Cheapest return flights from Washington to Porto in October from $551

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

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

Return flights

28 Oct - 04 Nov TAP
27 Oct - 03 Nov TAP
14 Oct - 21 Oct Scandinavian Airlines
21 Oct - 28 Oct Scandinavian Airlines
26 Oct - 02 Nov Iberia
24 Oct - 31 Oct SWISS
22 Oct - 29 Oct United
01 Oct - 08 Oct Turkish Airlines
02 Oct - 09 Oct Turkish Airlines
08 Oct - 15 Oct Turkish Airlines
09 Oct - 16 Oct Turkish Airlines
15 Oct - 22 Oct Turkish Airlines
16 Oct - 23 Oct Turkish Airlines
25 Oct - 01 Nov 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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