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$226+ 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 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — LIS
Feb 4 — Feb 111
Wed 2/4
Wed 2/11
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 January 5, 2026.

This KLM deal was found by Cheapflights users on 1/4. 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.
Mon 4/203:50 pmIAH - OPO
1 stop17h 35mKLM
Thu 4/235:00 amOPO - IAH
1 stop14h 15mKLM
Deal found 1/4$489
This Kiwi.com deal was found by Cheapflights users on 1/2. 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.
Thu 2/512:09 pmIAH - LIS
1 stop14h 01mMultiple Airlines
Wed 2/185:00 amLIS - IAH
1 stop19h 15mMultiple Airlines
Deal found 1/2$496
This Kiwi.com deal was found by Cheapflights users on 1/2. 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.
Thu 2/1911:55 amIAH - LIS
1 stop14h 15mMultiple Airlines
Tue 2/245:00 amLIS - IAH
1 stop19h 15mMultiple Airlines
Deal found 1/2$497
This Delta deal was found by Cheapflights users on 1/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/204:59 pmIAH - OPO
2 stops19h 11mDelta
Thu 4/235:00 amOPO - IAH
1 stop14h 15mDelta
Deal found 1/4$499
This Kiwi.com deal was found by Cheapflights users on 1/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/44:20 pmIAH - LIS
2 stops16h 15mMultiple Airlines
Thu 3/126:10 amLIS - IAH
1 stop16h 20mMultiple Airlines
Deal found 1/4$508
This Kiwi.com deal was found by Cheapflights users on 1/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/2311:55 amIAH - OPO
1 stop15h 35mMultiple Airlines
Wed 3/116:00 amOPO - IAH
1 stop18h 15mMultiple Airlines
Deal found 1/4$509
This Kiwi.com deal was found by Cheapflights users on 1/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/44:30 pmIAH - LIS
1 stop16h 20mLufthansa
Thu 3/126:10 amLIS - IAH
1 stop16h 20mLufthansa
Deal found 1/4$510
This Mytrip deal was found by Cheapflights users on 1/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/512:10 pmIAH - LIS
1 stop13h 45mAir Canada
Wed 2/186:10 amLIS - IAH
2 stops21h 34mAir Canada
Deal found 1/2$513
This Kiwi.com deal was found by Cheapflights users on 1/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/3111:55 amIAH - LIS
2 stops23h 45mBrussels Airlines
Sat 2/710:15 amLIS - IAH
1 stop14h 31mBrussels Airlines
Deal found 1/3$517
This Mytrip deal was found by Cheapflights users on 1/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/67:10 amIAH - LIS
1 stop20h 10mMultiple Airlines
Sat 2/145:00 amLIS - IAH
2 stops36h 09mMultiple Airlines
Deal found 1/2$524
This Kiwi.com deal was found by Cheapflights users on 1/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/16:55 pmIAH - LIS
1 stop14h 45mLufthansa
Sun 2/86:30 pmLIS - IAH
1 stop29h 45mLufthansa
Deal found 1/4$529
This United Airlines deal was found by Cheapflights users on 1/3. 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.
Tue 3/1012:10 pmIAH - LIS
1 stop16h 10mUnited Airlines
Wed 3/185:00 amLIS - IAH
1 stop19h 15mUnited Airlines
Deal found 1/3$533

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 January 5, 2026.

Round-trip from

$489
(KLM)

One-way from

$226
(Kiwi.com)

Popular in

June

Cheapest in

March

Average price

$740
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. 20% potential increase in price ($218 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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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 January 5, 2026.
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

Mon 4/20

3:50 pm-3:25 pm

1 stop17h 35m

Porto

Thu 4/23

5:00 am-1:15 pm

1 stop14h 15m

$489

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 4/20

4:59 pm-6:10 pm

2 stops19h 11m

Porto

Thu 4/23

5:00 am-1:15 pm

1 stop14h 15m

$499

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Wed 2/25

4:40 pm-10:15 am

1 stop11h 35m

Lisbon Humberto Delgado

Sun 3/1

5:00 am-6:15 pm

1 stop19h 15m

$534

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Wed 3/11

5:05 pm-11:20 am

1 stop13h 15m

Lisbon Humberto Delgado

Wed 3/18

11:25 am-2:30 pm

1 stop32h 05m

$537

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Sun 2/8

11:55 am-8:10 am

2 stops14h 15m

Lisbon Humberto Delgado

Fri 2/27

5:00 am-6:15 pm

1 stop19h 15m

$539

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Wed 4/22

3:20 pm-6:45 pm

1 stop21h 25m

Lisbon Humberto Delgado

Wed 5/6

11:55 am-1:15 pm

1 stop31h 20m

$541

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Wed 3/4

3:30 pm-6:30 pm

1 stop21h 00m

Lisbon Humberto Delgado

Sun 3/8

3:30 pm-2:30 pm

1 stop28h 00m

$542

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Wed 4/15

3:50 pm-2:55 pm

1 stop17h 05m

Lisbon Humberto Delgado

Fri 4/24

5:35 am-1:35 pm

1 stop14h 00m

$543

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Sat 1/31

4:05 pm-3:10 pm

1 stop17h 05m

Lisbon Humberto Delgado

Sat 2/7

5:30 am-1:55 pm

1 stop14h 25m

$543

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 2/23

1:25 pm-9:30 am

1 stop14h 05m

Porto

Wed 3/11

6:00 am-7:15 pm

1 stop18h 15m

$543

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/3

Showing 1-10 of 38 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 $509). Flying from Houston George Bush Intcntl Airport to Portugal in June is currently the most expensive (average of $889). 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 5, 2026.
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
8,017 reviews

Comfort

7.9

Food

7.2

Overall

7.9

Boarding

8.1

Entertainment

7.8

Crew

8.5

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
8,017 reviews
Delta
7.9
Good
8,017 reviews

Comfort

7.9

Food

7.2

Overall

7.9

Boarding

8.1

Entertainment

7.8

Crew

8.5

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
1,518 reviews
Delta
7.9
Good
8,017 reviews

Comfort

7.9

Food

7.2

Overall

7.9

Boarding

8.1

Entertainment

7.8

Crew

8.5

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
9,138 reviews
Delta
7.9
Good
8,017 reviews

Comfort

7.9

Food

7.2

Overall

7.9

Boarding

8.1

Entertainment

7.8

Crew

8.5

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
10,589 reviews
Delta
7.9
Good
8,017 reviews

Comfort

7.9

Food

7.2

Overall

7.9

Boarding

8.1

Entertainment

7.8

Crew

8.5

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
7,643 reviews
Delta
7.9
Good
8,017 reviews

Comfort

7.9

Food

7.2

Overall

7.9

Boarding

8.1

Entertainment

7.8

Crew

8.5

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?

    KLM, Delta, and United Airlines can get you from Houston George Bush Intcntl Airport to Portugal in just under 11h 35m. Your travel time can differ by up to 7h 36m. 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 $509). Flying from Houston George Bush Intcntl Airport to Portugal in June is currently the most expensive (average of $889). 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.

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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 January 5, 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$494Average$900FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$540Average$840FlexibilityNo cancel feeOn-time77%
DeltaCheapest$546Average$781FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$558Average$929FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$587Average$1,017FlexibilityNo cancel feeOn-time69%
Turkish AirlinesCheapest$621Average$726FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$646Average$952FlexibilityNo cancel feeOn-time67%
LufthansaCheapest$679Average$1,336FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$699Average$1,081FlexibilityNo cancel feeOn-time71%

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