Cheapest return flights from Washington to Porto in May from $638

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

Return flights

05 May - 12 May British Airways
11 May - 18 May Delta
04 May - 11 May Delta
08 May - 15 May Iberia
12 May - 19 May Delta
13 May - 20 May jetBlue
06 May - 13 May Delta
09 May - 16 May British Airways
20 May - 03 Jun British Airways
02 May - 09 May British Airways
10 May - 17 May jetBlue
26 May - 02 Jun Delta
27 May - 03 Jun Delta
20 May - 08 Jun British Airways
25 May - 01 Jun Delta
28 May - 04 Jun Delta
31 May - 07 Jun Delta
29 May - 05 Jun Air France
30 May - 06 Jun Delta
14 May - 10 Jun British Airways

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

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