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

Return flights

11 Nov - 18 Nov	United
12 Nov - 19 Nov	Delta
12 Nov - 06 Dec	Air France
11 Nov - 06 Dec	Air France
13 Nov - 22 Nov	Air Canada
16 Nov - 06 Dec	British Airways
25 Nov - 30 Nov	Air Canada
08 Nov - 15 Nov	KLM
10 Nov - 06 Dec	British Airways
22 Nov - 29 Nov	Air Canada
21 Nov - 30 Nov	Air Canada
21 Nov - 29 Nov	Air Canada

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

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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Cheapest return flights from Washington to Porto in November from $483

Return flights