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$280+ 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 2/7. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — LIS
Dec 30 — Jan 61
Tue 12/30
Tue 1/6
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 November 30, 2025.

Round-trip from

$501
(United Airlines)

One-way from

$280
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$839
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 ($211 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($28 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 November 30, 2025.

This Air Canada deal was found by Cheapflights users on 11/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/912:10 pmIAH - LIS
1 stop15h 10mAir Canada
Mon 12/156:10 amLIS - IAH
2 stops21h 34mAir Canada
Deal found 11/28$555
This United Airlines deal was found by Cheapflights users on 11/28. 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 12/71:34 pmIAH - LIS
1 stop12h 36mUnited Airlines
Sun 12/145:00 amLIS - IAH
2 stops22h 44mUnited Airlines
Deal found 11/28$557
This Air France deal was found by Cheapflights users on 11/28. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/94:05 pmIAH - LIS
1 stop19h 25mAir France
Mon 12/155:30 amLIS - IAH
1 stop14h 25mAir France
Deal found 11/28$560
This KLM deal was found by Cheapflights users on 11/29. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/64:28 pmIAH - FNC
2 stops35h 07mKLM
Mon 12/1510:25 amFNC - IAH
1 stop33h 05mKLM
Deal found 11/29$565
This United Airlines deal was found by Cheapflights users on 11/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1112:10 pmIAH - LIS
1 stop15h 10mUnited Airlines
Tue 12/1611:20 amLIS - IAH
3 stops18h 37mUnited Airlines
Deal found 11/29$570
This Air Canada deal was found by Cheapflights users on 11/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/712:10 pmIAH - LIS
2 stops39h 10mAir Canada
Sun 12/1410:50 amLIS - IAH
2 stops40h 49mAir Canada
Deal found 11/28$573
This Mytrip deal was found by Cheapflights users on 11/30. 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.
Sat 12/134:32 pmIAH - LIS
2 stops23h 58mBritish Airways
Mon 1/126:35 pmLIS - IAH
1 stop25h 30mBritish Airways
Deal found 11/30$651
This Cheapflightsfares deal was found by Cheapflights users on 11/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/611:57 amIAH - OPO
2 stops18h 53mLufthansa
Sat 12/136:15 amOPO - IAH
1 stop16h 15mLufthansa
Deal found 11/28$664
This Air France deal was found by Cheapflights users on 11/27. 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.
Sat 12/64:05 pmIAH - OPO
1 stop12h 25mMultiple Airlines
Sat 12/134:10 pmOPO - IAH
1 stop27h 20mMultiple Airlines
Deal found 11/27$676
This Booking.com deal was found by Cheapflights users on 11/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/138:10 amIAH - LIS
2 stops43h 40mBritish Airways
Mon 12/226:35 pmLIS - IAH
1 stop25h 30mBritish Airways
Deal found 11/28$685
This Cheapflightsfares deal was found by Cheapflights users on 11/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/612:18 pmIAH - OPO
2 stops24h 17mSWISS
Sat 12/1311:55 amOPO - IAH
2 stops32h 45mSWISS
Deal found 11/29$687
This Air France deal was found by Cheapflights users on 11/28. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/64:05 pmIAH - OPO
1 stop12h 25mAir France
Sat 12/1311:25 amOPO - IAH
1 stop32h 30mAir France
Deal found 11/28$695

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 November 30, 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

2:30 pm-8:10 am

1 stop11h 40m

Lisbon Humberto Delgado

Wed 1/21

5:00 am-6:15 pm

1 stop19h 15m

$501

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Fri 1/23

2:30 pm-8:10 am

1 stop11h 40m

Lisbon Humberto Delgado

Tue 1/27

5:00 am-6:15 pm

1 stop19h 15m

$516

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Wed 2/25

11:55 am-8:10 am

1 stop14h 15m

Lisbon Humberto Delgado

Sun 3/1

5:00 am-6:15 pm

1 stop19h 15m

$516

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Thu 1/8

7:10 am-9:20 am

2 stops20h 10m

Lisbon Humberto Delgado

Thu 1/22

12:35 pm-9:39 pm

2 stops39h 04m

$521

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Sun 1/11

12:00 pm-8:10 am

2 stops14h 10m

Lisbon Humberto Delgado

Sun 1/18

5:00 am-7:57 pm

2 stops20h 57m

$530

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Fri 1/23

9:54 am-8:00 am

2 stops16h 06m

Lisbon Humberto Delgado

Tue 1/27

5:00 am-6:46 pm

2 stops19h 46m

$534

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 3/10

2:45 pm-9:30 am

1 stop13h 45m

Porto

Thu 3/26

6:00 am-7:15 pm

1 stop18h 15m

$573

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 3/10

11:39 am-10:30 am

2 stops17h 51m

Porto

Thu 3/26

11:15 am-8:42 am

2 stops26h 27m

$591

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Thu 1/29

3:30 pm-3:25 pm

1 stop17h 55m

Porto

Mon 2/2

11:15 am-1:30 pm

1 stop32h 15m

$632

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Fri 1/30

4:30 pm-10:25 pm

1 stop23h 55m

Porto

Tue 2/3

6:00 am-6:15 pm

1 stop18h 15m

$637

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/28

Showing 1-10 of 27 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 November 30, 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 November 30, 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

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

7.9

Boarding

8.1

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

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

7.9

Boarding

8.1

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

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

7.9

Boarding

8.1

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
9,056 reviews
Delta
7.9
Good
8,010 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

7.9

Boarding

8.1

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
10,485 reviews
Delta
7.9
Good
8,010 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

7.9

Boarding

8.1

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
7,545 reviews
Delta
7.9
Good
8,010 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

7.9

Boarding

8.1

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, Delta, and KLM can get you from Houston George Bush Intcntl Airport to Portugal in just under 11h 40m. Your travel time can differ by up to 8h. 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 Lufthansa, with whom users have recently found tickets for as low as $405. However, be on the lookout for offers from British Airways and United 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 November 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$536Average$832FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$549Average$839FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$562Average$948FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$571Average$1,016FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$601Average$902FlexibilityNo cancel feeOn-time70%
Turkish AirlinesCheapest$621Average$720FlexibilityNo cancel feeOn-time77%
DeltaCheapest$643Average$822FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$679Average$1,336FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$699Average$1,005FlexibilityNo cancel feeOn-time71%

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