AirHint found the following cheapest return flights from Washington (DCA) to Porto (OPO) in February 2026 (see full year).

Return flights

10 Feb - 17 Feb	Air Canada
04 Feb - 11 Feb	Delta
26 Feb - 05 Mar	United
05 Feb - 12 Feb	Air France
09 Feb - 16 Feb	KLM
11 Feb - 18 Feb	Air Canada
08 Feb - 15 Feb	American Airlines
26 Feb - 02 Mar	United
27 Feb - 04 Mar	British Airways
27 Feb - 05 Mar	British Airways
27 Feb - 06 Mar	British Airways
28 Feb - 07 Mar	Air France
06 Feb - 13 Feb	Delta
12 Feb - 19 Feb	Air Canada
26 Feb - 01 Mar	Delta
27 Feb - 02 Mar	British Airways
27 Feb - 07 Mar	British Airways
07 Feb - 14 Feb	jetBlue
26 Feb - 04 Mar	British Airways
14 Feb - 23 Feb	KLM

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

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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Cheapest return flights from Washington to Porto in February from 403€

Return flights