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$239+ 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 2/1. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — LIS
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
1 adult, Economy
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Cheap 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 December 4, 2025.

This Gotogate deal was found by Cheapflights users on 12/2. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/318:10 amIAH - LIS
1 stop16h 45mBritish Airways
Thu 1/83:55 pmLIS - IAH
1 stop28h 10mBritish Airways
Deal found 12/2$641
This Air Canada deal was found by Cheapflights users on 12/3. 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.
Fri 12/1211:55 amIAH - LIS
1 stop15h 25mMultiple Airlines
Sun 12/2110:50 amLIS - IAH
2 stops16h 00mMultiple Airlines
Deal found 12/3$658
This United Airlines deal was found by Cheapflights users on 12/3. 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.
Fri 12/122:45 pmIAH - LIS
1 stop13h 30mUnited Airlines
Tue 12/2311:55 amLIS - IAH
1 stop16h 46mUnited Airlines
Deal found 12/3$659
This Orbitz deal was found by Cheapflights users on 12/2. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/273:50 pmIAH - LIS
1 stop24h 40mBritish Airways
Tue 1/1311:05 amLIS - IAH
1 stop17h 19mBritish Airways
Deal found 12/2$668
This KLM deal was found by Cheapflights users on 12/3. 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.
Fri 12/123:30 pmIAH - LIS
1 stop13h 05mKLM
Tue 12/239:30 amLIS - IAH
1 stop34h 00mKLM
Deal found 12/3$675
This CheapOair deal was found by Cheapflights users on 12/3. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/124:45 pmIAH - LIS
2 stops19h 10mBritish Airways
Mon 12/226:35 pmLIS - IAH
1 stop25h 30mBritish Airways
Deal found 12/3$686
This Kiwi.com deal was found by Cheapflights users on 12/2. 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.
Tue 12/211:55 amIAH - LIS
1 stop14h 15mMultiple Airlines
Tue 12/95:00 amLIS - IAH
1 stop19h 15mMultiple Airlines
Deal found 12/2$690
This KLM deal was found by Cheapflights users on 12/4. 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.
Sat 12/63:30 pmIAH - FNC
1 stop36h 05mKLM
Mon 12/1510:25 amFNC - IAH
1 stop33h 05mKLM
Deal found 12/4$791
This Turkish Airlines deal was found by Cheapflights users on 12/2. 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 12/62:55 pmIAH - OPO
1 stop37h 00mTurkish Airlines
Sat 12/134:10 pmOPO - IAH
1 stop27h 00mTurkish Airlines
Deal found 12/2$869
This Orbitz deal was found by Cheapflights users on 12/3. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/151:19 pmIAH - OPO
2 stops36h 21mIberia
Mon 12/228:40 pmOPO - IAH
2 stops32h 50mIberia
Deal found 12/3$872
This Expedia deal was found by Cheapflights users on 12/2. 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.
Sat 12/139:53 amIAH - OPO
2 stops15h 47mIberia
Sat 12/208:40 pmOPO - IAH
2 stops29h 46mIberia
Deal found 12/2$1,198
This United Airlines deal was found by Cheapflights users on 12/2. 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.
Sat 12/137:33 amIAH - OPO
2 stops25h 32mUnited Airlines
Sat 12/2012:30 pmOPO - IAH
1 stop32h 05mUnited Airlines
Deal found 12/2$1,201

Find 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 December 4, 2025.

Round-trip from

$461
(Kiwi.com)

One-way from

$239
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$877
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 ($211 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 December 4, 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

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Mon 1/12

8:00 pm-9:20 am

2 stops31h 20m

Lisbon Humberto Delgado

Wed 1/21

5:00 am-6:15 pm

1 stop19h 15m

$504

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Thu 2/19

12:10 pm-7:55 am

1 stop13h 45m

Lisbon Humberto Delgado

Fri 2/27

10:55 am-4:24 pm

2 stops35h 29m

$507

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Wed 3/4

3:30 pm-2:35 pm

1 stop17h 05m

Lisbon Humberto Delgado

Mon 3/9

11:25 am-2:30 pm

1 stop32h 05m

$510

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Wed 2/11

6:55 pm-3:40 pm

1 stop14h 45m

Lisbon Humberto Delgado

Thu 2/19

5:00 am-6:15 pm

1 stop19h 15m

$515

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Fri 1/30

1:35 pm-8:10 am

1 stop12h 35m

Lisbon Humberto Delgado

Tue 2/3

5:00 am-6:15 pm

1 stop19h 15m

$516

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Thu 2/26

4:50 pm-1:20 pm

1 stop14h 30m

Lisbon Humberto Delgado

Fri 3/6

5:00 am-6:15 pm

1 stop19h 15m

$519

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Thu 1/8

6:30 am-9:20 am

2 stops20h 50m

Lisbon Humberto Delgado

Thu 1/22

5:00 am-6:15 pm

1 stop19h 15m

$519

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Thu 1/8

12:10 pm-9:20 am

1 stop15h 10m

Lisbon Humberto Delgado

Thu 1/22

5:00 am-9:44 pm

2 stops22h 44m

$522

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Mon 1/12

12:49 pm-2:35 pm

2 stops19h 46m

Lisbon Humberto Delgado

Wed 1/21

5:00 am-5:40 pm

2 stops18h 40m

$525

HoustonFunchal

IAH - FNC

IAHFNC

Houston George Bush Intcntl

Sat 3/14

6:58 pm-9:35 am

2 stops33h 37m

Funchal Madeira

Sat 3/21

6:40 pm-9:36 pm

2 stops31h 56m

$556

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/2

Showing 1-10 of 30 results
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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, February is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Portugal (average of $515). Flying from Houston George Bush Intcntl Airport to Portugal in June is currently the most expensive (average of $875). 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 December 4, 2025.

It’s optimal to fly from Houston George Bush Intcntl Airport to Portugal in the evening. By choosing this option you can save up to 21% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from Houston George Bush Intcntl Airport to Portugal?

Use this chart to determine the cheapest time to fly round-trip from George Bush Intcntl to Portugal. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Houston George Bush Intcntl Airport to Portugal flight should consider departing on Thursday mornings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 December 4, 2025.
Read through reviews of airlines operating flights from Houston George Bush Intcntl Airport to Portugal, such as Delta, Air France, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,010 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.9

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
8,010 reviews
Delta
7.9
Good
8,010 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.9

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
1,500 reviews
Delta
7.9
Good
8,010 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.9

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
9,066 reviews
Delta
7.9
Good
8,010 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.9

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
10,500 reviews
Delta
7.9
Good
8,010 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.9

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
7,562 reviews
Delta
7.9
Good
8,010 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.9

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 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.

  • How long is the flight from Houston George Bush Intcntl Airport to Portugal?

    United Airlines, Air Canada, and KLM can get you from Houston George Bush Intcntl Airport to Portugal in just under 13h 45m. Your travel time can differ by up to 17h 35m. Houston George Bush Intcntl Airport and Portugal are separated by a distance of 4767 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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, February is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Portugal (average of $515). Flying from Houston George Bush Intcntl Airport to Portugal in June is currently the most expensive (average of $875). 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

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Alternative routes for George Bush Intcntl to Portugal

See prices for flight routes from nearby airports that may be better suited for you.
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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 December 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$536Average$832FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$549Average$840FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$562Average$946FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$571Average$1,016FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$601Average$904FlexibilityNo cancel feeOn-time70%
Turkish AirlinesCheapest$621Average$720FlexibilityNo cancel feeOn-time77%
DeltaCheapest$643Average$814FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$646Average$1,165FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$699Average$1,081FlexibilityNo cancel feeOn-time71%

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