Flights from Boston to Santo Antonio

Cheapest flights from Boston

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Sep 14 - Tue, Sep 16

BOS

Logan Intl.

LIS

Humberto Delgado

$425 Roundtrip, found 9 hours ago

$425

Roundtrip

found 9 hours ago

Select British Airways flight, departing Sun, Sep 14 from Logan Intl. to Humberto Delgado, returning Tue, Sep 16, priced at $425 found 9 hours ago

Sat, Nov 15 - Thu, Nov 27

BOS

Logan Intl.

LIS

Humberto Delgado

$476 Roundtrip, found 11 hours ago

$476

Roundtrip

found 11 hours ago

Select Icelandair flight, departing Sat, Nov 15 from Logan Intl. to Humberto Delgado, returning Thu, Nov 27, priced at $476 found 11 hours ago

Mon, Nov 10 - Tue, Nov 25

BOS

Logan Intl.

LIS

Humberto Delgado

$477 Roundtrip, found 11 hours ago

$477

Roundtrip

found 11 hours ago

Select Virgin Atlantic flight, departing Mon, Nov 10 from Logan Intl. to Humberto Delgado, returning Tue, Nov 25, priced at $477 found 11 hours ago

Sun, Sep 14 - Mon, Sep 15

BOS

Logan Intl.

LIS

Humberto Delgado

$478 Roundtrip, found 9 hours ago

$478

Roundtrip

found 9 hours ago

Select British Airways flight, departing Sun, Sep 14 from Logan Intl. to Humberto Delgado, returning Mon, Sep 15, priced at $478 found 9 hours ago

Tue, Nov 11 - Wed, Nov 26

BOS

Logan Intl.

LIS

Humberto Delgado

$479 Roundtrip, found 11 hours ago

$479

Roundtrip

found 11 hours ago

Select Scandinavian Airlines flight, departing Tue, Nov 11 from Logan Intl. to Humberto Delgado, returning Wed, Nov 26, priced at $479 found 11 hours ago

Wed, Oct 1 - Sun, Oct 26

BOS

Logan Intl.

LIS

Humberto Delgado

$484 Roundtrip, found 4 days ago

$484

Roundtrip

found 4 days ago

Select Icelandair flight, departing Wed, Oct 1 from Logan Intl. to Humberto Delgado, returning Sun, Oct 26, priced at $484 found 4 days ago

Sun, Aug 31 - Wed, Sep 10

BOS

Logan Intl.

LIS

Humberto Delgado

$491 Roundtrip, found 5 hours ago

$491

Roundtrip

found 5 hours ago

Select TAP Portugal flight, departing Sun, Aug 31 from Logan Intl. to Humberto Delgado, returning Wed, Sep 10, priced at $491 found 5 hours ago

Sun, Sep 7 - Tue, Sep 16

BOS

Logan Intl.

LIS

Humberto Delgado

$499 Roundtrip, found 9 hours ago

$499

Roundtrip

found 9 hours ago

Select United flight, departing Sun, Sep 7 from Logan Intl. to Humberto Delgado, returning Tue, Sep 16, priced at $499 found 9 hours ago

Sat, Feb 28 - Tue, Mar 31

BOS

Logan Intl.

LIS

Humberto Delgado

$501 Roundtrip, found 1 day ago

$501

Roundtrip

found 1 day ago

Select Delta flight, departing Sat, Feb 28 from Logan Intl. to Humberto Delgado, returning Tue, Mar 31, priced at $501 found 1 day ago

Mon, Sep 1 - Mon, Sep 8

BOS

Logan Intl.

LIS

Humberto Delgado

$505 Roundtrip, found 5 hours ago

$505

Roundtrip

found 5 hours ago

Select Air Canada flight, departing Mon, Sep 1 from Logan Intl. to Humberto Delgado, returning Mon, Sep 8, priced at $505 found 5 hours ago

Mon, Sep 8 - Mon, Sep 15

BOS

Logan Intl.

LIS

Humberto Delgado

$520 Roundtrip, found 2 days ago

$520

Roundtrip

found 2 days ago

Select Swiss International Air Lines flight, departing Mon, Sep 8 from Logan Intl. to Humberto Delgado, returning Mon, Sep 15, priced at $520 found 2 days ago

Sat, Feb 28 - Tue, Mar 31

BOS

Logan Intl.

LIS

Humberto Delgado

$553 Roundtrip, found 1 day ago

$553

Roundtrip

found 1 day ago

Select KLM flight, departing Sat, Feb 28 from Logan Intl. to Humberto Delgado, returning Tue, Mar 31, priced at $553 found 1 day ago

Sat, Feb 28 - Tue, Mar 31

BOS

Logan Intl.

LIS

Humberto Delgado

$554 Roundtrip, found 1 day ago

$554

Roundtrip

found 1 day ago

Select Lufthansa flight, departing Sat, Feb 28 from Logan Intl. to Humberto Delgado, returning Tue, Mar 31, priced at $554 found 1 day ago

Tue, Nov 11 - Sat, Nov 29

BOS

Logan Intl.

LIS

Humberto Delgado

$557 Roundtrip, found 11 hours ago

$557

Roundtrip

found 11 hours ago

Select SATA International-Azores Airlines S.A. flight, departing Tue, Nov 11 from Logan Intl. to Humberto Delgado, returning Sat, Nov 29, priced at $557 found 11 hours ago

Sat, Feb 28 - Tue, Mar 31

BOS

Logan Intl.

LIS

Humberto Delgado

$583 Roundtrip, found 1 day ago

$583

Roundtrip

found 1 day ago

Select Air France flight, departing Sat, Feb 28 from Logan Intl. to Humberto Delgado, returning Tue, Mar 31, priced at $583 found 1 day ago

Sat, Feb 28 - Tue, Mar 31

BOS

Logan Intl.

LIS

Humberto Delgado

$631 Roundtrip, found 1 day ago

$631

Roundtrip

found 1 day ago

Select American Airlines flight, departing Sat, Feb 28 from Logan Intl. to Humberto Delgado, returning Tue, Mar 31, priced at $631 found 1 day ago

Wed, Oct 1 - Sun, Oct 26

BOS

Logan Intl.

LIS

Humberto Delgado

$719 Roundtrip, found 4 days ago

$719

Roundtrip

found 4 days ago

Select Iberia flight, departing Wed, Oct 1 from Logan Intl. to Humberto Delgado, returning Sun, Oct 26, priced at $719 found 4 days ago

Thu, Nov 13 - Fri, Nov 28

BOS

Logan Intl.

LIS

Humberto Delgado

$742 Roundtrip, found 11 hours ago

$742

Roundtrip

found 11 hours ago

Select Aer Lingus flight, departing Thu, Nov 13 from Logan Intl. to Humberto Delgado, returning Fri, Nov 28, priced at $742 found 11 hours ago

Mon, Sep 8 - Mon, Sep 15

BOS

Logan Intl.

LIS

Humberto Delgado

$879 Roundtrip, found 2 days ago

$879

Roundtrip

found 2 days ago

Select Finnair flight, departing Mon, Sep 8 from Logan Intl. to Humberto Delgado, returning Mon, Sep 15, priced at $879 found 2 days ago

Mon, Sep 8 - Mon, Sep 15

BOS

Logan Intl.

LIS

Humberto Delgado

$1,101 Roundtrip, found 2 days ago

$1,101

Roundtrip

found 2 days ago

Select JetBlue Airways flight, departing Mon, Sep 8 from Logan Intl. to Humberto Delgado, returning Mon, Sep 15, priced at $1,101 found 2 days ago