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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
nov. 27 — dic. 41
jue. 11/27
jue. 12/4
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 octubre 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$526
(Air France)

One-way from

$468
(United Airlines)

Popular in

December

Cheapest in

March

Average price

$755
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. 13% potential increase in price ($160 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($76 potential savings vs. average RT price).
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Average for round-trip flights in October 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 octubre 28, 2025.

This Air France deal was found by Cheapflights users on 10/26. 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.
sáb. 11/294:05 pmIAH - OPO
1 stop12h 25mMultiple Airlines
mié. 12/104:10 pmOPO - IAH
1 stop27h 20mMultiple Airlines
Deal found 10/26$526
This KLM deal was found by Cheapflights users on 10/28. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/294:05 pmIAH - OPO
1 stop12h 25mKLM
mié. 12/106:00 amOPO - IAH
2 stops21h 11mKLM
Deal found 10/28$536
This Orbitz deal was found by Cheapflights users on 10/27. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/211:55 amIAH - OPO
2 stops41h 20mMultiple Airlines
mar. 12/97:25 pmOPO - IAH
2 stops32h 14mMultiple Airlines
Deal found 10/27$537
This United Airlines deal was found by Cheapflights users on 10/26. 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.
mar. 12/3012:10 pmIAH - OPO
2 stops17h 30mUnited Airlines
vie. 1/96:00 amOPO - IAH
2 stops24h 12mUnited Airlines
Deal found 10/26$548
This American Airlines deal was found by Cheapflights users on 10/26. 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.
sáb. 11/2910:43 amIAH - OPO
2 stops14h 57mAmerican Airlines
mié. 12/108:20 amOPO - IAH
2 stops17h 36mAmerican Airlines
Deal found 10/26$558
This Mytrip deal was found by Cheapflights users on 10/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/117:10 amIAH - OPO
3 stops28h 55mMultiple Airlines
jue. 12/187:25 amOPO - IAH
2 stops20h 14mMultiple Airlines
Deal found 10/27$637
This oojo deal was found by Cheapflights users on 10/27. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/119:05 pmIAH - OPO
1 stop30h 50mTurkish Airlines
mié. 11/1910:55 amOPO - IAH
1 stop38h 15mTurkish Airlines
Deal found 10/27$643
This Mytrip deal was found by Cheapflights users on 10/26. 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.
mié. 11/1212:30 pmIAH - OPO
2 stops28h 00mMultiple Airlines
jue. 11/204:45 pmOPO - IAH
3 stops34h 54mMultiple Airlines
Deal found 10/26$664
This KLM deal was found by Cheapflights users on 10/27. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/113:30 pmIAH - OPO
1 stop15h 50mKLM
jue. 12/1811:20 amOPO - IAH
2 stops17h 03mKLM
Deal found 10/27$677

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 octubre 28, 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

mar. 12/2

4:05 pm-10:30 am

1 stop12h 25m

Porto

mar. 12/9

11:15 am-1:30 pm

1 stop32h 15m

$526

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

sáb. 11/29

4:05 pm-10:30 am

1 stop12h 25m

Porto

mié. 12/10

4:10 pm-1:30 pm

1 stop27h 20m

$526

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

mar. 12/2

4:05 pm-10:30 am

1 stop12h 25m

Porto

mar. 12/9

6:05 am-5:44 pm

2 stops17h 39m

$536

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

sáb. 11/29

4:05 pm-10:30 am

1 stop12h 25m

Porto

mié. 12/10

6:00 am-9:11 pm

2 stops21h 11m

$536

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

mar. 12/30

12:10 pm-11:40 am

2 stops17h 30m

Porto

vie. 1/9

6:00 am-12:12 am

2 stops24h 12m

$548

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

jue. 2/26

3:30 pm-3:25 pm

1 stop17h 55m

Porto

mar. 3/3

11:15 am-1:30 pm

1 stop32h 15m

$557

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

mar. 3/10

2:20 pm-9:30 am

2 stops14h 10m

Porto

mié. 3/18

6:00 am-7:15 pm

1 stop18h 15m

$570

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

mar. 3/10

4:30 pm-9:30 am

1 stop12h 00m

Porto

mar. 3/17

6:00 am-7:15 pm

1 stop18h 15m

$570

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

lun. 3/9

4:30 pm-9:30 am

1 stop12h 00m

Porto

mar. 3/17

6:00 am-7:15 pm

1 stop18h 15m

$570

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

mié. 3/11

4:30 pm-9:30 am

1 stop12h 00m

Porto

mié. 3/18

6:00 am-7:15 pm

1 stop18h 15m

$570

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

Showing 1-10 of 16 results
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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 October.
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 month to book a flight from Houston George Bush Intcntl Airport to Porto?

Currently, November is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Porto (average of $614). Flying from Houston George Bush Intcntl Airport to Porto in June is currently the most expensive (average of $1,273). 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 octubre 28, 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 octubre 28, 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
1,406 reviews

Boarding

7.8

Overall

7.7

Comfort

7.7

Food

7.3

Entertainment

7.1

Crew

8.4

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
1,406 reviews
KLM
7.7
Good
1,406 reviews

Boarding

7.8

Overall

7.7

Comfort

7.7

Food

7.3

Entertainment

7.1

Crew

8.4

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
9,000 reviews
KLM
7.7
Good
1,406 reviews

Boarding

7.8

Overall

7.7

Comfort

7.7

Food

7.3

Entertainment

7.1

Crew

8.4

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
7,533 reviews
KLM
7.7
Good
1,406 reviews

Boarding

7.8

Overall

7.7

Comfort

7.7

Food

7.3

Entertainment

7.1

Crew

8.4

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 12h 25m. There are 4726 mi between Houston George Bush Intcntl Airport and Porto. This flight may include one or multiple stops.

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

    According to our current data, KLM ($629), 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 40% less than the average price by searching for these airlines.

  • 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, November is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Porto (average of $614). Flying from Houston George Bush Intcntl Airport to Porto in June is currently the most expensive (average of $1,273). 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
Arcos de Valdevez
Coimbra

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Alternative routes for George Bush Intcntl to Porto

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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 octubre 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$629Average$1,075FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$673Average$1,174FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$679Average$1,336FlexibilityNo cancel feeOn-time76%

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