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$247+ 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 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — LIS
dic. 13 — dic. 201
sáb. 12/13
sáb. 12/20
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 noviembre 13, 2025.

Round-trip from

$526
(United Airlines)

One-way from

$247
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$814
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. 19% potential increase in price ($204 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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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 noviembre 13, 2025.

This United Airlines deal was found by Cheapflights users on 11/11. 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.
jue. 12/1112:10 pmIAH - LIS
1 stop15h 10mUnited Airlines
jue. 12/1810:55 amLIS - IAH
2 stops40h 33mUnited Airlines
Deal found 11/11$527
This Delta deal was found by Cheapflights users on 11/13. 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.
mar. 12/309:54 amIAH - LIS
2 stops16h 06mDelta
lun. 1/1211:25 amLIS - IAH
1 stop32h 05mDelta
Deal found 11/13$539
This Expedia deal was found by Cheapflights users on 11/11. 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.
jue. 12/1112:10 pmIAH - LIS
1 stop15h 10mAir Canada
jue. 12/1810:55 amLIS - IAH
1 stop16h 44mAir Canada
Deal found 11/11$540
This United Airlines deal was found by Cheapflights users on 11/12. 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.
mar. 12/212:10 pmIAH - LIS
1 stop15h 10mUnited Airlines
jue. 12/115:00 amLIS - IAH
1 stop19h 15mUnited Airlines
Deal found 11/12$546
This United Airlines deal was found by Cheapflights users on 11/13. 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.
lun. 12/17:50 pmIAH - LIS
2 stops31h 30mUnited Airlines
mar. 12/911:20 amLIS - IAH
2 stops37h 35mUnited Airlines
Deal found 11/13$552
This Air France deal was found by Cheapflights users on 11/12. 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.
mar. 12/24:05 pmIAH - LIS
1 stop13h 15mMultiple Airlines
lun. 1/193:30 pmLIS - IAH
1 stop28h 00mMultiple Airlines
Deal found 11/12$554
This Finnair deal was found by Cheapflights users on 11/12. 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.
vie. 12/128:10 amIAH - LIS
1 stop18h 40mMultiple Airlines
vie. 12/1911:05 amLIS - IAH
1 stop17h 51mMultiple Airlines
Deal found 11/12$555
This KLM deal was found by Cheapflights users on 11/12. 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.
jue. 11/273:30 pmIAH - FNC
1 stop19h 40mKLM
vie. 12/126:00 pmFNC - IAH
1 stop25h 30mKLM
Deal found 11/12$661
This KLM deal was found by Cheapflights users on 11/11. 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.
sáb. 12/63:30 pmIAH - FNC
1 stop36h 05mKLM
lun. 12/1510:25 amFNC - IAH
1 stop33h 05mKLM
Deal found 11/11$700
This Gotogate deal was found by Cheapflights users on 11/12. 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.
jue. 11/276:30 amIAH - FNC
2 stops47h 15mBritish Airways
vie. 12/1212:10 pmFNC - IAH
2 stops41h 25mBritish Airways
Deal found 11/12$785
This Delta deal was found by Cheapflights users on 11/12. 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.
mié. 12/34:05 pmIAH - OPO
1 stop12h 25mDelta
dom. 12/75:00 amOPO - IAH
1 stop14h 30mDelta
Deal found 11/12$836
This Mytrip deal was found by Cheapflights users on 11/12. 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.
jue. 11/2712:10 pmIAH - FNC
3 stops28h 45mMultiple Airlines
vie. 12/121:00 pmFNC - IAH
2 stops24h 04mMultiple Airlines
Deal found 11/12$845

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 noviembre 13, 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

mar. 1/13

12:10 pm-9:20 am

1 stop15h 10m

Lisbon Humberto Delgado

mié. 1/21

5:00 am-6:15 pm

1 stop19h 15m

$526

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

mié. 2/18

8:17 pm-7:55 am

2 stops29h 38m

Lisbon Humberto Delgado

lun. 2/23

6:10 am-4:10 pm

1 stop16h 00m

$533

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

mar. 12/30

3:30 pm-10:35 am

1 stop13h 05m

Lisbon Humberto Delgado

lun. 1/12

3:30 pm-1:30 pm

1 stop28h 00m

$539

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

jue. 1/22

7:05 am-8:00 am

2 stops18h 55m

Lisbon Humberto Delgado

vie. 2/6

11:25 am-1:30 pm

1 stop32h 05m

$539

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

sáb. 1/24

7:05 am-8:00 am

2 stops18h 55m

Lisbon Humberto Delgado

jue. 2/12

11:25 am-1:30 pm

1 stop32h 05m

$539

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

mar. 12/2

12:10 pm-9:20 am

1 stop15h 10m

Lisbon Humberto Delgado

jue. 12/11

5:00 am-6:15 pm

1 stop19h 15m

$546

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

mar. 12/2

12:10 pm-9:20 am

1 stop15h 10m

Lisbon Humberto Delgado

jue. 1/15

5:00 am-6:15 pm

1 stop19h 15m

$546

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

jue. 1/15

5:00 am-9:20 am

2 stops22h 20m

Lisbon Humberto Delgado

lun. 1/19

11:20 am-4:24 pm

2 stops35h 04m

$551

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

lun. 12/1

7:50 pm-9:20 am

2 stops31h 30m

Lisbon Humberto Delgado

mar. 12/9

11:20 am-6:55 pm

2 stops37h 35m

$552

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

jue. 2/12

12:10 pm-10:15 am

2 stops16h 05m

Porto

lun. 2/16

7:45 pm-9:39 pm

3 stops31h 54m

$634

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/11

Showing 1-10 of 34 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 noviembre 13, 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 noviembre 13, 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
8,008 reviews

Comfort

7.9

Overall

7.9

Crew

8.5

Boarding

8.1

Food

7.3

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
8,008 reviews
Delta
7.9
Good
8,008 reviews

Comfort

7.9

Overall

7.9

Crew

8.5

Boarding

8.1

Food

7.3

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
1,487 reviews
Delta
7.9
Good
8,008 reviews

Comfort

7.9

Overall

7.9

Crew

8.5

Boarding

8.1

Food

7.3

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
9,017 reviews
Delta
7.9
Good
8,008 reviews

Comfort

7.9

Overall

7.9

Crew

8.5

Boarding

8.1

Food

7.3

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
10,445 reviews
Delta
7.9
Good
8,008 reviews

Comfort

7.9

Overall

7.9

Crew

8.5

Boarding

8.1

Food

7.3

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
7,517 reviews
Delta
7.9
Good
8,008 reviews

Comfort

7.9

Overall

7.9

Crew

8.5

Boarding

8.1

Food

7.3

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, KLM, and Delta can get you from Houston George Bush Intcntl Airport to Portugal in just under 13h 05m. Your travel time can differ by up to 5h 50m. 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 cheapest airlines to fly from Houston George Bush Intcntl Airport to Portugal one-way?

    The cheapest airline one-way is United Airlines, with whom users have recently found tickets for as low as $468. However, be on the lookout for offers from SWISS and Brussels Airlines, 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, 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.

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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 noviembre 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$536Average$952FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$549Average$840FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$563Average$958FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$570Average$1,039FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$578Average$936FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$601Average$888FlexibilityNo cancel feeOn-time70%
Turkish AirlinesCheapest$628Average$720FlexibilityNo cancel feeOn-time77%
DeltaCheapest$643Average$815FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$679Average$1,336FlexibilityNo cancel feeOn-time76%

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