What airlines fly to Portugal?

United Airlines, British Airways and Air Canada are the top three most popular airlines that fly to Portugal from Houston according to our data. United Airlines is the first choice among our users, with 58% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 9 different airlines that fly to Portugal on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Houston to Portugal?

British Airways, Virgin Atlantic, and Air France are the most popular carriers operating from Houston to Portugal

When did momondo last update prices for flights from Houston to Portugal?

Prices for flights from Houston to Portugal refresh daily.

How many operators does momondo search for flights from Houston to Portugal?

There are 9 operators available for flights from Houston to Portugal as of December 2025.

How old do you have to be to fly from Houston to Portugal?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Houston to Portugal.

What documentation or ID do you need to fly to Portugal?

The necessary travel and health documents for your Portugal trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$264 Cheap Flights from Houston to Portugal in 2025/26

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Find the cheapest flights from Houston to Portugal

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

10:31 am - 8:10 am

IAH

LIS

15h 39m1 stop

5:00 am - 6:15 pm

LIS

IAH

19h 15m1 stop

$492Multiple Airlines

Tue, Feb 3 - Tue, Feb 10

12:29 pm - 8:10 am

IAH

LIS

13h 41m1 stop

1:40 pm - 8:31 pm

LIS

IAH

36h 51m2 stops

$508Brussels Airlines

Fri, Jan 16 - Wed, Jan 21

12:10 pm - 9:20 am

IAH

LIS

15h 10m1 stop

5:00 am - 9:44 pm

LIS

IAH

22h 44m2 stops

$515Multiple Airlines

Tue, Feb 3 - Tue, Feb 10

12:10 pm - 12:05 pm

IAH

OPO

17h 55m2 stops

6:00 am - 9:44 pm

OPO

IAH

21h 44m2 stops

$527Air Canada

Mon, Jan 19 - Tue, Feb 3

2:30 pm - 8:10 am

IAH

LIS

11h 40m1 stop

5:00 am - 6:15 pm

LIS

IAH

19h 15m1 stop

$528United Airlines

Thu, Jan 29 - Tue, Feb 3

12:10 pm - 7:55 am

IAH

LIS

13h 45m1 stop

5:00 am - 6:15 pm

LIS

IAH

19h 15m1 stop

$532United Airlines

Thu, Feb 5 - Mon, Feb 9

6:36 pm - 10:25 pm

HOU

LIS

21h 49m2 stops

7:05 am - 10:46 pm

LIS

HOU

21h 41m2 stops

$556British Airways

Fri, Jan 16 - Wed, Jan 21

11:09 am - 10:30 am

HOU

OPO

17h 21m2 stops

11:25 am - 4:28 pm

OPO

HOU

35h 03m2 stops

$582Delta

Wed, Feb 4 - Wed, Feb 11

3:50 pm - 3:25 pm

IAH

OPO

17h 35m1 stop

11:45 am - 1:15 pm

OPO

IAH

31h 30m1 stop

$600Delta

Wed, Apr 15 - Thu, Apr 30

6:36 pm - 5:55 pm

HOU

LIS

17h 19m2 stops

7:05 am - 10:46 pm

LIS

HOU

21h 41m2 stops

$626British Airways

Fri, Jan 16 - Wed, Jan 21

Brussels Airlines flights from Houston to Portugal

Our best Brussels Airlines deals on Houston to Portugal flight tickets

Brussels Airlines

Jan 16

IAH12:29 pmHouston George Bush Intcntl

13h 41m

1 stop

LIS8:10 amLisbon Humberto Delgado

Jan 21

LIS1:40 pmLisbon Humberto Delgado

36h 51m

2 stops

IAH8:31 pmHouston George Bush Intcntl

$508

Find similar

Brussels Airlines

Jan 16

IAH12:29 pmHouston George Bush Intcntl

13h 41m

1 stop

LIS8:10 amLisbon Humberto Delgado

Jan 21

LIS10:15 amLisbon Humberto Delgado

14h 31m

1 stop

IAH6:46 pmHouston George Bush Intcntl

$517

Find similar

Brussels Airlines

Jan 16

IAH11:55 amHouston George Bush Intcntl

18h 55m

2 stops

LIS12:50 pmLisbon Humberto Delgado

Jan 21

LIS10:15 amLisbon Humberto Delgado

14h 31m

1 stop

IAH6:46 pmHouston George Bush Intcntl

$584

Find similar

United Airlines flights from Houston to Portugal

Our best United Airlines deals on Houston to Portugal flight tickets

United Airlines

Jan 29

IAH2:30 pmHouston George Bush Intcntl

11h 40m

1 stop

LIS8:10 amLisbon Humberto Delgado

Feb 3

LIS5:00 amLisbon Humberto Delgado

19h 15m

1 stop

IAH6:15 pmHouston George Bush Intcntl

$528

Find similar

United Airlines

Feb 5

IAH12:10 pmHouston George Bush Intcntl

13h 45m

1 stop

LIS7:55 amLisbon Humberto Delgado

Feb 9

LIS5:00 amLisbon Humberto Delgado

19h 15m

1 stop

IAH6:15 pmHouston George Bush Intcntl

$532

Find similar

United Airlines

Mar 2

IAH1:25 pmHouston George Bush Intcntl

12h 45m

1 stop

LIS8:10 amLisbon Humberto Delgado

Mar 17

LIS5:00 amLisbon Humberto Delgado

19h 15m

1 stop

IAH7:15 pmHouston George Bush Intcntl

$533

Find similar

Fly from

Fly to

Route

Depart

Return

Price

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Tue 2/3

10:31 am-8:10 am

1 stop15h 39m

Lisbon Humberto Delgado

Tue 2/10

5:00 am-6:15 pm

1 stop19h 15m

$492

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Fri 1/16

12:29 pm-8:10 am

1 stop13h 41m

Lisbon Humberto Delgado

Wed 1/21

1:40 pm-8:31 pm

2 stops36h 51m

$508

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Tue 2/3

12:10 pm-9:20 am

1 stop15h 10m

Lisbon Humberto Delgado

Tue 2/10

5:00 am-9:44 pm

2 stops22h 44m

$515

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 1/19

12:10 pm-12:05 pm

2 stops17h 55m

Porto

Tue 2/3

6:00 am-9:44 pm

2 stops21h 44m

$527

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Thu 1/29

2:30 pm-8:10 am

1 stop11h 40m

Lisbon Humberto Delgado

Tue 2/3

5:00 am-6:15 pm

1 stop19h 15m

$528

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Thu 2/5

12:10 pm-7:55 am

1 stop13h 45m

Lisbon Humberto Delgado

Mon 2/9

5:00 am-6:15 pm

1 stop19h 15m

$532

HoustonLisbon

HOU - LIS

HOULIS

Houston Hobby

Fri 1/16

6:36 pm-10:25 pm

2 stops21h 49m

Lisbon Humberto Delgado

Wed 1/21

7:05 am-10:46 pm

2 stops21h 41m

$556

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Wed 2/4

11:09 am-10:30 am

2 stops17h 21m

Porto

Wed 2/11

11:25 am-4:28 pm

2 stops35h 03m

$582

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 4/15

3:50 pm-3:25 pm

1 stop17h 35m

Porto

Thu 4/30

11:45 am-1:15 pm

1 stop31h 30m

$600

HoustonLisbon

HOU - LIS

HOULIS

Houston Hobby

Fri 1/16

6:36 pm-5:55 pm

2 stops17h 19m

Lisbon Humberto Delgado

Wed 1/21

7:05 am-10:46 pm

2 stops21h 41m

$626

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Houston to Portugal

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Portugal?

The cheapest month to fly to Portugal from Houston is in February. Flight prices, which tend to average around $617, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Portugal from Houston during March instead. Flights to Portugal in March, while not as cheap as those in February, still average around $668.

What is the cheapest day to depart on your flight to Portugal?

According to our data, Sunday is the cheapest day to fly to Portugal from Houston. The lowest ticket price found for a Sunday departure recently was $825. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Portugal is Wednesday, with ticket prices averaging around $1,199.

What is the cheapest time of day to depart on your flight to Portugal?

Our most recent data shows that the best time of day to fly to Portugal is in the evening. Flights from Houston to Portugal during this time can be as low as $913. At noon is when there is more demand to fly to Portugal, so prices are often more expensive at around $1,116 per ticket.

How far in advance should I book a flight to Portugal?

You are more likely to see cheaper flights to Portugal from Houston when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around $854 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portugal from Houston for as low as $720 on momondo.

Cheap Houston to Portugal flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Houston to Portugal

Fastest flight time	13h 25m
Direct flights	None

The fastest flight from Houston to Portugal takes 13h 25m

There are no direct flights from Houston to Portugal. There are no popular flight routes from Houston to Portugal.

Search flight deals

When did momondo last update prices for flights from Houston to Portugal?
Prices for flights from Houston to Portugal refresh daily.
How many operators does momondo search for flights from Houston to Portugal?
There are 9 operators available for flights from Houston to Portugal as of December 2025.
How old do you have to be to fly from Houston to Portugal?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Houston to Portugal.
What documentation or ID do you need to fly to Portugal?
The necessary travel and health documents for your Portugal trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Houston to Portugal

Compare and see reviews for airlines that fly from Houston to Portugal with momondo

Airline	Rating	Free Cancellation	Price
KLM	PriceFrom $536	Free Cancellation	Rating 7.7 1,429 reviews	Search KLM flights
Air France	PriceFrom $540	Free Cancellation	Rating 7.4 1,509 reviews	Search Air France flights
Delta	PriceFrom $546	Free Cancellation	Rating 7.9 8,021 reviews	Search Delta flights
United Airlines	PriceFrom $583	Free Cancellation	Rating 7.4 9,099 reviews	Search United Airlines flights
British Airways	PriceFrom $588	Free Cancellation	Rating 6.7 7,600 reviews	Search British Airways flights
Air Canada	PriceFrom $597	Free Cancellation	Rating 7.1 10,549 reviews	Search Air Canada flights
Turkish Airlines	PriceFrom $621	Free Cancellation	Rating 7.3 4,108 reviews	Search Turkish Airlines flights
Lufthansa	PriceFrom $679	Free Cancellation	Rating 6.8 7,639 reviews	Search Lufthansa flights
American Airlines	PriceFrom $699	Free Cancellation	Rating 7.2 11,050 reviews	Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Houston to Portugal?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Houston to Portugal. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Houston to Portugal with flexible booking policies on momondo?

All flight searches from Houston to Portugal on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Houston to Portugal?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Houston to Portugal.

I’m not ready to book a flight from Houston to Portugal right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Portugal from Houston. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.