Cheapest return flights from Washington to Porto in October from 596€

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

Return flights

22 Oct - 15 Nov KLM
29 Oct - 22 Nov United
25 Oct - 15 Nov United
22 Oct - 29 Oct Delta
24 Oct - 15 Nov KLM
19 Oct - 31 Oct Delta
19 Oct - 24 Oct TAP
29 Oct - 01 Nov Delta
31 Oct - 03 Nov British Airways

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

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