$659 Cheap United flights Washington (DCA) to Porto (OPO)

$659 Cheap United flights Washington (DCA) to Porto (OPO)

Prices were available within the past 7 days and start at $659 for one-way flights and $783 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Jun 15 - Tue, Jun 24

DCA

Washington

OPO

Porto

$783 Roundtrip, found 23 hours ago

$783

Roundtrip

found 23 hours ago

Select United flight, departing Sun, Jun 15 from Washington to Porto, returning Tue, Jun 24, priced at $783 found 23 hours ago

Sat, Jun 14 - Tue, Jun 24

DCA

Washington

OPO

Porto

$788 Roundtrip, found 23 hours ago

$788

Roundtrip

found 23 hours ago

Select United flight, departing Sat, Jun 14 from Washington to Porto, returning Tue, Jun 24, priced at $788 found 23 hours ago

Mon, Jun 16 - Mon, Jun 23

DCA

Washington

OPO

Porto

$853 Roundtrip, found 23 hours ago

$853

Roundtrip

found 23 hours ago

Select United flight, departing Mon, Jun 16 from Washington to Porto, returning Mon, Jun 23, priced at $853 found 23 hours ago

Sat, Jun 14 - Mon, Jun 23

DCA

Washington

OPO

Porto

$858 Roundtrip, found 23 hours ago

$858

Roundtrip

found 23 hours ago

Select United flight, departing Sat, Jun 14 from Washington to Porto, returning Mon, Jun 23, priced at $858 found 23 hours ago

Sat, Jun 14 - Sat, Jun 21

DCA

Washington

OPO

Porto

$923 Roundtrip, found 23 hours ago

$923

Roundtrip

found 23 hours ago

Select United flight, departing Sat, Jun 14 from Washington to Porto, returning Sat, Jun 21, priced at $923 found 23 hours ago

Fri, Jun 20 - Sun, Jun 29

DCA

Washington

OPO

Porto

$929 Roundtrip, found 23 hours ago

$929

Roundtrip

found 23 hours ago

Select United flight, departing Fri, Jun 20 from Washington to Porto, returning Sun, Jun 29, priced at $929 found 23 hours ago