Cheapest return flights from Washington to Porto in May from $700

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 May 2025 (see full year).

Return flights

14 May - 21 May Air Canada
16 May - 23 May Iberia
04 May - 12 May British Airways
12 May - 03 Jun Iberia
20 May - 09 Jun jetBlue
16 May - 31 May Air Canada
23 May - 08 Jun British Airways
10 May - 31 May TAP

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

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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