Cheapest return flights from Washington to Porto in October from $590

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

Return flights

15 Oct - 22 Oct Iberia
01 Oct - 08 Oct Iberia
07 Oct - 14 Oct Delta
06 Oct - 13 Oct jetBlue
08 Oct - 15 Oct jetBlue
02 Oct - 09 Oct KLM
05 Oct - 12 Oct Delta
09 Oct - 16 Oct Delta
10 Oct - 19 Oct American Airlines
04 Oct - 11 Oct Iberia

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

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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