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$261+ 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 10/20. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — LIS
Jul 6 — Jul 131
Sun 7/6
Sun 7/13
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 July 1, 2025.

Round-trip from

$618
(Iberia)

One-way from

$261
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$944
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 ($200 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 1, 2025.

This Iberia deal was found by Cheapflights users on 6/30. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/13:55 pmIAH - OPO
2 stops22h 05mIberia
Mon 12/1512:25 pmOPO - IAH
2 stops37h 40mIberia
Deal found 6/30$618
This United Airlines deal was found by Cheapflights users on 6/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/16:55 pmIAH - OPO
1 stop14h 00mUnited Airlines
Mon 12/1512:30 pmOPO - IAH
1 stop32h 05mUnited Airlines
Deal found 6/30$621
This Gurufare deal was found by Cheapflights users on 6/30. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/16:36 pmIAH - OPO
2 stops21h 49mLufthansa
Mon 12/154:15 pmOPO - IAH
1 stop28h 20mLufthansa
Deal found 6/30$643
This Air Canada deal was found by Cheapflights users on 6/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1211:50 amIAH - OPO
2 stops18h 15mAir Canada
Sun 11/166:00 amOPO - IAH
2 stops34h 59mAir Canada
Deal found 6/29$660
This Kiwi.com deal was found by Cheapflights users on 6/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/312:57 pmIAH - OPO
1 stop15h 33mMultiple Airlines
Thu 9/251:50 pmOPO - IAH
2 stops27h 52mMultiple Airlines
Deal found 6/30$668
This Delta deal was found by Cheapflights users on 6/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/126:00 amIAH - OPO
2 stops22h 50mDelta
Sun 11/1611:45 amOPO - IAH
1 stop32h 10mDelta
Deal found 6/30$680
This Air France deal was found by Cheapflights users on 6/29. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/121:15 pmIAH - OPO
2 stops15h 35mAir France
Sun 11/1611:45 amOPO - IAH
1 stop32h 10mAir France
Deal found 6/29$732
This American Airlines deal was found by Cheapflights users on 6/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/57:21 pmIAH - OPO
2 stops18h 34mAmerican Airlines
Thu 8/2112:20 pmOPO - IAH
2 stops17h 34mAmerican Airlines
Deal found 6/30$768
This FlightHub deal was found by Cheapflights users on 7/1. 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.
Wed 7/302:25 pmIAH - OPO
1 stop19h 25mTurkish Airlines
Fri 8/294:50 pmOPO - IAH
1 stop32h 15mTurkish Airlines
Deal found 7/1$772
This Travelocity deal was found by Cheapflights users on 7/1. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/254:30 pmIAH - LIS
1 stop16h 00mLufthansa
Sun 11/303:55 pmLIS - IAH
2 stops31h 07mLufthansa
Deal found 7/1$780
This United Airlines deal was found by Cheapflights users on 6/29. 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.
Fri 8/86:32 pmIAH - LIS
2 stops56h 48mUnited Airlines
Mon 8/1812:15 pmLIS - IAH
1 stop35h 35mUnited Airlines
Deal found 6/29$781
This American Airlines deal was found by Cheapflights users on 6/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/136:50 pmIAH - LIS
2 stops15h 15mAmerican Airlines
Wed 8/2011:05 amLIS - IAH
2 stops17h 48mAmerican Airlines
Deal found 6/30$783

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 July 1, 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

Wed 9/3

12:57 pm-10:30 am

1 stop15h 33m

Porto

Thu 9/25

1:50 pm-11:42 am

2 stops27h 52m

$668

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 8/18

10:00 am-9:35 am

1 stop17h 35m

Porto

Wed 8/27

6:00 am-5:50 pm

1 stop17h 50m

$735

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 8/4

10:00 am-9:35 am

1 stop17h 35m

Porto

Thu 8/21

12:10 pm-7:36 pm

1 stop13h 26m

$738

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 8/5

7:21 pm-7:55 pm

2 stops18h 34m

Porto

Thu 8/21

12:20 pm-11:54 pm

2 stops17h 34m

$768

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 7/30

2:25 pm-3:50 pm

1 stop19h 25m

Porto

Fri 8/29

4:50 pm-7:05 pm

1 stop32h 15m

$772

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 8/3

7:21 pm-3:55 pm

2 stops14h 34m

Porto

Wed 8/20

8:35 pm-8:10 pm

2 stops29h 35m

$779

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Tue 11/25

4:30 pm-2:30 pm

1 stop16h 00m

Lisbon Humberto Delgado

Sun 11/30

3:55 pm-5:02 pm

2 stops31h 07m

$780

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Fri 8/8

6:32 pm-9:20 am

2 stops56h 48m

Lisbon Humberto Delgado

Mon 8/18

12:15 pm-5:50 pm

1 stop35h 35m

$781

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 8/17

3:35 pm-11:15 am

1 stop13h 40m

Porto

Mon 8/25

12:10 pm-1:35 pm

1 stop31h 25m

$781

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 8/5

3:50 pm-3:30 pm

1 stop17h 40m

Porto

Thu 8/21

9:20 am-11:56 pm

2 stops20h 36m

$782

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/29

Showing 1-10 of 41 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 $1,130). 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 July 1, 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.

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 July 1, 2025.
Read through reviews of airlines operating flights from Houston George Bush Intcntl Airport to Portugal, such as Delta, KLM, and Air France. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,973 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,973 reviews
Delta
8.0
Very good
7,973 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,366 reviews
Delta
8.0
Very good
7,973 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,472 reviews
Delta
8.0
Very good
7,973 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,858 reviews
Delta
8.0
Very good
7,973 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Turkish Airlines
7.3
Good
3,886 reviews
Delta
8.0
Very good
7,973 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 British Airways, with whom users have recently found tickets for as low as $463. However, be on the lookout for offers from United Airlines and TAP AIR PORTUGAL, 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 $1,130). 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 July 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$494Average$889FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$549Average$849FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$563Average$962FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$578Average$936FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$585Average$861FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$588Average$1,172FlexibilityNo cancel feeOn-time69%
KLMCheapest$629Average$943FlexibilityNo cancel feeOn-time75%
Turkish AirlinesCheapest$655Average$743FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$679Average$1,404FlexibilityNo cancel feeOn-time76%

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