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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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — LIS
feb. 26 — mar. 51
jue. 2/26
jue. 3/5
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 enero 27, 2026.

This Flighttix deal was found by Cheapflights users on 1/27. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 2/264:50 pm
IAH
-
LIS
1 stop14h 30m
Lufthansa
mié. 3/115:00 am
LIS
-
IAH
1 stop19h 15m
Lufthansa
Deal found 1/27$529
This Kiwi.com deal was found by Cheapflights users on 1/26. 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.
lun. 3/95:30 pm
IAH
-
LIS
1 stop24h 20m
Lufthansa
lun. 3/1612:25 pm
LIS
-
IAH
1 stop31h 45m
Lufthansa
Deal found 1/26$530
This Gotogate deal was found by Cheapflights users on 1/26. 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.
lun. 3/24:30 pm
IAH
-
OPO
1 stop16h 25m
Multiple Airlines
mié. 3/116:00 am
OPO
-
IAH
2 stops34h 09m
Multiple Airlines
Deal found 1/26$533
This United Airlines deal was found by Cheapflights users on 1/26. 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.
mié. 2/251:25 pm
IAH
-
LIS
1 stop12h 45m
United Airlines
dom. 3/15:00 am
LIS
-
IAH
1 stop19h 15m
United Airlines
Deal found 1/26$534
This United Airlines deal was found by Cheapflights users on 1/25. 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.
dom. 2/226:30 am
IAH
-
LIS
1 stop19h 40m
United Airlines
sáb. 3/75:00 am
LIS
-
IAH
1 stop19h 15m
United Airlines
Deal found 1/25$535
This Delta deal was found by Cheapflights users on 1/25. 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.
sáb. 4/1812:38 pm
IAH
-
LIS
1 stop13h 22m
Delta
dom. 4/265:00 am
LIS
-
IAH
1 stop14h 15m
Delta
Deal found 1/25$536
This KLM deal was found by Cheapflights users on 1/26. 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.
lun. 2/2312:42 pm
IAH
-
LIS
2 stops13h 18m
KLM
mié. 3/113:30 pm
LIS
-
IAH
1 stop28h 00m
KLM
Deal found 1/26$538
This United Airlines deal was found by Cheapflights users on 1/25. 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. 4/218:23 am
IAH
-
LIS
2 stops17h 57m
United Airlines
mar. 4/285:05 am
LIS
-
IAH
1 stop18h 55m
United Airlines
Deal found 1/25$539
This Delta deal was found by Cheapflights users on 1/25. 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.
dom. 4/195:20 am
IAH
-
LIS
2 stops20h 40m
Delta
vie. 5/111:55 am
LIS
-
IAH
1 stop31h 20m
Delta
Deal found 1/25$541
This KLM deal was found by Cheapflights users on 1/24. 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.
mié. 3/114:30 pm
IAH
-
LIS
1 stop21h 00m
KLM
mié. 3/183:30 pm
LIS
-
IAH
1 stop28h 00m
KLM
Deal found 1/24$542
This Kiwi.com deal was found by Cheapflights users on 1/26. 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.
lun. 3/24:30 pm
IAH
-
OPO
1 stop13h 10m
Lufthansa
mié. 3/114:15 pm
OPO
-
IAH
1 stop27h 55m
Lufthansa
Deal found 1/26$542
This Finnair deal was found by Cheapflights users on 1/25. 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.
mié. 4/153:30 pm
IAH
-
LIS
1 stop25h 45m
Multiple Airlines
mar. 4/214:35 pm
LIS
-
IAH
2 stops32h 43m
Multiple Airlines
Deal found 1/25$543

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 enero 27, 2026.

Round-trip from

$527
(Kiwi.com)

One-way from

$226
(Expedia)

Popular in

June

Cheapest in

March

Average price

$736
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 ($222 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 enero 27, 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

lun. 3/2

4:30 pm-2:55 pm

1 stop16h 25m

Porto

mié. 3/11

6:00 am-11:09 am

2 stops34h 09m

$533

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

mar. 4/21

1:38 pm-8:20 am

1 stop12h 42m

Lisbon Humberto Delgado

mar. 4/28

5:05 am-6:00 pm

1 stop18h 55m

$534

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

mié. 2/25

1:25 pm-8:10 am

1 stop12h 45m

Lisbon Humberto Delgado

dom. 3/1

5:00 am-6:15 pm

1 stop19h 15m

$534

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

mar. 2/24

11:55 am-8:10 am

2 stops14h 15m

Lisbon Humberto Delgado

mar. 3/3

5:00 am-6:15 pm

1 stop19h 15m

$539

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

dom. 4/19

5:20 am-8:00 am

2 stops20h 40m

Lisbon Humberto Delgado

vie. 5/1

11:55 am-1:15 pm

1 stop31h 20m

$541

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

mié. 3/11

4:30 pm-6:30 pm

1 stop21h 00m

Lisbon Humberto Delgado

mié. 3/18

3:30 pm-2:30 pm

1 stop28h 00m

$542

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

lun. 2/23

12:42 pm-8:00 am

2 stops13h 18m

Lisbon Humberto Delgado

mié. 3/11

5:00 am-5:49 pm

2 stops17h 49m

$544

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

mar. 4/21

2:43 pm-8:20 am

1 stop11h 37m

Lisbon Humberto Delgado

vie. 5/1

5:05 am-12:40 am

2 stops25h 35m

$544

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

mié. 4/22

2:43 pm-8:20 am

1 stop11h 37m

Lisbon Humberto Delgado

vie. 5/1

7:25 am-11:11 pm

2 stops21h 46m

$544

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

lun. 2/23

1:25 pm-9:30 am

1 stop14h 05m

Porto

mié. 3/4

6:00 am-6:15 pm

1 stop18h 15m

$548

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 44 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 enero 27, 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
8,124 reviews

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Overall

7.9

Crew

8.5

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
8,124 reviews
Delta
7.9
Good
8,124 reviews

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Overall

7.9

Crew

8.5

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
1,528 reviews
Delta
7.9
Good
8,124 reviews

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Overall

7.9

Crew

8.5

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
9,209 reviews
Delta
7.9
Good
8,124 reviews

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Overall

7.9

Crew

8.5

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
10,666 reviews
Delta
7.9
Good
8,124 reviews

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Overall

7.9

Crew

8.5

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
7,704 reviews
Delta
7.9
Good
8,124 reviews

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Overall

7.9

Crew

8.5

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?

    United Airlines, Delta, and British Airways can get you from Houston George Bush Intcntl Airport to Portugal in just under 12h 42m. Your travel time can differ by up to 7h 58m. 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 enero 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$476Average$910FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$540Average$840FlexibilityNo cancel feeOn-time77%
DeltaCheapest$546Average$773FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$581Average$1,009FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$588Average$973FlexibilityNo cancel feeOn-time70%
Turkish AirlinesCheapest$621Average$726FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$693Average$954FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$699Average$1,005FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$831Average$1,404FlexibilityNo cancel feeOn-time76%

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