$574 Cheap United flights Boston (BOS) to Porto (OPO)

$574 Cheap United flights Boston (BOS) to Porto (OPO)

Prices were available within the past 7 days and start at $574 for one-way flights and $434 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Sep 15 - Tue, Sep 23

BOS

Boston

OPO

Porto

$434 Roundtrip, found 1 day ago

$434

Roundtrip

found 1 day ago

Select United flight, departing Mon, Sep 15 from Boston to Porto, returning Tue, Sep 23, priced at $434 found 1 day ago

Mon, Sep 15 - Wed, Sep 24

BOS

Boston

OPO

Porto

$439 Roundtrip, found 1 day ago

$439

Roundtrip

found 1 day ago

Select United flight, departing Mon, Sep 15 from Boston to Porto, returning Wed, Sep 24, priced at $439 found 1 day ago

Tue, Sep 9 - Wed, Sep 24

BOS

Boston

OPO

Porto

$443 Roundtrip, found 1 day ago

$443

Roundtrip

found 1 day ago

Select United flight, departing Tue, Sep 9 from Boston to Porto, returning Wed, Sep 24, priced at $443 found 1 day ago

Mon, Sep 15 - Sun, Sep 21

BOS

Boston

OPO

Porto

$494 Roundtrip, found 1 day ago

$494

Roundtrip

found 1 day ago

Select United flight, departing Mon, Sep 15 from Boston to Porto, returning Sun, Sep 21, priced at $494 found 1 day ago

Mon, Sep 15 - Sat, Sep 27

BOS

Boston

OPO

Porto

$499 Roundtrip, found 1 day ago

$499

Roundtrip

found 1 day ago

Select United flight, departing Mon, Sep 15 from Boston to Porto, returning Sat, Sep 27, priced at $499 found 1 day ago

Mon, Sep 15 - Mon, Sep 22

BOS

Boston

OPO

Porto

$502 Roundtrip, found 1 day ago

$502

Roundtrip

found 1 day ago

Select United flight, departing Mon, Sep 15 from Boston to Porto, returning Mon, Sep 22, priced at $502 found 1 day ago

Tue, Sep 9 - Sat, Sep 27

BOS

Boston

OPO

Porto

$503 Roundtrip, found 1 day ago

$503

Roundtrip

found 1 day ago

Select United flight, departing Tue, Sep 9 from Boston to Porto, returning Sat, Sep 27, priced at $503 found 1 day ago

Tue, Sep 9 - Mon, Sep 22

BOS

Boston

OPO

Porto

$507 Roundtrip, found 1 day ago

$507

Roundtrip

found 1 day ago

Select United flight, departing Tue, Sep 9 from Boston to Porto, returning Mon, Sep 22, priced at $507 found 1 day ago

Fri, Sep 12 - Tue, Sep 23

BOS

Boston

OPO

Porto

$509 Roundtrip, found 1 day ago

$509

Roundtrip

found 1 day ago

Select United flight, departing Fri, Sep 12 from Boston to Porto, returning Tue, Sep 23, priced at $509 found 1 day ago