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$208+ 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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — LIS
2월 19 — 2월 261
목 2/19
목 2/26
1 adult, Economy
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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 1월 20, 2026.

Round-trip from

$437
(United Airlines)

One-way from

$208
(American Airlines)

Popular in

June

Cheapest in

March

Average price

$736
From Houston George Bush Intcntl to Portugal
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One-way flight from Houston George Bush Intcntl to Portugal
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Highest demand for flights based on searches. 20% potential increase in price ($217 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($29 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 1월 20, 2026.

This Expedia deal was found by Cheapflights users on 1/17. 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.
월 4/133:30 pm
IAH
-
OPO
1 stop22h 20m
British Airways
수 4/2212:25 pm
OPO
-
IAH
2 stops17h 34m
British Airways
Deal found 1/17$448
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.
수 2/43:50 pm
IAH
-
OPO
1 stop18h 55m
British Airways
월 2/912:25 pm
OPO
-
IAH
2 stops31h 26m
British Airways
Deal found 1/19$452
This Finnair 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
수 2/411:18 am
IAH
-
OPO
2 stops14h 22m
Multiple Airlines
월 2/912:25 pm
OPO
-
IAH
2 stops36h 53m
Multiple Airlines
Deal found 1/19$461
This Mytrip deal was found by Cheapflights users on 1/18. 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.
일 3/225:30 pm
IAH
-
OPO
1 stop16h 45m
Multiple Airlines
화 3/318:40 am
OPO
-
IAH
2 stops18h 54m
Multiple Airlines
Deal found 1/18$463
This Kiwi.com deal was found by Cheapflights users on 1/18. 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.
화 3/105:30 pm
IAH
-
OPO
1 stop16h 15m
Lufthansa
월 3/164:15 pm
OPO
-
IAH
1 stop27h 55m
Lufthansa
Deal found 1/18$472
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.
일 3/18:30 am
IAH
-
OPO
2 stops19h 00m
United Airlines
화 3/1012:35 pm
OPO
-
IAH
1 stop16h 04m
United Airlines
Deal found 1/19$475
This Gotogate deal was found by Cheapflights users on 1/18. 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.
일 3/227:10 am
IAH
-
OPO
2 stops30h 20m
Air Canada
화 3/318:40 am
OPO
-
IAH
2 stops18h 54m
Air Canada
Deal found 1/18$485
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.
화 3/107:10 am
IAH
-
OPO
2 stops30h 20m
Multiple Airlines
월 3/164:15 pm
OPO
-
IAH
1 stop27h 55m
Multiple Airlines
Deal found 1/19$486
This Travelocity 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
수 2/43:50 pm
IAH
-
OPO
1 stop18h 55m
British Airways
일 2/88:20 am
OPO
-
IAH
2 stops22h 25m
British Airways
Deal found 1/19$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.
월 1/267:30 am
IAH
-
LIS
2 stops18h 40m
United Airlines
화 2/105:00 am
LIS
-
IAH
1 stop19h 15m
United Airlines
Deal found 1/19$499
This Kiwi.com deal was found by Cheapflights users on 1/18. 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.
수 3/115:30 pm
IAH
-
LIS
1 stop24h 20m
Lufthansa
월 3/1612:25 pm
LIS
-
IAH
1 stop31h 45m
Lufthansa
Deal found 1/18$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.
수 2/181:25 pm
IAH
-
LIS
1 stop12h 45m
United Airlines
수 2/255:00 am
LIS
-
IAH
1 stop19h 15m
United Airlines
Deal found 1/19$504

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 1월 20, 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

월 4/13

3:30 pm-7:50 pm

1 stop22h 20m

Porto

수 4/22

12:25 pm-11:59 pm

2 stops17h 34m

$448

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

수 2/4

3:50 pm-4:45 pm

1 stop18h 55m

Porto

월 2/9

12:25 pm-1:51 pm

2 stops31h 26m

$452

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

수 2/4

11:18 am-7:40 am

2 stops14h 22m

Porto

월 2/9

12:25 pm-7:18 pm

2 stops36h 53m

$461

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

일 3/1

8:30 am-9:30 am

2 stops19h 00m

Porto

화 3/10

12:35 pm-11:39 pm

1 stop16h 04m

$475

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

수 2/4

3:50 pm-4:45 pm

1 stop18h 55m

Porto

일 2/8

8:20 am-12:45 am

2 stops22h 25m

$498

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

수 2/25

1:25 pm-9:30 am

1 stop14h 05m

Porto

일 3/1

6:00 am-6:15 pm

1 stop18h 15m

$501

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

수 2/18

1:25 pm-8:10 am

1 stop12h 45m

Lisbon Humberto Delgado

수 2/25

5:00 am-6:15 pm

1 stop19h 15m

$504

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

월 4/20

4:30 pm-10:45 pm

1 stop24h 15m

Lisbon Humberto Delgado

수 4/29

5:05 am-6:00 pm

1 stop18h 55m

$507

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

일 3/22

5:30 pm-3:15 pm

1 stop16h 45m

Porto

화 3/31

4:35 pm-1:35 pm

1 stop27h 00m

$510

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

월 4/13

3:30 pm-11:10 pm

1 stop25h 40m

Lisbon Humberto Delgado

화 4/21

4:35 pm-7:18 pm

2 stops32h 43m

$510

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

Showing 1-10 of 47 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, March is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Portugal (average of $477). 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 1월 20, 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
8,080 reviews

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

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
8,080 reviews
Delta
7.9
Good
8,080 reviews

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

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
1,524 reviews
Delta
7.9
Good
8,080 reviews

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

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
9,184 reviews
Delta
7.9
Good
8,080 reviews

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

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
10,640 reviews
Delta
7.9
Good
8,080 reviews

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

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
8,080 reviews

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

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 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?

    British Airways, United Airlines, and KLM can get you from Houston George Bush Intcntl Airport to Portugal in just under 12h 45m. Your travel time can differ by up to 9h 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, March is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Portugal (average of $477). 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.

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 1월 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$494Average$938FlexibilityNo cancel feeOn-time75%
DeltaCheapest$546Average$773FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$570Average$840FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$581Average$1,010FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$588Average$946FlexibilityNo cancel feeOn-time70%
Turkish AirlinesCheapest$621Average$733FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$646Average$955FlexibilityNo cancel feeOn-time67%
LufthansaCheapest$679Average$1,336FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$699Average$1,005FlexibilityNo cancel feeOn-time71%

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