Flights from Chicago to Porto

Cheapest flights from Chicago

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.

Mon, Aug 25 - Thu, Sep 4

ORD

O'Hare Intl.

OPO

Dr. Francisco de Sa Carneiro

$667 Roundtrip, found 1 day ago

$667

Roundtrip

found 1 day ago

Select United flight, departing Mon, Aug 25 from O'Hare Intl. to Dr. Francisco de Sa Carneiro, returning Thu, Sep 4, priced at $667 found 1 day ago

Mon, Aug 25 - Fri, Sep 5

ORD

O'Hare Intl.

OPO

Dr. Francisco de Sa Carneiro

$669 Roundtrip, found 1 day ago

$669

Roundtrip

found 1 day ago

Select British Airways flight, departing Mon, Aug 25 from O'Hare Intl. to Dr. Francisco de Sa Carneiro, returning Fri, Sep 5, priced at $669 found 1 day ago

Sun, Aug 24 - Thu, Sep 4

ORD

O'Hare Intl.

OPO

Dr. Francisco de Sa Carneiro

$671 Roundtrip, found 1 day ago

$671

Roundtrip

found 1 day ago

Select British Airways flight, departing Sun, Aug 24 from O'Hare Intl. to Dr. Francisco de Sa Carneiro, returning Thu, Sep 4, priced at $671 found 1 day ago

Wed, Aug 27 - Thu, Sep 4

ORD

O'Hare Intl.

OPO

Dr. Francisco de Sa Carneiro

$672 Roundtrip, found 1 day ago

$672

Roundtrip

found 1 day ago

Select United flight, departing Wed, Aug 27 from O'Hare Intl. to Dr. Francisco de Sa Carneiro, returning Thu, Sep 4, priced at $672 found 1 day ago

Mon, Aug 25 - Wed, Sep 3

ORD

O'Hare Intl.

OPO

Dr. Francisco de Sa Carneiro

$675 Roundtrip, found 1 day ago

$675

Roundtrip

found 1 day ago

Select United flight, departing Mon, Aug 25 from O'Hare Intl. to Dr. Francisco de Sa Carneiro, returning Wed, Sep 3, priced at $675 found 1 day ago

Sun, Aug 31 - Thu, Sep 4

ORD

O'Hare Intl.

OPO

Dr. Francisco de Sa Carneiro

$678 Roundtrip, found 1 day ago

$678

Roundtrip

found 1 day ago

Select British Airways flight, departing Sun, Aug 31 from O'Hare Intl. to Dr. Francisco de Sa Carneiro, returning Thu, Sep 4, priced at $678 found 1 day ago

Sun, Aug 24 - Wed, Sep 3

ORD

O'Hare Intl.

OPO

Dr. Francisco de Sa Carneiro

$679 Roundtrip, found 1 day ago

$679

Roundtrip

found 1 day ago

Select United flight, departing Sun, Aug 24 from O'Hare Intl. to Dr. Francisco de Sa Carneiro, returning Wed, Sep 3, priced at $679 found 1 day ago

Wed, Aug 27 - Fri, Sep 5

ORD

O'Hare Intl.

OPO

Dr. Francisco de Sa Carneiro

$683 Roundtrip, found 1 day ago

$683

Roundtrip

found 1 day ago

Select United flight, departing Wed, Aug 27 from O'Hare Intl. to Dr. Francisco de Sa Carneiro, returning Fri, Sep 5, priced at $683 found 1 day ago

Sun, Aug 24 - Tue, Sep 2

ORD

O'Hare Intl.

OPO

Dr. Francisco de Sa Carneiro

$723 Roundtrip, found 1 day ago

$723

Roundtrip

found 1 day ago

Select Delta flight, departing Sun, Aug 24 from O'Hare Intl. to Dr. Francisco de Sa Carneiro, returning Tue, Sep 2, priced at $723 found 1 day ago

Wed, Aug 27 - Fri, Sep 5

ORD

O'Hare Intl.

OPO

Dr. Francisco de Sa Carneiro

$870 Roundtrip, found 1 day ago

$870

Roundtrip

found 1 day ago

Select Swiss International Air Lines flight, departing Wed, Aug 27 from O'Hare Intl. to Dr. Francisco de Sa Carneiro, returning Fri, Sep 5, priced at $870 found 1 day ago

Wed, Aug 27 - Fri, Sep 5

ORD

O'Hare Intl.

OPO

Dr. Francisco de Sa Carneiro

$879 Roundtrip, found 1 day ago

$879

Roundtrip

found 1 day ago

Select Lufthansa flight, departing Wed, Aug 27 from O'Hare Intl. to Dr. Francisco de Sa Carneiro, returning Fri, Sep 5, priced at $879 found 1 day ago

Wed, Aug 27 - Fri, Sep 5

MDW

Midway Intl.

OPO

Dr. Francisco de Sa Carneiro

$964 Roundtrip, found 1 day ago

$964

Roundtrip

found 1 day ago

Select Delta flight, departing Wed, Aug 27 from Midway Intl. to Dr. Francisco de Sa Carneiro, returning Fri, Sep 5, priced at $964 found 1 day ago

Wed, Aug 27 - Fri, Sep 5

ORD

O'Hare Intl.

OPO

Dr. Francisco de Sa Carneiro

$1,011 Roundtrip, found 1 day ago

$1,011

Roundtrip

found 1 day ago

Select American Airlines flight, departing Wed, Aug 27 from O'Hare Intl. to Dr. Francisco de Sa Carneiro, returning Fri, Sep 5, priced at $1,011 found 1 day ago

Wed, Aug 27 - Fri, Sep 5

ORD

O'Hare Intl.

OPO

Dr. Francisco de Sa Carneiro

$1,033 Roundtrip, found 1 day ago

$1,033

Roundtrip

found 1 day ago

Select TAP Portugal flight, departing Wed, Aug 27 from O'Hare Intl. to Dr. Francisco de Sa Carneiro, returning Fri, Sep 5, priced at $1,033 found 1 day ago

Wed, Aug 27 - Fri, Sep 5

ORD

O'Hare Intl.

OPO

Dr. Francisco de Sa Carneiro

$1,075 Roundtrip, found 1 day ago

$1,075

Roundtrip

found 1 day ago

Select Air Canada flight, departing Wed, Aug 27 from O'Hare Intl. to Dr. Francisco de Sa Carneiro, returning Fri, Sep 5, priced at $1,075 found 1 day ago

Wed, Aug 27 - Fri, Sep 5

ORD

O'Hare Intl.

OPO

Dr. Francisco de Sa Carneiro

$1,075 Roundtrip, found 1 day ago

$1,075

Roundtrip

found 1 day ago

Select KLM flight, departing Wed, Aug 27 from O'Hare Intl. to Dr. Francisco de Sa Carneiro, returning Fri, Sep 5, priced at $1,075 found 1 day ago

Thu, Aug 28 - Fri, Sep 5

MDW

Midway Intl.

OPO

Dr. Francisco de Sa Carneiro

$1,191 Roundtrip, found 1 day ago

$1,191

Roundtrip

found 1 day ago

Select Air France flight, departing Thu, Aug 28 from Midway Intl. to Dr. Francisco de Sa Carneiro, returning Fri, Sep 5, priced at $1,191 found 1 day ago

Wed, Aug 27 - Fri, Sep 5

ORD

O'Hare Intl.

OPO

Dr. Francisco de Sa Carneiro

$1,239 Roundtrip, found 1 day ago

$1,239

Roundtrip

found 1 day ago

Select Iberia flight, departing Wed, Aug 27 from O'Hare Intl. to Dr. Francisco de Sa Carneiro, returning Fri, Sep 5, priced at $1,239 found 1 day ago

Thu, Aug 28 - Fri, Sep 5

ORD

O'Hare Intl.

OPO

Dr. Francisco de Sa Carneiro

$1,249 Roundtrip, found 1 day ago

$1,249

Roundtrip

found 1 day ago

Select Scandinavian Airlines flight, departing Thu, Aug 28 from O'Hare Intl. to Dr. Francisco de Sa Carneiro, returning Fri, Sep 5, priced at $1,249 found 1 day ago

Thu, Aug 28 - Fri, Sep 5

ORD

O'Hare Intl.

OPO

Dr. Francisco de Sa Carneiro

$1,449 Roundtrip, found 1 day ago

$1,449

Roundtrip

found 1 day ago

Select Brussels Airlines flight, departing Thu, Aug 28 from O'Hare Intl. to Dr. Francisco de Sa Carneiro, returning Fri, Sep 5, priced at $1,449 found 1 day ago