - 24 Mar Delta
12 Mar - 19 Mar Air Canada
11 Mar - 18 Mar Delta
16 Mar - 23 Mar Air Canada
26 Mar - 02 Apr Iberia
13 Mar - 20 Mar Air Canada
15 Mar - 22 Mar Delta
06 Mar - 11 Mar jetBlue
06 Mar - 12 Mar TAP

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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