Cheap United flights San Francisco (SFO) to Porto (OPO)

Cheap United flights San Francisco (SFO) to Porto (OPO)

Prices were available within the past 7 days and start at for one-way flights and $687 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Aug 20 - Tue, Sep 2

SFO

San Francisco

OPO

Porto

$687 Roundtrip, found 1 day ago

$687

Roundtrip

found 1 day ago

Select United flight, departing Wed, Aug 20 from San Francisco to Porto, returning Tue, Sep 2, priced at $687 found 1 day ago

Sun, Aug 17 - Fri, Aug 29

SFO

San Francisco

OPO

Porto

$691 Roundtrip, found 1 day ago

$691

Roundtrip

found 1 day ago

Select United flight, departing Sun, Aug 17 from San Francisco to Porto, returning Fri, Aug 29, priced at $691 found 1 day ago

Tue, Aug 19 - Tue, Sep 2

SFO

San Francisco

OPO

Porto

$691 Roundtrip, found 1 day ago

$691

Roundtrip

found 1 day ago

Select United flight, departing Tue, Aug 19 from San Francisco to Porto, returning Tue, Sep 2, priced at $691 found 1 day ago

Tue, Aug 19 - Fri, Aug 29

SFO

San Francisco

OPO

Porto

$695 Roundtrip, found 1 day ago

$695

Roundtrip

found 1 day ago

Select United flight, departing Tue, Aug 19 from San Francisco to Porto, returning Fri, Aug 29, priced at $695 found 1 day ago

Wed, Aug 20 - Fri, Sep 5

SFO

San Francisco

OPO

Porto

$697 Roundtrip, found 1 day ago

$697

Roundtrip

found 1 day ago

Select United flight, departing Wed, Aug 20 from San Francisco to Porto, returning Fri, Sep 5, priced at $697 found 1 day ago

Tue, Aug 19 - Fri, Sep 5

SFO

San Francisco

OPO

Porto

$701 Roundtrip, found 1 day ago

$701

Roundtrip

found 1 day ago

Select United flight, departing Tue, Aug 19 from San Francisco to Porto, returning Fri, Sep 5, priced at $701 found 1 day ago

Wed, Aug 20 - Mon, Sep 1

SFO

San Francisco

OPO

Porto

$716 Roundtrip, found 1 day ago

$716

Roundtrip

found 1 day ago

Select United flight, departing Wed, Aug 20 from San Francisco to Porto, returning Mon, Sep 1, priced at $716 found 1 day ago

Tue, Aug 19 - Mon, Sep 1

SFO

San Francisco

OPO

Porto

$720 Roundtrip, found 1 day ago

$720

Roundtrip

found 1 day ago

Select United flight, departing Tue, Aug 19 from San Francisco to Porto, returning Mon, Sep 1, priced at $720 found 1 day ago

Wed, Aug 20 - Sun, Aug 31

SFO

San Francisco

OPO

Porto

$751 Roundtrip, found 1 day ago

$751

Roundtrip

found 1 day ago

Select United flight, departing Wed, Aug 20 from San Francisco to Porto, returning Sun, Aug 31, priced at $751 found 1 day ago

Tue, Aug 19 - Sun, Aug 31

SFO

San Francisco

OPO

Porto

$755 Roundtrip, found 1 day ago

$755

Roundtrip

found 1 day ago

Select United flight, departing Tue, Aug 19 from San Francisco to Porto, returning Sun, Aug 31, priced at $755 found 1 day ago

Sat, Aug 23 - Thu, Sep 4

SFO

San Francisco

OPO

Porto

$916 Roundtrip, found 1 day ago

$916

Roundtrip

found 1 day ago

Select United flight, departing Sat, Aug 23 from San Francisco to Porto, returning Thu, Sep 4, priced at $916 found 1 day ago

Fri, Aug 22 - Fri, Sep 5

SFO

San Francisco

OPO

Porto

$986 Roundtrip, found 1 day ago

$986

Roundtrip

found 1 day ago

Select United flight, departing Fri, Aug 22 from San Francisco to Porto, returning Fri, Sep 5, priced at $986 found 1 day ago