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

United Airlines, Delta, and KLM are the most popular carriers operating from Houston to Portugal

What airlines fly to Portugal?

United Airlines, British Airways and Delta 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 56% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 8 different airlines that fly to Portugal on a routine basis, so you have a few additional options to choose from.

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 8 operators available for flights from Houston to Portugal as of November 2026.

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.

$291 Cheap Flights from Houston to Portugal in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Houston to Portugal

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:55 am - 12:05 pmIAH Houston George Bush Intcntl-OPO Porto

18h 10m2 stops Montreal Pierre Elliott Trudeau Intl Brussels Bruxelles-National

7:20 pm - 9:34 pmOPO Porto-IAH Houston George Bush Intcntl

32h 14m2 stops Zurich Montreal Pierre Elliott Trudeau Intl

$699Multiple Airlines

Mon, Feb 8 - Mon, Feb 15

11:55 am - 12:05 pmIAH Houston George Bush Intcntl-OPO Porto

18h 10m2 stops Montreal Pierre Elliott Trudeau Intl Brussels Bruxelles-National

12:05 pm - 9:34 pmOPO Porto-IAH Houston George Bush Intcntl

39h 29m2 stops Zurich Montreal Pierre Elliott Trudeau Intl

$699Multiple Airlines

Tue, Feb 9 - Wed, Feb 17

5:05 pm - 3:25 pmIAH Houston George Bush Intcntl-OPO Porto

16h 20m1 stop Paris Charles de Gaulle

5:00 am - 1:15 pmOPO Porto-IAH Houston George Bush Intcntl

14h 15m1 stop Amsterdam Schiphol

$710KLM

Tue, Apr 13 - Fri, Apr 23

2:30 pm - 9:45 amIAH Houston George Bush Intcntl-OPO Porto

13h 15m1 stop Newark

6:00 am - 6:00 pmOPO Porto-IAH Houston George Bush Intcntl

18h 00m1 stop Frankfurt am Main

$711United Airlines

Tue, Apr 13 - Tue, Apr 20

2:21 pm - 9:30 amIAH Houston George Bush Intcntl-OPO Porto

13h 09m1 stop Newark

6:00 am - 6:15 pmOPO Porto-IAH Houston George Bush Intcntl

18h 15m1 stop Frankfurt am Main

$711United Airlines

Sun, Feb 28 - Wed, Mar 3

7:10 pm - 10:00 pmIAH Houston George Bush Intcntl-OPO Porto

20h 50m1 stop Paris Charles de Gaulle

4:10 pm - 1:05 pmOPO Porto-IAH Houston George Bush Intcntl

26h 55m1 stop Amsterdam Schiphol

$712KLM

Mon, Feb 8 - Mon, Feb 15

11:50 am - 9:20 amIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

15h 30m1 stop Montreal Pierre Elliott Trudeau Intl

11:25 am - 9:24 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

15h 59m1 stop Montreal Pierre Elliott Trudeau Intl

$731Air Canada

Wed, Apr 14 - Wed, Apr 21

4:10 pm - 2:50 pmIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

16h 40m1 stop Frankfurt am Main

5:00 am - 2:00 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

15h 00m1 stop Frankfurt am Main

$734Lufthansa

Wed, Feb 17 - Wed, Feb 24

11:55 am - 6:55 amIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

13h 00m1 stop Montreal Pierre Elliott Trudeau Intl

5:00 am - 9:09 amLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

34h 09m2 stops Frankfurt am Main Toronto Pearson Intl

$748Air Canada

Wed, Feb 17 - Wed, Feb 24

6:20 pm - 11:35 pmIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

23h 15m2 stops Chicago O'Hare Intl Frankfurt am Main

7:25 am - 12:14 amLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

22h 49m2 stops Frankfurt am Main Chicago O'Hare Intl

$775Lufthansa

Wed, Apr 14 - Thu, Apr 22

Cheap last minute flights

Enter your travel dates to find the best prices.

7:10 pm - 10:00 pmIAH Houston George Bush Intcntl-OPO Porto

20h 50m1 stop Paris Charles de Gaulle

5:00 am - 1:10 pmOPO Porto-IAH Houston George Bush Intcntl

14h 10m1 stop Amsterdam Schiphol

$805KLM

Wed, Nov 11 - Wed, Nov 18

12:30 pm - 10:35 amIAH Houston George Bush Intcntl-OPO Porto

16h 05m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

4:10 pm - 1:10 pmOPO Porto-IAH Houston George Bush Intcntl

27h 00m1 stop Amsterdam Schiphol

$809Multiple Airlines

Wed, Nov 11 - Wed, Nov 18

11:50 am - 6:55 amIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

13h 05m1 stop Montreal Pierre Elliott Trudeau Intl

5:00 am - 2:00 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

15h 00m1 stop Frankfurt am Main

$810United Airlines

Wed, Nov 11 - Thu, Nov 19

7:30 am - 8:10 amIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

18h 40m1 stop Newark

5:00 am - 6:15 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

19h 15m1 stop Frankfurt am Main

$811United Airlines

Tue, Nov 10 - Wed, Nov 18

5:05 pm - 11:30 pmIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

24h 25m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

5:00 am - 2:00 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

15h 00m1 stop Frankfurt am Main

$812Lufthansa

Tue, Nov 10 - Wed, Nov 18

12:00 pm - 11:30 pmIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

29h 30m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

12:25 pm - 12:30 amLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

18h 05m2 stops Frankfurt am Main Chicago O'Hare Intl

$816Lufthansa

Tue, Nov 10 - Wed, Nov 18

11:50 am - 1:15 pmIAH Houston George Bush Intcntl-OPO Porto

19h 25m2 stops Montreal Pierre Elliott Trudeau Intl Munich Franz Josef Strauss

6:00 am - 9:07 amOPO Porto-IAH Houston George Bush Intcntl

33h 07m2 stops Frankfurt am Main Toronto Pearson Intl

$817Air Canada

Wed, Nov 11 - Wed, Nov 18

3:50 pm - 12:05 pmIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

14h 15m1 stop London Heathrow

8:20 am - 8:12 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

17h 52m2 stops Madrid Barajas Chicago O'Hare Intl

$821Multiple Airlines

Wed, Nov 11 - Thu, Nov 19

10:00 am - 11:25 amIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

19h 25m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

5:00 am - 10:22 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

23h 22m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

$826Delta

Tue, Nov 10 - Wed, Nov 18

11:50 am - 10:45 amIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

16h 55m2 stops Montreal Pierre Elliott Trudeau Intl Madrid Barajas

9:00 am - 9:39 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

18h 39m2 stops Madrid Barajas Montreal Pierre Elliott Trudeau Intl

$9,680Air Canada

Wed, Nov 11 - Wed, Nov 18

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Air Canada flights from Houston to Portugal

Our best Air Canada deals on Houston to Portugal flight tickets

Air Canada

Feb 6

IAH11:55 amHouston George Bush Intcntl

41h 20m

2 stops

OPO11:15 amPorto

Feb 16

OPO6:00 amPorto

42h 40m

2 stops

IAH6:40 pmHouston George Bush Intcntl

$724

Air Canada

Apr 13

IAH12:00 pmHouston George Bush Intcntl

23h 35m

2 stops

OPO5:35 pmPorto

Apr 23

OPO8:40 amPorto

30h 25m

2 stops

IAH9:05 amHouston George Bush Intcntl

$729

Air Canada

Apr 13

IAH12:00 pmHouston George Bush Intcntl

23h 35m

2 stops

OPO5:35 pmPorto

Apr 23

OPO8:40 amPorto

30h 25m

2 stops

IAH9:05 amHouston George Bush Intcntl

$730

United Airlines flights from Houston to Portugal

Our best United Airlines deals on Houston to Portugal flight tickets

United Airlines

Feb 22

IAH6:00 amHouston George Bush Intcntl

21h 30m

1 stop

OPO9:30 amPorto

Feb 26

OPO6:00 amPorto

18h 15m

1 stop

IAH6:15 pmHouston George Bush Intcntl

$711

United Airlines

Feb 22

IAH6:00 amHouston George Bush Intcntl

21h 30m

1 stop

OPO9:30 amPorto

Feb 26

OPO6:00 amPorto

18h 15m

1 stop

IAH6:15 pmHouston George Bush Intcntl

$712

United Airlines

Feb 22

IAH11:55 amHouston George Bush Intcntl

15h 35m

2 stops

OPO9:30 amPorto

Feb 26

OPO6:00 amPorto

18h 15m

1 stop

IAH6:15 pmHouston George Bush Intcntl

$715

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HoustonPorto

IAH Houston George Bush Intcntl - OPO Porto

IAHOPO

Houston George Bush Intcntl

Mon 2/8

11:55 am-12:05 pm

2 stops18h 10m

Porto

Mon 2/15

7:20 pm-9:34 pm

2 stops32h 14m

$699

HoustonPorto

IAH Houston George Bush Intcntl - OPO Porto

IAHOPO

Houston George Bush Intcntl

Tue 2/9

11:55 am-12:05 pm

2 stops18h 10m

Porto

Wed 2/17

12:05 pm-9:34 pm

2 stops39h 29m

$699

Quickest round-trip

HoustonPorto

IAH Houston George Bush Intcntl - OPO Porto

IAHOPO

Houston George Bush Intcntl

Tue 4/13

5:05 pm-3:25 pm

1 stop16h 20m

Porto

Fri 4/23

5:00 am-1:15 pm

1 stop14h 15m

$710

HoustonPorto

IAH Houston George Bush Intcntl - OPO Porto

IAHOPO

Houston George Bush Intcntl

Tue 4/13

2:30 pm-9:45 am

1 stop13h 15m

Porto

Tue 4/20

6:00 am-6:00 pm

1 stop18h 00m

$711

HoustonPorto

IAH Houston George Bush Intcntl - OPO Porto

IAHOPO

Houston George Bush Intcntl

Sun 2/28

2:21 pm-9:30 am

1 stop13h 09m

Porto

Wed 3/3

6:00 am-6:15 pm

1 stop18h 15m

$711

HoustonPorto

IAH Houston George Bush Intcntl - OPO Porto

IAHOPO

Houston George Bush Intcntl

Mon 2/8

7:10 pm-10:00 pm

1 stop20h 50m

Porto

Mon 2/15

4:10 pm-1:05 pm

1 stop26h 55m

$712

HoustonLisbon

IAH Houston George Bush Intcntl - LIS Lisbon Humberto Delgado

IAHLIS

Houston George Bush Intcntl

Wed 4/14

11:50 am-9:20 am

1 stop15h 30m

Lisbon Humberto Delgado

Wed 4/21

11:25 am-9:24 pm

1 stop15h 59m

$731

HoustonLisbon

IAH Houston George Bush Intcntl - LIS Lisbon Humberto Delgado

IAHLIS

Houston George Bush Intcntl

Wed 2/17

4:10 pm-2:50 pm

1 stop16h 40m

Lisbon Humberto Delgado

Wed 2/24

5:00 am-2:00 pm

1 stop15h 00m

$734

HoustonLisbon

IAH Houston George Bush Intcntl - LIS Lisbon Humberto Delgado

IAHLIS

Houston George Bush Intcntl

Wed 2/17

11:55 am-6:55 am

1 stop13h 00m

Lisbon Humberto Delgado

Wed 2/24

5:00 am-9:09 am

2 stops34h 09m

$748

HoustonLisbon

IAH Houston George Bush Intcntl - LIS Lisbon Humberto Delgado

IAHLIS

Houston George Bush Intcntl

Wed 4/14

6:20 pm-11:35 pm

2 stops23h 15m

Lisbon Humberto Delgado

Thu 4/22

7:25 am-12:14 am

2 stops22h 49m

$775

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 $707, 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 January instead. Flights to Portugal in January, while not as cheap as those in February, still average around $716.

How far in advance should I book a flight from Houston 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 $950 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 $804 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

Best Price Found	$291
Fastest flight time	12h 50m
Direct flights	None

The best one-way flight to Portugal from Houston in the past 72 hours is $291. The best round-trip flight deal from Houston to Portugal found on momondo in the last 72 hours is $699.

The fastest flight from Houston to Portugal takes 12h 50m

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

Search flight deals

Frequently asked questions about flying 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 8 operators available for flights from Houston to Portugal as of November 2026.
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 $476	Free Cancellation	Rating 7.8 1,594 reviews	Search KLM flights
Air France	PriceFrom $512	Free Cancellation	Rating 7.5 1,647 reviews	Search Air France flights
Lufthansa	PriceFrom $529	Free Cancellation	Rating 6.8 8,294 reviews	Search Lufthansa flights
Delta	PriceFrom $541	Free Cancellation	Rating 7.8 8,699 reviews	Search Delta flights
British Airways	PriceFrom $561	Free Cancellation	Rating 6.7 8,285 reviews	Search British Airways flights
United Airlines	PriceFrom $600	Free Cancellation	Rating 7.3 10,472 reviews	Search United Airlines flights
Turkish Airlines	PriceFrom $621	Free Cancellation	Rating 7.4 4,469 reviews	Search Turkish Airlines flights
Air Canada	PriceFrom $704	Free Cancellation	Rating 7.1 11,876 reviews	Search Air Canada 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.

An easier way to manage your Portugal trip

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Popular cities

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Feeling lucky

Popular cities in Portugal

Flights to Lisbonfrom $358

Flights to Portofrom $399

Flights to Funchalfrom $594

Flights to Farofrom $577

Flights to Ponta Delgadafrom $401

Flights to Lajesfrom $312

Flights to Hortafrom $585

Flights to Pico Islandfrom $585

Flights to Porto Santofrom $931

Flights to Velasfrom $588

Cheap flights from Houston to Portugal from $291

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Houston to Portugal departing on 1/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Air Canada flights from Houston to Portugal

Our best Air Canada deals on Houston to Portugal flight tickets

United Airlines flights from Houston to Portugal

Our best United Airlines deals on Houston to Portugal flight tickets

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See travel insights to Portugal from

How to get the cheapest flight ticket from Houston to Portugal

What is the cheapest month to fly to Portugal?

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

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

What airlines fly to Portugal?

Cheap Houston to Portugal flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Houston to Portugal

Best airlines flying from Houston to Portugal

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

Why use momondo?

An easier way to manage your Portugal trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Portugal

Popular cities in Portugal

Popular flights according to clicks in the last 7 days on momondo

Portugal flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Portugal

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Portugal

List of cabin classes available on flights landing in Portugal. Availability may vary depending on flight origin and airline.

Complete your trip to Portugal

Explore popular destinations other users love

According to popular flight searches on momondo this year