Cheapest return flights from Washington to Porto in July from $655

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 July 2025 (see full year).

Return flights

01 Jul - 08 Jul Air Canada
09 Jul - 13 Jul Air Canada
03 Jul - 10 Jul British Airways
22 Jul - 27 Jul Lufthansa
03 Jul - 18 Jul Lufthansa
10 Jul - 14 Jul British Airways
23 Jul - 02 Aug Turkish Airlines
27 Jul - 03 Aug TAP

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

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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