Cheapest return flights from Washington to Porto in June from $662

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 June 2025 (see full year).

Return flights

03 Jun - 10 Jun British Airways
09 Jun - 19 Jun Air Canada
30 Jun - 07 Jul SWISS
02 Jun - 09 Jun KLM
10 Jun - 17 Jun United
17 Jun - 24 Jun United
04 Jun - 11 Jun TAP
09 Jun - 16 Jun KLM
11 Jun - 18 Jun KLM
16 Jun - 23 Jun KLM
24 Jun - 01 Jul KLM
25 Jun - 02 Jul United
23 Jun - 30 Jun SWISS
27 Jun - 04 Jul SWISS
29 Jun - 06 Jul SWISS
27 Jun - 08 Jul SWISS
26 Jun - 03 Jul British Airways
28 Jun - 05 Jul Air Canada

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

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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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