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$302+ 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 11/8. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — LIS
Nov 15 — Nov 221
Sat 11/15
Sat 11/22
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 October 16, 2025.

Round-trip from

$501
(Mytrip)

One-way from

$302
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$792
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. 18% potential increase in price ($197 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 October 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 October 16, 2025.

This Mytrip deal was found by Cheapflights users on 10/15. 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.
Mon 11/247:10 amIAH - OPO
2 stops23h 40mAir Canada
Sun 12/76:15 amOPO - IAH
2 stops21h 29mAir Canada
Deal found 10/15$501
This Mytrip deal was found by Cheapflights users on 10/15. 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.
Mon 11/247:10 amIAH - OPO
2 stops23h 40mMultiple Airlines
Sun 12/712:30 pmOPO - IAH
1 stop32h 05mMultiple Airlines
Deal found 10/15$524
This Air France deal was found by Cheapflights users on 10/15. 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.
Wed 11/124:05 pmIAH - OPO
1 stop12h 25mMultiple Airlines
Wed 11/194:10 pmOPO - IAH
1 stop27h 20mMultiple Airlines
Deal found 10/15$526
This Delta deal was found by Cheapflights users on 10/16. 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.
Fri 11/144:05 pmIAH - OPO
1 stop12h 25mDelta
Thu 11/2711:15 amOPO - IAH
1 stop32h 15mDelta
Deal found 10/16$529
This United Airlines deal was found by Cheapflights users on 10/15. 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.
Fri 11/1412:10 pmIAH - OPO
2 stops15h 20mUnited Airlines
Thu 11/2712:35 pmOPO - IAH
2 stops31h 01mUnited Airlines
Deal found 10/15$535
This Delta deal was found by Cheapflights users on 10/15. 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.
Tue 11/114:05 pmIAH - OPO
1 stop12h 25mDelta
Wed 11/196:00 amOPO - IAH
2 stops22h 24mDelta
Deal found 10/15$536
This Delta deal was found by Cheapflights users on 10/16. 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.
Wed 11/1211:05 amIAH - OPO
2 stops17h 25mDelta
Wed 11/196:00 amOPO - IAH
2 stops22h 24mDelta
Deal found 10/16$541
This Delta deal was found by Cheapflights users on 10/14. 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.
Wed 11/124:05 pmIAH - OPO
1 stop12h 25mDelta
Sun 11/1611:25 amOPO - IAH
1 stop32h 30mDelta
Deal found 10/14$545
This KLM deal was found by Cheapflights users on 10/15. 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.
Wed 11/193:30 pmIAH - OPO
1 stop13h 00mKLM
Sun 11/235:00 amOPO - IAH
1 stop14h 30mKLM
Deal found 10/15$557
This KLM deal was found by Cheapflights users on 10/15. 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.
Thu 12/1112:42 pmIAH - LIS
1 stop14h 13mMultiple Airlines
Fri 12/265:30 amLIS - IAH
1 stop14h 25mMultiple Airlines
Deal found 10/15$596
This Air France deal was found by Cheapflights users on 10/15. 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.
Wed 10/2212:37 pmIAH - LIS
1 stop13h 23mKLM
Wed 10/2911:25 amLIS - IAH
1 stop32h 05mKLM
Deal found 10/15$600
This Air France deal was found by Cheapflights users on 10/14. 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 10/2112:37 pmIAH - LIS
1 stop13h 23mAir France
Tue 10/286:30 pmLIS - IAH
1 stop25h 25mAir France
Deal found 10/14$606

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 October 16, 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

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 11/24

7:10 am-12:50 pm

2 stops23h 40m

Porto

Sun 12/7

6:15 am-9:44 pm

2 stops21h 29m

$501

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 11/24

7:10 am-12:50 pm

2 stops23h 40m

Porto

Sun 12/7

12:30 pm-2:35 pm

1 stop32h 05m

$524

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 11/24

4:05 pm-10:30 am

1 stop12h 25m

Porto

Sun 12/7

5:00 am-1:30 pm

1 stop14h 30m

$526

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 12/3

4:05 pm-10:30 am

1 stop12h 25m

Porto

Tue 12/9

11:15 am-1:30 pm

1 stop32h 15m

$526

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 11/26

4:05 pm-10:30 am

1 stop12h 25m

Porto

Wed 12/3

11:15 am-1:30 pm

1 stop32h 15m

$526

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Fri 11/14

4:05 pm-10:30 am

1 stop12h 25m

Porto

Thu 11/27

11:15 am-1:30 pm

1 stop32h 15m

$529

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 11/12

1:36 pm-10:30 am

2 stops14h 54m

Porto

Wed 11/19

11:15 am-1:30 pm

1 stop32h 15m

$530

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 2/8

3:30 pm-10:30 am

1 stop13h 00m

Porto

Sun 2/15

5:00 am-1:30 pm

1 stop14h 30m

$532

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 2/8

11:50 am-12:05 pm

2 stops18h 15m

Porto

Sun 2/15

6:00 am-11:09 am

2 stops35h 09m

$533

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Fri 11/14

7:34 am-9:30 am

1 stop19h 56m

Porto

Thu 11/27

12:35 pm-11:15 am

1 stop28h 40m

$535

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/15

Showing 1-10 of 37 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 $514). Flying from Houston George Bush Intcntl Airport to Portugal in June is currently the most expensive (average of $873). 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 October 16, 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 October 16, 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
8.0
Very good
7,979 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
8.0
Very good
7,979 reviews
Delta
8.0
Very good
7,979 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Air France
7.4
Good
1,475 reviews
Delta
8.0
Very good
7,979 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,979 reviews
Delta
8.0
Very good
7,979 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Air Canada
7.1
Good
10,304 reviews
Delta
8.0
Very good
7,979 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
British Airways
6.7
Okay
7,456 reviews
Delta
8.0
Very good
7,979 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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?

    Air Canada, Delta, and KLM can get you from Houston George Bush Intcntl Airport to Portugal in just under 12h 25m. Your travel time can differ by up to 11h 15m. Houston George Bush Intcntl Airport and Portugal are separated by a distance of 4726 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 Air France, with whom users have recently found tickets for as low as $467. However, be on the lookout for offers from KLM 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 $514). Flying from Houston George Bush Intcntl Airport to Portugal in June is currently the most expensive (average of $873). 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 October 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapest$549Average$840FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$563Average$957FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$572Average$1,150FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$578Average$931FlexibilityNo cancel feeOn-time71%
KLMCheapest$595Average$977FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$601Average$883FlexibilityNo cancel feeOn-time70%
Turkish AirlinesCheapest$628Average$720FlexibilityNo cancel feeOn-time77%
DeltaCheapest$643Average$800FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$679Average$1,404FlexibilityNo cancel feeOn-time76%

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