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$468+ Cheap flights from George Bush Intcntl (IAH) to Porto (OPO)

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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — OPO
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
1 adult, Economy
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Cheap flight deals from George Bush Intcntl to Porto

Discover tips and strategies to find the most affordable flight options for your journey from George Bush Intcntl (IAH) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 13, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$634
(Mytrip)

One-way from

$468
(United Airlines)

Popular in

June

Cheapest in

March

Average price

$771
Provider with most accurate pricing for Houston George Bush Intcntl-Porto flight deals.
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Provider most trusted by Cheapflights users for Houston George Bush Intcntl-Porto flights.
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From Houston George Bush Intcntl to Porto
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One-way flight from Houston George Bush Intcntl to Porto
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Highest demand for flights based on searches. 22% potential increase in price ($292 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($45 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from George Bush Intcntl to Porto

Cheapest flights from George Bush Intcntl to Porto
Explore the most affordable flight options available from George Bush Intcntl to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 13, 2025.

This Delta deal was found by Cheapflights users on 11/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/34:05 pmIAH - OPO
1 stop12h 25mDelta
Sun 12/75:00 amOPO - IAH
1 stop14h 30mDelta
Deal found 11/12$836
This Cheapflightsfares deal was found by Cheapflights users on 11/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/139:50 pmIAH - OPO
1 stop15h 25mBritish Airways
Sun 12/218:05 pmOPO - IAH
1 stop24h 00mBritish Airways
Deal found 11/13$854
This oojo deal was found by Cheapflights users on 11/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/62:55 pmIAH - OPO
1 stop18h 35mTurkish Airlines
Sat 12/134:10 pmOPO - IAH
1 stop33h 00mTurkish Airlines
Deal found 11/13$857
This Cheapflightsfares deal was found by Cheapflights users on 11/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/65:00 pmIAH - OPO
2 stops24h 40mLufthansa
Sat 12/136:00 amOPO - IAH
2 stops22h 47mLufthansa
Deal found 11/12$869
This Cheapflightsfares deal was found by Cheapflights users on 11/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/612:18 pmIAH - OPO
2 stops24h 17mSWISS
Sat 12/1311:55 amOPO - IAH
2 stops32h 45mSWISS
Deal found 11/13$884
This Air Canada deal was found by Cheapflights users on 11/11. 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.
Sat 12/612:10 pmIAH - OPO
2 stops18h 40mMultiple Airlines
Sat 12/136:00 amOPO - IAH
2 stops35h 09mMultiple Airlines
Deal found 11/11$890
This Air France deal was found by Cheapflights users on 11/12. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/64:05 pmIAH - OPO
1 stop12h 25mAir France
Sat 12/1311:25 amOPO - IAH
1 stop32h 30mAir France
Deal found 11/12$904

Cheapflights Fare Finder

 
Customize your flight search to find flights from George Bush Intcntl to Porto 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 November 13, 2025.
Use the filters below to find and compare flights from Houston George Bush Intcntl Airport to Porto that are best for you.

Fly from

George Bush Intcntl

Fly to

Porto

Route

Depart

Return

Price

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Thu 2/12

12:10 pm-10:15 am

2 stops16h 05m

Porto

Mon 2/16

7:45 pm-9:39 pm

3 stops31h 54m

$634

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 3/4

7:10 am-10:50 am

3 stops21h 40m

Porto

Wed 3/11

9:55 pm-9:39 pm

2 stops28h 44m

$636

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 2/18

9:05 pm-3:10 pm

1 stop36h 05m

Porto

Wed 2/25

4:10 pm-7:10 pm

1 stop33h 00m

$642

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 3/10

10:05 pm-9:55 am

1 stop30h 50m

Porto

Thu 3/26

4:10 pm-8:10 pm

1 stop33h 00m

$642

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 3/4

2:55 pm-3:10 pm

1 stop18h 15m

Porto

Wed 3/11

4:10 pm-8:10 pm

1 stop33h 00m

$642

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 3/4

4:50 pm-11:40 pm

1 stop24h 50m

Porto

Wed 3/11

6:00 am-11:59 pm

2 stops22h 59m

$669

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Thu 2/12

9:05 pm-9:55 am

1 stop30h 50m

Porto

Mon 2/16

10:55 am-7:10 pm

1 stop38h 15m

$669

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 3/10

11:55 am-2:45 pm

2 stops21h 50m

Porto

Thu 3/26

6:00 am-7:15 pm

1 stop18h 15m

$675

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 3/10

2:20 pm-9:30 am

2 stops14h 10m

Porto

Thu 3/26

6:00 am-7:15 pm

1 stop18h 15m

$677

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 3/3

1:25 pm-9:30 am

1 stop14h 05m

$468

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/12

Showing 1-10 of 14 results
1
2

Compare providers for flights from George Bush Intcntl to Porto

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from George Bush Intcntl to Porto in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Houston George Bush Intcntl Airport-Porto flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Houston George Bush Intcntl Airport-Porto flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Houston George Bush Intcntl Airport-Porto flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Houston George Bush Intcntl Airport-Porto flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Houston George Bush Intcntl Airport-Porto flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from George Bush Intcntl to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto 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 Porto

What is the cheapest time of day to fly from IAH to OPO?

Find hourly flight availability from George Bush Intcntl to Porto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 13, 2025.

A simple way to save on the total cost of your ticket is to fly from Houston George Bush Intcntl Airport to Porto in the afternoon. If you’re flexible enough to do this you can expect to save up to 23% on your trip compared to booking a flight at noon.

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. 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 Porto. Reviews last updated November 13, 2025.
Read reviews from past customers who have flown KLM, United Airlines, and Lufthansa from Houston George Bush Intcntl Airport to Porto. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,410 reviews

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,410 reviews
KLM
7.7
Good
1,410 reviews

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
United Airlines
7.4
Good
9,015 reviews
KLM
7.7
Good
1,410 reviews

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Lufthansa
6.8
Okay
7,570 reviews
KLM
7.7
Good
1,410 reviews

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

Related info for your journey

Find useful and relevant information for your journey from George Bush Intcntl to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Porto from Houston George Bush Intcntl?

    Most people fly into Porto (OPO) if they book a flight to Porto from Houston George Bush Intcntl. On average, Porto has 0 inbound flights from Houston George Bush Intcntl per day from 3 airlines. Porto is conveniently located just 6.8 mi from Porto’s city center.

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

    Departing from Houston George Bush Intcntl Airport to Porto will take you 36h 05m. There are 4726 mi between Houston George Bush Intcntl Airport and Porto.

  • What are the cheapest airlines flying from Houston George Bush Intcntl Airport to Porto round-trip?

    According to our current data, KLM ($536), United Airlines ($673), and Lufthansa ($679) offers the cheapest pricing from Houston George Bush Intcntl Airport to Porto. You may be able to fly from Houston George Bush Intcntl Airport to Porto for 46% less than the average price by searching for these airlines.

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

    To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at $468. SWISS flights start at $500 while deals on Brussels Airlines start at $501 one-way.

  • Can I find deals for flights from George Bush Intcntl to Porto that include hotel bookings?

    Yes. In addition to deals on George Bush Intcntl to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from George Bush Intcntl to Porto?

    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 Porto.

  • Can I find deals for business class flights from George Bush Intcntl to Porto?

    Yes. Cheapflights offers flight deals from George Bush Intcntl to Porto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Porto?

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Aveiro
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Coimbra
Vila Nova de Gaia

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Top 3 airlines flying from George Bush Intcntl to Porto

Discover the top 3 airlines that operate flights from George Bush Intcntl to Porto. 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 November 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$536Average$1,005FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$673Average$1,171FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$679Average$1,336FlexibilityNo cancel feeOn-time76%

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