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$268+ 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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — LIS
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$642
(Iberia)

One-way from

$268
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,153
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. 19% potential increase in price ($215 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Iberia deal was found by Cheapflights users on 6/12. 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.
Tue 11/1110:14 amIAH - FNC
2 stops21h 16mIberia
Wed 11/192:10 pmFNC - IAH
2 stops24h 16mIberia
Deal found 6/12$632
This Iberia deal was found by Cheapflights users on 6/11. 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.
Wed 10/296:21 pmIAH - OPO
2 stops16h 39mIberia
Mon 11/38:40 pmOPO - IAH
2 stops28h 46mIberia
Deal found 6/11$642
This United Airlines deal was found by Cheapflights users on 6/9. 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.
Sun 10/191:25 pmIAH - OPO
1 stop14h 20mUnited Airlines
Fri 10/3112:30 pmOPO - IAH
1 stop35h 45mUnited Airlines
Deal found 6/9$648
This KLM deal was found by Cheapflights users on 6/11. 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 10/294:30 pmIAH - OPO
1 stop13h 00mKLM
Mon 11/311:15 amOPO - IAH
1 stop32h 15mKLM
Deal found 6/11$650
This British Airways deal was found by Cheapflights users on 6/12. 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.
Tue 11/113:55 pmIAH - FNC
1 stop17h 10mBritish Airways
Tue 11/183:05 pmFNC - IAH
1 stop29h 05mBritish Airways
Deal found 6/12$654
This American Airlines deal was found by Cheapflights users on 6/11. 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 10/296:21 pmIAH - OPO
2 stops16h 39mAmerican Airlines
Mon 11/38:40 pmOPO - IAH
2 stops20h 38mAmerican Airlines
Deal found 6/11$657
This KLM deal was found by Cheapflights users on 6/12. 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.
Tue 11/113:30 pmIAH - FNC
1 stop36h 00mKLM
Mon 11/1710:25 amFNC - IAH
1 stop33h 05mKLM
Deal found 6/12$657
This Air France deal was found by Cheapflights users on 6/11. 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 10/281:15 pmIAH - OPO
2 stops16h 35mMultiple Airlines
Sun 11/24:10 pmOPO - IAH
1 stop27h 20mMultiple Airlines
Deal found 6/11$679
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/286:36 pmIAH - OPO
2 stops22h 49mLufthansa
Sun 11/25:15 amOPO - IAH
2 stops22h 42mLufthansa
Deal found 6/11$689
This KAYAK deal was found by Cheapflights users on 6/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/611:27 amIAH - OPO
2 stops14h 13mBritish Airways
Sun 11/98:20 amOPO - IAH
2 stops17h 45mBritish Airways
Deal found 6/10$757
This Air Canada deal was found by Cheapflights users on 6/11. 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 10/710:00 amIAH - OPO
2 stops19h 30mAir Canada
Thu 10/166:00 amOPO - IAH
2 stops22h 09mAir Canada
Deal found 6/11$760
This FlightHub deal was found by Cheapflights users on 6/10. 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 8/272:25 pmIAH - OPO
1 stop19h 25mTurkish Airlines
Thu 9/411:05 amOPO - IAH
1 stop38h 00mTurkish Airlines
Deal found 6/10$772

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 June 12, 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 10/29

6:21 pm-4:00 pm

2 stops16h 39m

Porto

Mon 11/3

8:40 pm-7:26 pm

2 stops28h 46m

$642

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 10/19

1:25 pm-9:45 am

1 stop14h 20m

Porto

Fri 10/31

12:30 pm-7:15 pm

1 stop35h 45m

$648

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 10/29

4:30 pm-10:30 am

1 stop13h 00m

Porto

Mon 11/3

11:15 am-1:30 pm

1 stop32h 15m

$650

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 10/29

6:21 pm-4:00 pm

2 stops16h 39m

Porto

Mon 11/3

8:40 pm-11:18 am

2 stops20h 38m

$657

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 10/28

1:15 pm-10:50 am

2 stops16h 35m

Porto

Sun 11/2

4:10 pm-1:30 pm

1 stop27h 20m

$679

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 10/28

6:36 pm-10:25 pm

2 stops22h 49m

Porto

Sun 11/2

5:15 am-10:57 pm

2 stops22h 42m

$689

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Thu 11/6

11:27 am-7:40 am

2 stops14h 13m

Porto

Sun 11/9

8:20 am-8:05 pm

2 stops17h 45m

$757

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 10/7

10:00 am-11:30 am

2 stops19h 30m

Porto

Thu 10/16

6:00 am-10:09 pm

2 stops22h 09m

$760

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 8/27

2:25 pm-3:50 pm

1 stop19h 25m

Porto

Thu 9/4

11:05 am-7:05 pm

1 stop38h 00m

$772

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 8/5

2:20 pm-3:30 pm

2 stops19h 10m

Porto

Thu 8/21

6:30 am-11:14 pm

2 stops22h 44m

$804

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 50 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 $1,136). 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 June 12, 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 June 12, 2025.
Read through reviews of airlines operating flights from Houston to Portugal, such as Delta, KLM and Austrian Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

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
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

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
1,358 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

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!
Austrian Airlines
7.6
Good
802 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

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!
Finnair
7.6
Good
1,290 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

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
1,463 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

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 Air Canada, 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 $1,136). 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$494Average$906FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$549Average$867FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$563Average$965FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$578Average$936FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$585Average$863FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$589Average$1,175FlexibilityNo cancel feeOn-time69%
KLMCheapest$629Average$964FlexibilityNo cancel feeOn-time75%
Turkish AirlinesCheapest$655Average$702FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$679Average$1,404FlexibilityNo cancel feeOn-time76%

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