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$238+ 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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — OPO
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
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 July 29, 2025.

Round-trip from

$590
(Gotogate)

One-way from

$238
(Mytrip)

Popular in

June

Cheapest in

March

Average price

$1,150
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. 20% potential increase in price ($255 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($36 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 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 July 29, 2025.

This Gotogate deal was found by Cheapflights users on 7/28. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2210:00 amIAH - OPO
2 stops19h 25mMultiple Airlines
Wed 11/512:30 pmOPO - IAH
1 stop32h 05mMultiple Airlines
Deal found 7/28$590
This United Airlines deal was found by Cheapflights users on 7/28. 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.
Wed 11/192:38 pmIAH - OPO
1 stop12h 52mUnited Airlines
Sun 11/236:00 amOPO - IAH
2 stops22h 31mUnited Airlines
Deal found 7/28$640
This British Airways deal was found by Cheapflights users on 7/28. 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.
Wed 10/229:00 pmIAH - OPO
1 stop31h 25mBritish Airways
Wed 11/56:30 pmOPO - IAH
1 stop31h 30mBritish Airways
Deal found 7/28$646
This FlightHub deal was found by Cheapflights users on 7/27. 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 10/229:00 pmIAH - OPO
1 stop30h 45mTurkish Airlines
Fri 10/314:10 pmOPO - IAH
1 stop27h 00mTurkish Airlines
Deal found 7/27$656
This Iberia deal was found by Cheapflights users on 7/27. 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 10/216:23 pmIAH - OPO
2 stops15h 32mIberia
Sat 11/18:40 pmOPO - IAH
2 stops33h 50mIberia
Deal found 7/27$659
This Lufthansa deal was found by Cheapflights users on 7/27. 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.
Tue 10/216:50 pmIAH - OPO
2 stops22h 00mLufthansa
Fri 10/3112:30 pmOPO - IAH
2 stops35h 13mLufthansa
Deal found 7/27$704
This Air Canada deal was found by Cheapflights users on 7/27. 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.
Thu 10/2310:00 amIAH - OPO
2 stops19h 25mAir Canada
Thu 10/306:00 amOPO - IAH
2 stops32h 11mAir Canada
Deal found 7/27$732

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 July 29, 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

Wed 10/22

10:00 am-11:25 am

2 stops19h 25m

Porto

Wed 11/5

12:30 pm-2:35 pm

1 stop32h 05m

$590

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 11/19

2:38 pm-9:30 am

1 stop12h 52m

Porto

Sun 11/23

6:00 am-10:31 pm

2 stops22h 31m

$640

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 10/22

9:00 pm-10:25 am

1 stop31h 25m

Porto

Wed 11/5

6:30 pm-8:00 pm

1 stop31h 30m

$646

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 10/22

9:00 pm-9:45 am

1 stop30h 45m

Porto

Fri 10/31

4:10 pm-2:10 pm

1 stop27h 00m

$656

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 10/21

6:23 pm-3:55 pm

2 stops15h 32m

Porto

Sat 11/1

8:40 pm-1:30 am

2 stops33h 50m

$659

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 10/21

6:50 pm-10:50 pm

2 stops22h 00m

Porto

Thu 10/30

6:00 am-11:59 pm

2 stops22h 59m

$697

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Thu 10/23

10:00 am-11:25 am

2 stops19h 25m

Porto

Thu 10/30

6:00 am-9:11 am

2 stops32h 11m

$732

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 9/22

7:35 am-9:45 pm

2 stops32h 10m

$238

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Fri 10/24

11:14 am-9:45 am

2 stops16h 31m

$518

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Fri 10/24

4:47 pm-3:55 pm

2 stops17h 08m

$532

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 11 results
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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 month to book a flight from Houston George Bush Intcntl Airport to Porto?

Currently, January is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Porto (average of $523). Flying from Houston George Bush Intcntl Airport to Porto in June is currently the most expensive (average of $1,033). 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 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 July 29, 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 24% 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 July 29, 2025.
Read reviews from past customers who have flown KLM, United Airlines, and Turkish Airlines 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
7.8
Good
1,383 reviews

Overall

7.8

Food

7.3

Crew

8.4

Boarding

7.8

Entertainment

7.1

Comfort

7.7

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
KLM
7.8
Good
1,383 reviews
KLM
7.8
Good
1,383 reviews

Overall

7.8

Food

7.3

Crew

8.4

Boarding

7.8

Entertainment

7.1

Comfort

7.7

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
United Airlines
7.4
Good
8,896 reviews
KLM
7.8
Good
1,383 reviews

Overall

7.8

Food

7.3

Crew

8.4

Boarding

7.8

Entertainment

7.1

Comfort

7.7

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Turkish Airlines
7.3
Good
3,925 reviews
KLM
7.8
Good
1,383 reviews

Overall

7.8

Food

7.3

Crew

8.4

Boarding

7.8

Entertainment

7.1

Comfort

7.7

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
American Airlines
7.2
Good
10,000 reviews
KLM
7.8
Good
1,383 reviews

Overall

7.8

Food

7.3

Crew

8.4

Boarding

7.8

Entertainment

7.1

Comfort

7.7

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Air Canada
7.1
Good
9,826 reviews
KLM
7.8
Good
1,383 reviews

Overall

7.8

Food

7.3

Crew

8.4

Boarding

7.8

Entertainment

7.1

Comfort

7.7

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

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.

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

    According to our current data, United Airlines ($640), British Airways ($646), and Turkish Airlines ($656) 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 36% 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 $518. American Airlines flights start at $532 while deals on KLM start at $598 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.

  • What is the cheapest month to book a flight from Houston George Bush Intcntl Airport to Porto?

    Currently, January is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Porto (average of $523). Flying from Houston George Bush Intcntl Airport to Porto in June is currently the most expensive (average of $1,033). 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

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Aveiro
Coimbra
Matosinhos

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Alternative routes for George Bush Intcntl to Porto

See prices for flight routes from nearby airports that may be better suited for you.
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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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$629Average$944FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$673Average$1,174FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$679Average$1,404FlexibilityNo cancel feeOn-time76%

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