HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portugal

$195+ Cheap flights from Houston to Portugal

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — LIS
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Houston to Portugal with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Houston to Portugal

Cheapest flights from Houston to Portugal
Explore the most affordable flight options available from Houston to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2026.

This Cheapflightsfares deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/43:50 pm
IAH
-
OPO
1 stop18h 55m
British Airways
Mon 2/912:25 pm
OPO
-
IAH
2 stops31h 26m
British Airways
Deal found 1/19$452
This Expedia deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/2710:35 am
HOU
-
OPO
2 stops15h 05m
Iberia
Mon 2/94:40 pm
OPO
-
HOU
2 stops23h 25m
Iberia
Deal found 1/20$461
This Expedia deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/2711:27 am
IAH
-
OPO
2 stops14h 13m
Iberia
Mon 2/94:40 pm
OPO
-
IAH
2 stops24h 07m
Iberia
Deal found 1/20$461
This Mytrip deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/412:10 pm
IAH
-
OPO
2 stops19h 05m
Multiple Airlines
Mon 2/94:15 pm
OPO
-
IAH
1 stop27h 55m
Multiple Airlines
Deal found 1/20$473
This Mytrip deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/107:10 am
IAH
-
OPO
2 stops30h 20m
Multiple Airlines
Mon 3/164:15 pm
OPO
-
IAH
1 stop27h 55m
Multiple Airlines
Deal found 1/19$486
This Expedia deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/106:40 pm
IAH
-
OPO
2 stops18h 05m
British Airways
Mon 3/165:30 pm
OPO
-
IAH
1 stop26h 35m
British Airways
Deal found 1/21$487
This Kiwi.com deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/14:30 pm
IAH
-
LIS
1 stop24h 20m
Lufthansa
Tue 2/173:55 pm
LIS
-
IAH
1 stop28h 15m
Lufthansa
Deal found 1/21$497
This Travelocity deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/43:50 pm
IAH
-
OPO
1 stop18h 55m
British Airways
Sun 2/88:20 am
OPO
-
IAH
2 stops20h 22m
British Airways
Deal found 1/20$498
This United Airlines deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/267:30 am
IAH
-
LIS
2 stops18h 40m
United Airlines
Tue 2/105:00 am
LIS
-
IAH
1 stop19h 15m
United Airlines
Deal found 1/19$499
This United Airlines deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/251:25 pm
IAH
-
OPO
1 stop14h 05m
United Airlines
Sun 3/16:00 am
OPO
-
IAH
1 stop18h 15m
United Airlines
Deal found 1/20$501
This United Airlines deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/181:25 pm
IAH
-
LIS
1 stop12h 45m
United Airlines
Wed 2/255:00 am
LIS
-
IAH
1 stop19h 15m
United Airlines
Deal found 1/19$504
This United Airlines deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/134:30 pm
IAH
-
LIS
1 stop15h 10m
United Airlines
Tue 4/215:05 am
LIS
-
IAH
1 stop18h 55m
United Airlines
Deal found 1/19$507

Find flight deals from Houston to Portugal

Keep the following information in mind while searching for Houston to Portugal flight deals. Data was last updated January 21, 2026.

Round-trip from

$452
(Cheapflightsfares)

One-way from

$195
(Expedia)

Popular in

June

Cheapest in

March

Average price

$736
From Houston to Portugal
Search Deals
One-way flight from Houston to Portugal
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($217 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Houston to Portugal that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2026.
Use the filters below to find and compare flights from Houston to Portugal that are best for you.

Fly from

Houston

Fly to

Portugal

Route

Depart

Return

Price

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 2/4

12:10 pm-1:15 pm

2 stops19h 05m

Porto

Mon 2/9

4:15 pm-2:10 pm

1 stop27h 55m

$473

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 2/25

2:35 pm-9:30 am

1 stop12h 55m

Porto

Sun 3/1

6:00 am-6:15 pm

1 stop18h 15m

$501

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Mon 2/23

7:25 am-10:15 am

1 stop20h 50m

Lisbon Humberto Delgado

Fri 3/6

5:00 am-6:15 pm

1 stop19h 15m

$504

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Tue 4/21

1:38 pm-10:30 am

2 stops14h 52m

Lisbon Humberto Delgado

Thu 4/30

5:05 am-6:00 pm

1 stop18h 55m

$508

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Sun 2/1

6:36 pm-8:10 am

1 stop31h 34m

Lisbon Humberto Delgado

Tue 2/17

5:00 am-10:40 pm

2 stops23h 40m

$509

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Wed 4/15

9:05 pm-11:15 pm

1 stop20h 10m

Lisbon Humberto Delgado

Tue 4/21

4:35 pm-7:18 pm

2 stops32h 43m

$510

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 3/10

8:23 am-9:30 am

2 stops20h 07m

Porto

Mon 3/16

12:30 pm-7:03 pm

2 stops35h 33m

$511

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 3/16

5:30 pm-10:25 pm

1 stop23h 55m

Porto

Mon 3/23

12:30 pm-3:10 pm

1 stop31h 40m

$512

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Sat 4/18

7:50 pm-10:30 am

1 stop32h 40m

Lisbon Humberto Delgado

Fri 5/1

1:00 pm-6:41 pm

1 stop35h 41m

$512

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Wed 2/18

1:25 pm-8:10 am

1 stop12h 45m

Lisbon Humberto Delgado

Wed 2/25

5:00 am-6:45 pm

2 stops19h 45m

$512

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Houston to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal from Houston with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Houston to Portugal

What is the cheapest month to book a flight from Houston to Portugal?

Currently, March is the cheapest month in which you can book a flight from Houston to Portugal (average of $477). Flying from Houston to Portugal in June is currently the most expensive (average of $824). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Portugal

Get insights into the airlines that provide service to Portugal. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portugal. Reviews last updated January 21, 2026.
Get a feel of what it's like to fly with Delta, Air France, and United Airlines from Houston to Portugal by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,088 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,088 reviews
Delta
7.9
Good
8,088 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Air France
7.4
Good
1,523 reviews
Delta
7.9
Good
8,088 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,191 reviews
Delta
7.9
Good
8,088 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Air Canada
7.1
Good
10,646 reviews
Delta
7.9
Good
8,088 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
British Airways
6.7
Okay
7,690 reviews
Delta
7.9
Good
8,088 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Houston to Portugal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Houston to Portugal?

    For as low as $501, United Airlines can have you in Portugal from Houston in 12h 55m. There are 4726 mi between Houston and Portugal. This flight may include one or multiple stops.

  • What are the most popular routes from Houston to Portugal?

    While some choose either Houston George Bush Intcntl - Lisbon Humberto Delgado or Houston Hobby - Porto, Houston Hobby - Lisbon Humberto Delgado is the most popular route from Houston to Portugal.

  • Can I find deals for flights from Houston to Portugal that include hotel bookings?

    Yes. In addition to deals on Houston to Portugal flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Houston to Portugal?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Houston to Portugal.

  • Can I find deals for business class flights from Houston to Portugal?

    Yes. Cheapflights offers flight deals from Houston to Portugal by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Houston to Portugal?

    Currently, March is the cheapest month in which you can book a flight from Houston to Portugal (average of $477). Flying from Houston to Portugal in June is currently the most expensive (average of $824). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Houston to Portugal

See prices for flight routes from nearby airports that may be better suited for you.
Dallas/Fort Worth to Heathrow flights
Dallas/Fort Worth to Leonardo da Vinci/Fiumicino flights
Dallas/Fort Worth to Charles de Gaulle flights
Hobby to Heathrow flights
Dallas/Fort Worth to Madrid flights
Hobby to Charles de Gaulle flights
Dallas/Fort Worth to Frankfurt flights
Dallas/Fort Worth to Barcelona-El Prat flights
Dallas/Fort Worth to Gatwick flights
George Bush Intcntl to Heathrow flights
Austin to Heathrow flights
Dallas/Fort Worth to Athens flights
Hobby to Leonardo da Vinci/Fiumicino flights
George Bush Intcntl to Charles de Gaulle flights
Hobby to Istanbul flights
Dallas/Fort Worth to Istanbul flights
Love Field to Heathrow flights
Dallas/Fort Worth to Orly flights
Dallas/Fort Worth to Dublin flights
Dallas/Fort Worth to Amsterdam flights
Hobby to Madrid flights
Dallas/Fort Worth to Malpensa flights
Hobby to Gatwick flights
Hobby to Frankfurt flights
Dallas/Fort Worth to Stansted flights
Hobby to Amsterdam flights
George Bush Intcntl to Istanbul flights
Love Field to Leonardo da Vinci/Fiumicino flights
Love Field to Charles de Gaulle flights
Dallas/Fort Worth to Lisbon flights
George Bush Intcntl to Amsterdam flights
George Bush Intcntl to Madrid flights
George Bush Intcntl to Frankfurt flights
George Bush Intcntl to Leonardo da Vinci/Fiumicino flights
George Bush Intcntl to Gatwick flights
Hobby to London City flights
Dallas/Fort Worth to Vicenza flights
Hobby to Linate flights
Dallas/Fort Worth to Edinburgh flights
Dallas/Fort Worth to Linate flights
Dallas/Fort Worth to London City flights
Hobby to Orly flights
Love Field to Madrid flights
Dallas/Fort Worth to Keflavik Intl flights
Love Field to Frankfurt flights
Hobby to Malpensa flights
Hobby to Athens flights
George Bush Intcntl to Orly flights
Hobby to Sabiha Gokcen flights
George Bush Intcntl to London City flights

Top 9 airlines flying from Houston to Portugal

Discover the top 9 airlines that operate flights from Houston to Portugal. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$494Average$987FlexibilityNo cancel feeOn-time75%
DeltaCheapest$546Average$868FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$570Average$825FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$575Average$966FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$588Average$908FlexibilityNo cancel feeOn-time70%
Turkish AirlinesCheapest$621Average$743FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$646Average$951FlexibilityNo cancel feeOn-time67%
LufthansaCheapest$679Average$1,336FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$699Average$1,005FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.