$575 Cheap United flights Boston (BOS) to Porto (OPO)

$575 Cheap United flights Boston (BOS) to Porto (OPO)

Prices were available within the past 7 days and start at $575 for one-way flights and $688 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Aug 11 - Thu, Aug 20

BOS

Boston

OPO

Porto

$688 Roundtrip, found 19 hours ago

$688

Roundtrip

found 19 hours ago

Select United flight, departing Tue, Aug 11 from Boston to Porto, returning Thu, Aug 20, priced at $688 found 19 hours ago

Tue, Aug 11 - Fri, Sep 4

BOS

Boston

OPO

Porto

$689 Roundtrip, found 19 hours ago

$689

Roundtrip

found 19 hours ago

Select United flight, departing Tue, Aug 11 from Boston to Porto, returning Fri, Sep 4, priced at $689 found 19 hours ago

Fri, Aug 21 - Fri, Nov 6

BOS

Boston

OPO

Porto

$719 Roundtrip, found 5 days ago

$719

Roundtrip

found 5 days ago

Select United flight, departing Fri, Aug 21 from Boston to Porto, returning Fri, Nov 6, priced at $719 found 5 days ago

Sat, Aug 15 - Tue, Sep 1

BOS

Boston

OPO

Porto

$748 Roundtrip, found 19 hours ago

$748

Roundtrip

found 19 hours ago

Select United flight, departing Sat, Aug 15 from Boston to Porto, returning Tue, Sep 1, priced at $748 found 19 hours ago

Sat, Aug 15 - Fri, Sep 4

BOS

Boston

OPO

Porto

$749 Roundtrip, found 19 hours ago

$749

Roundtrip

found 19 hours ago

Select United flight, departing Sat, Aug 15 from Boston to Porto, returning Fri, Sep 4, priced at $749 found 19 hours ago

Fri, Aug 14 - Fri, Sep 4

BOS

Boston

OPO

Porto

$750 Roundtrip, found 19 hours ago

$750

Roundtrip

found 19 hours ago

Select United flight, departing Fri, Aug 14 from Boston to Porto, returning Fri, Sep 4, priced at $750 found 19 hours ago

Tue, Aug 11 - Mon, Sep 7

BOS

Boston

OPO

Porto

$753 Roundtrip, found 19 hours ago

$753

Roundtrip

found 19 hours ago

Select United flight, departing Tue, Aug 11 from Boston to Porto, returning Mon, Sep 7, priced at $753 found 19 hours ago

Fri, Aug 14 - Fri, Sep 4

BOS

Boston

OPO

Porto

$754 Roundtrip, found 19 hours ago

$754

Roundtrip

found 19 hours ago

Select United flight, departing Fri, Aug 14 from Boston to Porto, returning Fri, Sep 4, priced at $754 found 19 hours ago

Fri, Aug 14 - Fri, Sep 4

BOS

Boston

OPO

Porto

$759 Roundtrip, found 19 hours ago

$759

Roundtrip

found 19 hours ago

Select United flight, departing Fri, Aug 14 from Boston to Porto, returning Fri, Sep 4, priced at $759 found 19 hours ago

Fri, Aug 14 - Fri, Sep 4

BOS

Boston

OPO

Porto

$761 Roundtrip, found 19 hours ago

$761

Roundtrip

found 19 hours ago

Select United flight, departing Fri, Aug 14 from Boston to Porto, returning Fri, Sep 4, priced at $761 found 19 hours ago

Fri, Aug 14 - Fri, Sep 4

BOS

Boston

OPO

Porto

$761 Roundtrip, found 19 hours ago

$761

Roundtrip

found 19 hours ago

Select United flight, departing Fri, Aug 14 from Boston to Porto, returning Fri, Sep 4, priced at $761 found 19 hours ago