Flights from Houston to Porto

Cheapest flights from Houston

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.

Tue, Nov 4 - Tue, Nov 18

IAH

George Bush Intercontinental

OPO

Dr. Francisco de Sa Carneiro

$580 Roundtrip, found 1 day ago

$580

Roundtrip

found 1 day ago

Select United flight, departing Tue, Nov 4 from George Bush Intercontinental to Dr. Francisco de Sa Carneiro, returning Tue, Nov 18, priced at $580 found 1 day ago

Sun, Nov 16 - Wed, Dec 3

IAH

George Bush Intercontinental

OPO

Dr. Francisco de Sa Carneiro

$590 Roundtrip, found 1 day ago

$590

Roundtrip

found 1 day ago

Select United flight, departing Sun, Nov 16 from George Bush Intercontinental to Dr. Francisco de Sa Carneiro, returning Wed, Dec 3, priced at $590 found 1 day ago

Mon, Nov 24 - Fri, Dec 12

IAH

George Bush Intercontinental

OPO

Dr. Francisco de Sa Carneiro

$591 Roundtrip, found 1 day ago

$591

Roundtrip

found 1 day ago

Select United flight, departing Mon, Nov 24 from George Bush Intercontinental to Dr. Francisco de Sa Carneiro, returning Fri, Dec 12, priced at $591 found 1 day ago

Sat, Nov 1 - Tue, Nov 18

IAH

George Bush Intercontinental

OPO

Dr. Francisco de Sa Carneiro

$592 Roundtrip, found 1 day ago

$592

Roundtrip

found 1 day ago

Select United flight, departing Sat, Nov 1 from George Bush Intercontinental to Dr. Francisco de Sa Carneiro, returning Tue, Nov 18, priced at $592 found 1 day ago

Tue, Nov 4 - Wed, Nov 19

IAH

George Bush Intercontinental

OPO

Dr. Francisco de Sa Carneiro

$593 Roundtrip, found 1 day ago

$593

Roundtrip

found 1 day ago

Select United flight, departing Tue, Nov 4 from George Bush Intercontinental to Dr. Francisco de Sa Carneiro, returning Wed, Nov 19, priced at $593 found 1 day ago

Sat, Nov 15 - Wed, Dec 3

IAH

George Bush Intercontinental

OPO

Dr. Francisco de Sa Carneiro

$596 Roundtrip, found 1 day ago

$596

Roundtrip

found 1 day ago

Select United flight, departing Sat, Nov 15 from George Bush Intercontinental to Dr. Francisco de Sa Carneiro, returning Wed, Dec 3, priced at $596 found 1 day ago

Sat, Nov 1 - Wed, Nov 19

IAH

George Bush Intercontinental

OPO

Dr. Francisco de Sa Carneiro

$599 Roundtrip, found 1 day ago

$599

Roundtrip

found 1 day ago

Select United flight, departing Sat, Nov 1 from George Bush Intercontinental to Dr. Francisco de Sa Carneiro, returning Wed, Nov 19, priced at $599 found 1 day ago

Tue, Dec 2 - Tue, Dec 16

IAH

George Bush Intercontinental

OPO

Dr. Francisco de Sa Carneiro

$602 Roundtrip, found 1 day ago

$602

Roundtrip

found 1 day ago

Select United flight, departing Tue, Dec 2 from George Bush Intercontinental to Dr. Francisco de Sa Carneiro, returning Tue, Dec 16, priced at $602 found 1 day ago

Sat, Nov 8 - Thu, Nov 27

IAH

George Bush Intercontinental

OPO

Dr. Francisco de Sa Carneiro

$605 Roundtrip, found 1 day ago

$605

Roundtrip

found 1 day ago

Select United flight, departing Sat, Nov 8 from George Bush Intercontinental to Dr. Francisco de Sa Carneiro, returning Thu, Nov 27, priced at $605 found 1 day ago

Mon, Nov 3 - Mon, Nov 17

IAH

George Bush Intercontinental

OPO

Dr. Francisco de Sa Carneiro

$626 Roundtrip, found 1 day ago

$626

Roundtrip

found 1 day ago

Select Delta flight, departing Mon, Nov 3 from George Bush Intercontinental to Dr. Francisco de Sa Carneiro, returning Mon, Nov 17, priced at $626 found 1 day ago

Mon, Oct 13 - Tue, Oct 14

IAH

George Bush Intercontinental

OPO

Dr. Francisco de Sa Carneiro

$649 Roundtrip, found 1 day ago

$649

Roundtrip

found 1 day ago

Select British Airways flight, departing Mon, Oct 13 from George Bush Intercontinental to Dr. Francisco de Sa Carneiro, returning Tue, Oct 14, priced at $649 found 1 day ago

Sun, Nov 30 - Mon, Dec 15

IAH

George Bush Intercontinental

OPO

Dr. Francisco de Sa Carneiro

$677 Roundtrip, found 1 day ago

$677

Roundtrip

found 1 day ago

Select Air France flight, departing Sun, Nov 30 from George Bush Intercontinental to Dr. Francisco de Sa Carneiro, returning Mon, Dec 15, priced at $677 found 1 day ago

Mon, Oct 13 - Mon, Oct 27

IAH

George Bush Intercontinental

OPO

Dr. Francisco de Sa Carneiro

$720 Roundtrip, found 1 day ago

$720

Roundtrip

found 1 day ago

Select Lufthansa flight, departing Mon, Oct 13 from George Bush Intercontinental to Dr. Francisco de Sa Carneiro, returning Mon, Oct 27, priced at $720 found 1 day ago

Sat, Oct 25 - Wed, Nov 12

IAH

George Bush Intercontinental

OPO

Dr. Francisco de Sa Carneiro

$728 Roundtrip, found 1 day ago

$728

Roundtrip

found 1 day ago

Select KLM flight, departing Sat, Oct 25 from George Bush Intercontinental to Dr. Francisco de Sa Carneiro, returning Wed, Nov 12, priced at $728 found 1 day ago

Mon, May 11 - Sat, May 23

IAH

George Bush Intercontinental

OPO

Dr. Francisco de Sa Carneiro

$828 Roundtrip, found 1 day ago

$828

Roundtrip

found 1 day ago

Select American Airlines flight, departing Mon, May 11 from George Bush Intercontinental to Dr. Francisco de Sa Carneiro, returning Sat, May 23, priced at $828 found 1 day ago

Wed, Dec 3 - Fri, Dec 19

IAH

George Bush Intercontinental

OPO

Dr. Francisco de Sa Carneiro

$829 Roundtrip, found 1 day ago

$829

Roundtrip

found 1 day ago

Select Turkish Airlines flight, departing Wed, Dec 3 from George Bush Intercontinental to Dr. Francisco de Sa Carneiro, returning Fri, Dec 19, priced at $829 found 1 day ago

Mon, May 11 - Sat, May 23

IAH

George Bush Intercontinental

OPO

Dr. Francisco de Sa Carneiro

$1,038 Roundtrip, found 1 day ago

$1,038

Roundtrip

found 1 day ago

Select Air Canada flight, departing Mon, May 11 from George Bush Intercontinental to Dr. Francisco de Sa Carneiro, returning Sat, May 23, priced at $1,038 found 1 day ago

Mon, May 11 - Sat, May 23

IAH

George Bush Intercontinental

OPO

Dr. Francisco de Sa Carneiro

$1,106 Roundtrip, found 1 day ago

$1,106

Roundtrip

found 1 day ago

Select Iberia flight, departing Mon, May 11 from George Bush Intercontinental to Dr. Francisco de Sa Carneiro, returning Sat, May 23, priced at $1,106 found 1 day ago

Mon, May 11 - Sat, May 23

IAH

George Bush Intercontinental

OPO

Dr. Francisco de Sa Carneiro

$1,291 Roundtrip, found 1 day ago

$1,291

Roundtrip

found 1 day ago

Select Austrian Airlines flight, departing Mon, May 11 from George Bush Intercontinental to Dr. Francisco de Sa Carneiro, returning Sat, May 23, priced at $1,291 found 1 day ago

Mon, May 11 - Sat, May 23

IAH

George Bush Intercontinental

OPO

Dr. Francisco de Sa Carneiro

$1,368 Roundtrip, found 1 day ago

$1,368

Roundtrip

found 1 day ago

Select Swiss International Air Lines flight, departing Mon, May 11 from George Bush Intercontinental to Dr. Francisco de Sa Carneiro, returning Sat, May 23, priced at $1,368 found 1 day ago