Cheapest return flights from Washington to Porto in July from $671

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

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

Return flights

08 Jul - 15 Jul United
15 Jul - 22 Jul United
22 Jul - 29 Jul United
29 Jul - 05 Aug United
16 Jul - 23 Jul United
30 Jul - 06 Aug United
13 Jul - 20 Jul United
20 Jul - 27 Jul United
23 Jul - 27 Jul Air Canada
10 Jul - 17 Jul United
17 Jul - 24 Jul United
24 Jul - 31 Jul United
31 Jul - 07 Aug Delta
28 Jul - 04 Aug United
27 Jul - 03 Aug United
25 Jul - 01 Aug United
26 Jul - 02 Aug Delta

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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