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$336+ 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 5/13. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — LIS
Apr 20 — Apr 271
Sun 4/20
Sun 4/27
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 April 15, 2025.

Round-trip from

$679
(United Airlines)

One-way from

$336
(Kiwi.com)

Popular in

May

Cheapest in

February

Average price

$820
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. 10% potential increase in price ($106 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 15, 2025.

This Air Canada deal was found by Cheapflights users on 4/15. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/299:30 amIAH - LIS
1 stop17h 50mAir Canada
Sat 12/611:00 amLIS - IAH
1 stop17h 33mAir Canada
Deal found 4/15$679
This United Airlines deal was found by Cheapflights users on 4/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/52:38 pmIAH - OPO
1 stop13h 07mUnited Airlines
Thu 8/2112:10 pmOPO - IAH
2 stops31h 30mUnited Airlines
Deal found 4/14$679
This Delta deal was found by Cheapflights users on 4/14. 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 10/151:15 pmIAH - LIS
2 stops19h 20mDelta
Sun 11/212:20 pmLIS - IAH
1 stop31h 35mDelta
Deal found 4/14$682
This Lufthansa deal was found by Cheapflights users on 4/15. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/286:20 pmIAH - LIS
2 stops22h 30mLufthansa
Thu 12/113:55 pmLIS - IAH
1 stop28h 45mLufthansa
Deal found 4/15$684
This Mytrip deal was found by Cheapflights users on 4/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/710:00 amIAH - LIS
2 stops26h 40mMultiple Airlines
Thu 5/157:05 amLIS - IAH
2 stops18h 51mMultiple Airlines
Deal found 4/14$687
This British Airways deal was found by Cheapflights users on 4/15. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/299:45 pmIAH - LIS
1 stop14h 10mBritish Airways
Mon 12/86:35 pmLIS - IAH
1 stop25h 35mBritish Airways
Deal found 4/15$688
This United Airlines deal was found by Cheapflights users on 4/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/148:15 amIAH - LIS
2 stops19h 05mUnited Airlines
Tue 10/2811:00 amLIS - IAH
1 stop16h 33mUnited Airlines
Deal found 4/14$694
This United deal was found by Cheapflights users on 4/14. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/59:32 pmIAH - OPO
2 stops29h 48mMultiple Airlines
Thu 8/2112:10 pmOPO - IAH
2 stops15h 57mMultiple Airlines
Deal found 4/14$698
This Air Canada deal was found by Cheapflights users on 4/15. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/56:15 pmIAH - OPO
2 stops33h 05mAir Canada
Thu 8/2112:10 pmOPO - IAH
2 stops26h 39mAir Canada
Deal found 4/15$700
This KLM deal was found by Cheapflights users on 4/15. 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 4/303:50 pmIAH - OPO
1 stop17h 40mKLM
Mon 5/125:30 pmOPO - IAH
1 stop25h 45mKLM
Deal found 4/15$714
This Delta deal was found by Cheapflights users on 4/14. 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.
Tue 10/73:50 pmIAH - OPO
1 stop17h 40mDelta
Thu 10/166:30 amOPO - IAH
2 stops23h 26mDelta
Deal found 4/14$725
This FlightHub deal was found by Cheapflights users on 4/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/122:25 pmIAH - LIS
1 stop37h 30mTurkish Airlines
Wed 5/2110:55 amLIS - IAH
1 stop38h 10mTurkish Airlines
Deal found 4/14$733

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 April 15, 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

Tue 8/5

2:38 pm-9:45 am

1 stop13h 07m

Porto

Thu 8/21

12:10 pm-1:40 pm

2 stops31h 30m

$679

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Wed 5/7

10:00 am-6:40 pm

2 stops26h 40m

Lisbon Humberto Delgado

Thu 5/15

7:05 am-7:56 pm

2 stops18h 51m

$687

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Sun 10/12

6:16 pm-9:20 am

2 stops33h 04m

Lisbon Humberto Delgado

Tue 10/28

11:00 am-10:33 pm

1 stop16h 33m

$696

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 8/5

9:32 pm-9:20 am

2 stops29h 48m

Porto

Thu 8/21

12:10 pm-10:07 pm

2 stops15h 57m

$698

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 8/5

6:15 pm-9:20 am

2 stops33h 05m

Porto

Thu 8/21

12:10 pm-8:49 am

2 stops26h 39m

$700

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 4/30

3:50 pm-3:30 pm

1 stop17h 40m

Porto

Mon 5/12

5:30 pm-1:15 pm

1 stop25h 45m

$714

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Sun 10/12

6:15 am-10:45 am

2 stops22h 30m

Lisbon Humberto Delgado

Mon 11/3

12:20 pm-1:55 pm

1 stop31h 35m

$722

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 10/7

3:50 pm-3:30 pm

1 stop17h 40m

Porto

Thu 10/16

6:30 am-11:56 pm

2 stops23h 26m

$725

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Sun 10/12

7:50 pm-10:30 am

1 stop32h 40m

Lisbon Humberto Delgado

Sat 11/1

11:55 am-12:26 am

1 stop17h 31m

$726

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Mon 5/12

2:25 pm-9:55 am

1 stop37h 30m

Lisbon Humberto Delgado

Wed 5/21

10:55 am-7:05 pm

1 stop38h 10m

$733

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/14

Showing 1-10 of 43 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, January is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Portugal (average of $612). Flying from Houston George Bush Intcntl Airport to Portugal in June is currently the most expensive (average of $1,203). 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 April 15, 2025.

When flying from Houston George Bush Intcntl Airport to Portugal, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Portugal by month

Plan your trip to Portugal by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Portugal ranges from 0.2 - 4.8 inches per month. December is typically the wettest month, when rainfall can reach 4.8 in. July is typically the driest time to visit Portugal when rainfall is around 0.2 in.

Temperature in Portugal by month

Plan your trip to Portugal by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Portugal, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

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 April 15, 2025.
Read through reviews of airlines operating flights from Houston to Portugal, such as Delta, KLM and Finnair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,918 reviews

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,918 reviews
Delta
8.0
Very good
7,918 reviews

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,323 reviews
Delta
8.0
Very good
7,918 reviews

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,269 reviews
Delta
8.0
Very good
7,918 reviews

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air France
7.5
Good
1,435 reviews
Delta
8.0
Very good
7,918 reviews

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,578 reviews
Delta
8.0
Very good
7,918 reviews

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • What are the cheapest airlines to fly from Houston George Bush Intcntl Airport to Portugal one-way?

    The cheapest airline one-way is Aer Lingus, with whom users have recently found tickets for as low as $562. However, be on the lookout for offers from British Airways and Iberia, 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, January is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Portugal (average of $612). Flying from Houston George Bush Intcntl Airport to Portugal in June is currently the most expensive (average of $1,203). 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 April 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$494Average$984FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$549Average$925FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$563Average$984FlexibilityNo cancel feeOn-time67%
British AirwaysCheapest$586Average$870FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$592Average$1,182FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$595Average$1,089FlexibilityNo cancel feeOn-time71%
KLMCheapest$635Average$968FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$646Average$1,529FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$655Average$696FlexibilityNo cancel feeOn-time77%

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