$825 Cheap United flights Washington (IAD) to Porto (OPO)

$825 Cheap United flights Washington (IAD) to Porto (OPO)

Prices were available within the past 7 days and start at $825 for one-way flights and $1,122 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, May 18 - Sun, May 24

IAD

Washington

OPO

Porto

$1,122 Roundtrip, found 22 hours ago

$1,122

Roundtrip

found 22 hours ago

Select United flight, departing Mon, May 18 from Washington to Porto, returning Sun, May 24, priced at $1,122 found 22 hours ago

Sat, May 16 - Sun, May 24

IAD

Washington

OPO

Porto

$1,131 Roundtrip, found 22 hours ago

$1,131

Roundtrip

found 22 hours ago

Select United flight, departing Sat, May 16 from Washington to Porto, returning Sun, May 24, priced at $1,131 found 22 hours ago

Sun, May 17 - Mon, May 25

IAD

Washington

OPO

Porto

$1,203 Roundtrip, found 1 day ago

$1,203

Roundtrip

found 1 day ago

Select United flight, departing Sun, May 17 from Washington to Porto, returning Mon, May 25, priced at $1,203 found 1 day ago