Cheap flights from Washington to Aliados

View AU$558 flight on Sun, 7 Sep. 2025Opens in a new window

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Cheap Flights from Washington (WAS) to Aliados (OPO)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sun, 7 Sep. - Sun, 14 Sep.
DCA
Washington
OPO
Porto
AU$1,088 Return, found 6 hours ago
AU$1,088
Return
found 6 hours ago
Select United flight, departing Sun, 7 Sep. from Washington to Porto, returning Sun, 14 Sep., priced at AU$1,088 found 6 hours ago
United
Sun, 7 Sep. - Sun, 14 Sep.
DCA
Washington
OPO
Porto
AU$1,125 Return, found 6 hours ago
AU$1,125
Return
found 6 hours ago
Select United flight, departing Sun, 7 Sep. from Washington to Porto, returning Sun, 14 Sep., priced at AU$1,125 found 6 hours ago
KLM
Sun, 7 Sep. - Sun, 14 Sep.
DCA
Washington
OPO
Porto
AU$1,218 Return, found 6 hours ago
AU$1,218
Return
found 6 hours ago
Select KLM flight, departing Sun, 7 Sep. from Washington to Porto, returning Sun, 14 Sep., priced at AU$1,218 found 6 hours ago
JetBlue Airways
Sun, 7 Sep. - Sun, 14 Sep.
DCA
Washington
OPO
Porto
AU$1,461 Return, found 6 hours ago
AU$1,461
Return
found 6 hours ago
Select JetBlue Airways flight, departing Sun, 7 Sep. from Washington to Porto, returning Sun, 14 Sep., priced at AU$1,461 found 6 hours ago
Delta
Sun, 7 Sep. - Sun, 14 Sep.
DCA
Washington
OPO
Porto
AU$1,496 Return, found 6 hours ago
AU$1,496
Return
found 6 hours ago
Select Delta flight, departing Sun, 7 Sep. from Washington to Porto, returning Sun, 14 Sep., priced at AU$1,496 found 6 hours ago
TAP Portugal
Sun, 7 Sep. - Sun, 14 Sep.
DCA
Washington
OPO
Porto
AU$1,515 Return, found 6 hours ago
AU$1,515
Return
found 6 hours ago
Select TAP Portugal flight, departing Sun, 7 Sep. from Washington to Porto, returning Sun, 14 Sep., priced at AU$1,515 found 6 hours ago

Find the cheapest month to fly from Washington (WAS) to Porto (OPO)

February is typically the cheapest month to fly

From AU$654 - AU$1,245 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.