Cheapest return flights from Washington to Porto in December from $443

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

Return flights

03 Dec - 15 Jan British Airways
03 Dec - 10 Dec TAP
09 Dec - 16 Dec TAP
06 Dec - 13 Dec TAP
24 Dec - 29 Dec Lufthansa
24 Dec - 31 Dec Austrian Airlines
15 Dec - 22 Dec TAP
12 Dec - 19 Dec TAP
26 Dec - 03 Jan Lufthansa
20 Dec - 27 Dec Aer Lingus
30 Dec - 06 Jan TAP

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

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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