HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portugal

$298+ Cheap flights from George Bush Intcntl (IAH) 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 7/16. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — LIS
May 4 — May 111
Sun 5/4
Sun 5/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from George Bush Intcntl 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 George Bush Intcntl to Portugal

Keep the following information in mind while searching for George Bush Intcntl to Portugal flight deals. Data was last updated April 29, 2025.

Round-trip from

$772
(oojo)

One-way from

$298
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$820
From Houston George Bush Intcntl to Portugal
Search Deals
One-way flight from Houston George Bush Intcntl to Portugal
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($213 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find flight deals from George Bush Intcntl to Portugal

Cheapest flights from George Bush Intcntl to Portugal
Explore the most affordable flight options available from George Bush Intcntl to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2025.

This Air France deal was found by Cheapflights users on 4/29. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/64:10 pmIAH - OPO
1 stop12h 40mMultiple Airlines
Sun 11/94:10 pmOPO - IAH
1 stop27h 20mMultiple Airlines
Deal found 4/29$744
This Air Canada deal was found by Cheapflights users on 4/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/612:05 pmIAH - OPO
2 stops24h 35mAir Canada
Sun 11/96:00 amOPO - IAH
2 stops21h 14mAir Canada
Deal found 4/29$746
This oojo deal was found by Cheapflights users on 4/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/59:00 pmIAH - OPO
1 stop31h 05mTurkish Airlines
Thu 8/2111:05 amOPO - IAH
1 stop31h 35mTurkish Airlines
Deal found 4/28$772
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Tue 8/51:38 pmIAH - OPO
1 stop12h 07mUnited Airlines
Thu 8/2112:10 pmOPO - IAH
2 stops30h 16mUnited Airlines
Deal found 4/28$779
This Kiwi.com deal was found by Cheapflights users on 4/28. 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.
Mon 5/196:44 pmIAH - LIS
1 stop28h 46mMultiple Airlines
Tue 6/36:05 amLIS - IAH
2 stops32h 40mMultiple Airlines
Deal found 4/28$820
This KLM deal was found by Cheapflights users on 4/28. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/75:50 pmIAH - OPO
2 stops15h 45mKLM
Thu 10/166:30 amOPO - IAH
1 stop36h 45mKLM
Deal found 4/28$824
This British Airways deal was found by Cheapflights users on 4/28. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/301:13 pmIAH - LIS
2 stops19h 12mBritish Airways
Mon 10/65:05 pmLIS - IAH
1 stop26h 40mBritish Airways
Deal found 4/28$835
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Sun 8/1010:00 amIAH - LIS
1 stop17h 20mUnited Airlines
Sun 8/2412:55 pmLIS - IAH
2 stops30h 34mUnited Airlines
Deal found 4/28$853
This Justfly.com deal was found by Cheapflights users on 4/28. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1010:00 amIAH - LIS
1 stop17h 20mAir Canada
Sat 8/239:50 amLIS - IAH
1 stop15h 46mAir Canada
Deal found 4/28$859
This Delta deal was found by Cheapflights users on 4/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1012:39 pmIAH - LIS
2 stops16h 06mDelta
Sat 8/2312:45 pmLIS - IAH
2 stops17h 09mDelta
Deal found 4/28$878
This Turkish Airlines deal was found by Cheapflights users on 4/28. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/239:00 pmIAH - LIS
1 stop20h 35mTurkish Airlines
Sat 9/64:45 pmLIS - IAH
1 stop32h 20mTurkish Airlines
Deal found 4/28$886
This Priceline deal was found by Cheapflights users on 4/29. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/146:32 pmIAH - OPO
2 stops15h 23mIberia
Sun 8/2412:20 pmOPO - IAH
2 stops17h 56mIberia
Deal found 4/29$887

Cheapflights Fare Finder

Customize your flight search to find flights from George Bush Intcntl 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 April 29, 2025.
Use the filters below to find and compare flights from Houston George Bush Intcntl Airport to Portugal that are best for you.

Fly from

George Bush Intcntl

Fly to

Portugal

Route

Depart

Return

Price

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 8/5

9:00 pm-10:05 am

1 stop31h 05m

Porto

Thu 8/21

11:05 am-12:40 pm

1 stop31h 35m

$772

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 8/5

1:38 pm-7:45 am

1 stop12h 07m

Porto

Thu 8/21

12:10 pm-12:26 pm

2 stops30h 16m

$779

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 8/5

6:15 pm-9:20 am

2 stops33h 05m

Porto

Thu 8/21

12:10 pm-8:49 am

2 stops26h 39m

$800

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Mon 5/19

6:44 pm-5:30 am

1 stop28h 46m

Lisbon Humberto Delgado

Tue 6/3

6:05 am-8:45 am

2 stops32h 40m

$820

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 10/7

5:50 pm-3:35 pm

2 stops15h 45m

Porto

Thu 10/16

6:30 am-1:15 pm

1 stop36h 45m

$824

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Tue 9/30

1:13 pm-2:25 pm

2 stops19h 12m

Lisbon Humberto Delgado

Mon 10/6

5:05 pm-1:45 pm

1 stop26h 40m

$835

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sat 5/17

8:00 am-7:15 pm

2 stops29h 15m

Porto

Fri 5/23

7:35 am-11:01 pm

2 stops21h 26m

$851

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Sun 8/10

10:00 am-9:20 am

1 stop17h 20m

Lisbon Humberto Delgado

Sun 8/24

12:55 pm-1:29 pm

2 stops30h 34m

$853

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Sun 8/10

10:00 am-9:20 am

1 stop17h 20m

Lisbon Humberto Delgado

Sat 8/23

9:50 am-7:36 pm

1 stop15h 46m

$859

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Sun 8/10

12:39 pm-10:45 am

2 stops16h 06m

Lisbon Humberto Delgado

Sat 8/23

12:45 pm-11:54 pm

2 stops17h 09m

$878

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 44 results
1
2
3
...
5

Best time to book a flight from George Bush Intcntl to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal from George Bush Intcntl 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 George Bush Intcntl Airport to Portugal

What is the cheapest month to book a flight from Houston George Bush Intcntl Airport to Portugal?

Currently, January is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Portugal (average of $612). Flying from Houston George Bush Intcntl Airport to Portugal in June is currently the most expensive (average of $1,178). 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.

What is the cheapest time of day to fly from IAH to PT?

Find hourly flight availability from George Bush Intcntl to Portugal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 29, 2025.

When flying from Houston George Bush Intcntl Airport to Portugal, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Portugal by month

Plan your trip to Portugal by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Portugal ranges from 0.2 - 4.8 inches per month. December is typically the wettest month, when rainfall can reach 4.8 in. July is typically the driest time to visit Portugal when rainfall is around 0.2 in.

Temperature in Portugal by month

Plan your trip to Portugal by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Portugal, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

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 April 29, 2025.
Read through reviews of airlines operating flights from Houston to Portugal, such as Delta, KLM and Finnair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,936 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,936 reviews
Delta
8.0
Very good
7,936 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
7,936 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,273 reviews
Delta
8.0
Very good
7,936 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,588 reviews
Delta
8.0
Very good
7,936 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air France
7.4
Good
1,446 reviews
Delta
8.0
Very good
7,936 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

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

  • What are the cheapest airlines to fly from Houston George Bush Intcntl Airport to Portugal one-way?

    The cheapest airline one-way is Aer Lingus, with whom users have recently found tickets for as low as $579. However, be on the lookout for offers from Finnair and British Airways, as they are both options that can get you from Houston George Bush Intcntl Airport to Portugal for a low price.

  • What are the most popular routes from Houston George Bush Intcntl Airport to Portugal?

    The most popular flight routes from Houston George Bush Intcntl Airport to Portugal are Houston George Bush Intcntl - Lisbon Humberto Delgado, Houston George Bush Intcntl - Porto and Houston George Bush Intcntl - Funchal Madeira.

  • Can I find deals for flights from George Bush Intcntl to Portugal that include hotel bookings?

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

  • How can I find direct flights from George Bush Intcntl to Portugal?

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

  • Can I find deals for business class flights from George Bush Intcntl to Portugal?

    Yes. Cheapflights offers flight deals from George Bush Intcntl 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 George Bush Intcntl Airport to Portugal?

    Currently, January is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Portugal (average of $612). Flying from Houston George Bush Intcntl Airport to Portugal in June is currently the most expensive (average of $1,178). 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 George Bush Intcntl to Portugal

See prices for flight routes from nearby airports that may be better suited for you.
Hobby to Heathrow flights
George Bush Intcntl to Heathrow flights
Hobby to Charles de Gaulle flights
Hobby to Istanbul flights
George Bush Intcntl to Istanbul flights
George Bush Intcntl to Charles de Gaulle flights
Hobby to Leonardo da Vinci/Fiumicino flights
Hobby to Madrid flights
Hobby to Frankfurt flights
Hobby to Gatwick flights
Hobby to Athens flights
Hobby to London City flights
George Bush Intcntl to Gatwick flights
Hobby to Orly 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 London City flights
George Bush Intcntl to Athens flights
Hobby to Barcelona-El Prat flights
Hobby to Munich flights
Hobby to Lisbon flights
George Bush Intcntl to Munich flights
Hobby to Sabiha Gokcen flights
Hobby to Amsterdam flights
George Bush Intcntl to Orly flights
George Bush Intcntl to Barcelona-El Prat flights
Hobby to Vicenza flights
Hobby to Dublin flights
George Bush Intcntl to Sabiha Gokcen flights
George Bush Intcntl to Amsterdam flights
George Bush Intcntl to Lisbon flights
Hobby to Malpensa flights
Hobby to Zurich flights
Hobby to Linate flights
George Bush Intcntl to Dublin flights
George Bush Intcntl to Vicenza flights
Hobby to Keflavik Intl flights
Hobby to Luqa flights
George Bush Intcntl to Luqa flights
George Bush Intcntl to Zurich flights
Hobby to Oslo Gardermoen flights
George Bush Intcntl to Malpensa flights
Hobby to Bruxelles-National flights
Hobby to Manchester flights
Hobby to Edinburgh flights
George Bush Intcntl to Linate flights
Hobby to Florence flights
Hobby to Copenhagen flights
George Bush Intcntl to Keflavik Intl flights

Top 9 airlines flying from George Bush Intcntl to Portugal

Discover the top 9 airlines that operate flights from George Bush Intcntl 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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$494Average$983FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$549Average$938FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$563Average$976FlexibilityNo cancel feeOn-time67%
British AirwaysCheapest$585Average$865FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$589Average$1,071FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$595Average$1,126FlexibilityNo cancel feeOn-time71%
KLMCheapest$629Average$964FlexibilityNo cancel feeOn-time75%
Turkish AirlinesCheapest$655Average$702FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$679Average$1,404FlexibilityNo cancel feeOn-time76%

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.