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$260+ 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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — LIS
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
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 September 15, 2025.

Round-trip from

$615
(Mytrip)

One-way from

$260
(Trip.com)

Popular in

June

Cheapest in

February

Average price

$916
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. 20% potential increase in price ($214 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 September 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 September 15, 2025.

This Mytrip deal was found by Cheapflights users on 9/14. 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.
Tue 10/1410:00 amIAH - OPO
2 stops23h 00mMultiple Airlines
Tue 10/217:35 amOPO - IAH
2 stops20h 39mMultiple Airlines
Deal found 9/14$615
This United deal was found by Cheapflights users on 9/15. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/199:34 amIAH - OPO
1 stop17h 56mMultiple Airlines
Wed 11/264:15 pmOPO - IAH
1 stop28h 20mMultiple Airlines
Deal found 9/15$619
This British Airways deal was found by Cheapflights users on 9/15. 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.
Mon 10/274:50 pmIAH - FNC
1 stop16h 25mBritish Airways
Wed 11/123:55 pmFNC - IAH
1 stop28h 10mBritish Airways
Deal found 9/15$627
This Expedia deal was found by Cheapflights users on 9/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/3010:55 amIAH - OPO
2 stops15h 45mMultiple Airlines
Thu 11/68:20 amOPO - IAH
2 stops21h 12mMultiple Airlines
Deal found 9/15$628
This Finnair deal was found by Cheapflights users on 9/15. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/52:24 pmIAH - LIS
2 stops19h 01mFinnair
Mon 12/14:10 pmLIS - IAH
2 stops33h 12mFinnair
Deal found 9/15$633
This Delta deal was found by Cheapflights users on 9/14. 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.
Sun 11/307:01 amIAH - LIS
2 stops21h 34mDelta
Mon 12/812:20 pmLIS - IAH
1 stop31h 35mDelta
Deal found 9/14$634
This Expedia deal was found by Cheapflights users on 9/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/82:23 pmIAH - OPO
2 stops35h 17mIberia
Sun 11/168:20 amOPO - IAH
2 stops21h 12mIberia
Deal found 9/15$634
This Air France deal was found by Cheapflights users on 9/13. 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.
Mon 10/133:50 pmIAH - LIS
1 stop20h 00mAir France
Mon 10/206:50 pmLIS - IAH
1 stop24h 45mAir France
Deal found 9/13$636
This Mytrip deal was found by Cheapflights users on 9/13. 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 10/209:08 amIAH - LIS
3 stops18h 12mMultiple Airlines
Wed 11/512:15 pmLIS - IAH
3 stops29h 16mMultiple Airlines
Deal found 9/13$639
This Delta deal was found by Cheapflights users on 9/15. 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 10/213:10 pmIAH - LIS
2 stops17h 40mDelta
Thu 10/305:30 amLIS - IAH
1 stop14h 25mDelta
Deal found 9/15$640
This Air France deal was found by Cheapflights users on 9/14. 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 10/213:50 pmIAH - LIS
1 stop17h 00mAir France
Sun 11/25:30 amLIS - IAH
1 stop14h 25mAir France
Deal found 9/14$641
This KLM deal was found by Cheapflights users on 9/15. 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.
Mon 10/276:09 pmIAH - FNC
2 stops34h 26mKLM
Wed 11/1210:25 amFNC - IAH
1 stop33h 05mKLM
Deal found 9/15$641

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 September 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

HoustonFunchal

IAH - FNC

IAHFNC

Houston George Bush Intcntl

Mon 10/27

4:50 pm-2:15 pm

1 stop16h 25m

Funchal Madeira

Wed 11/12

3:55 pm-2:05 pm

1 stop28h 10m

$627

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Wed 11/5

2:24 pm-3:25 pm

2 stops19h 01m

Lisbon Humberto Delgado

Mon 12/1

4:10 pm-7:22 pm

2 stops33h 12m

$633

HoustonFunchal

IAH - FNC

IAHFNC

Houston George Bush Intcntl

Sun 2/8

3:50 pm-4:05 pm

1 stop18h 15m

Funchal Madeira

Tue 2/17

3:05 pm-11:26 pm

2 stops38h 21m

$635

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Thu 2/19

12:55 pm-8:55 am

1 stop14h 00m

Lisbon Humberto Delgado

Mon 3/2

12:20 pm-1:55 pm

1 stop31h 35m

$639

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Wed 10/15

12:55 pm-2:50 pm

2 stops19h 55m

Lisbon Humberto Delgado

Fri 10/24

5:40 am-1:35 pm

1 stop13h 55m

$640

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Sat 2/21

6:25 pm-10:15 am

1 stop33h 50m

Lisbon Humberto Delgado

Sat 2/28

12:20 pm-2:10 pm

1 stop31h 50m

$641

HoustonFunchal

IAH - FNC

IAHFNC

Houston George Bush Intcntl

Mon 10/27

6:09 pm-9:35 am

2 stops34h 26m

Funchal Madeira

Wed 11/12

10:25 am-1:30 pm

1 stop33h 05m

$641

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 11/19

2:38 pm-9:30 am

1 stop12h 52m

Porto

Wed 11/26

12:35 pm-12:29 am

2 stops17h 54m

$642

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Sat 11/29

9:50 pm-5:55 pm

1 stop14h 05m

Lisbon Humberto Delgado

Wed 12/10

3:55 pm-2:05 pm

1 stop28h 10m

$643

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Tue 10/21

11:49 am-9:00 am

2 stops15h 11m

Lisbon Humberto Delgado

Sun 11/2

5:30 am-2:55 pm

1 stop14h 25m

$645

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

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 $1,127). 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 September 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.

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 September 15, 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
7,954 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

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
7,954 reviews
Delta
8.0
Very good
7,954 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

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
7.4
Good
1,469 reviews
Delta
8.0
Very good
7,954 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

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
8,929 reviews
Delta
8.0
Very good
7,954 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

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 Canada
7.1
Good
10,000 reviews
Delta
8.0
Very good
7,954 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

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!
British Airways
6.7
Okay
7,361 reviews
Delta
8.0
Very good
7,954 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

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.

  • How long is the flight from Houston George Bush Intcntl Airport to Portugal?

    British Airways, Finnair, and Delta can get you from Houston George Bush Intcntl Airport to Portugal in just under 14h. Your travel time can differ by up to 5h 01m. 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 - Funchal Madeira and Houston George Bush Intcntl - Porto.

  • 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 $1,127). 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapest$549Average$835FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$563Average$957FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$576Average$1,150FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$578Average$931FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$585Average$866FlexibilityNo cancel feeOn-time70%
DeltaCheapest$620Average$830FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$629Average$952FlexibilityNo cancel feeOn-time75%
Turkish AirlinesCheapest$637Average$720FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$679Average$1,404FlexibilityNo cancel feeOn-time76%

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