Cheapest return flights from Washington to Porto in April from 503€

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 April 2025 (see full year).

Return flights

02 Apr - 09 Apr SWISS
01 Apr - 08 Apr United
02 Apr - 06 Apr Delta
07 Apr - 14 Apr TAP
28 Apr - 05 May TAP
04 Apr - 11 Apr TAP
18 Apr - 25 Apr TAP
25 Apr - 02 May TAP
08 Apr - 15 Apr Turkish Airlines
06 Apr - 13 Apr TAP
05 Apr - 12 Apr TAP
08 Apr - 29 Apr British Airways
23 Apr - 11 May British Airways
24 Apr - 11 May British Airways

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

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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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