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$276+ 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 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — OPO
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 September 11, 2025.

Round-trip from

$570
(American Airlines)

One-way from

$276
(Kiwi.com)

Popular in

June

Cheapest in

March

Average price

$951
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. 18% potential increase in price ($231 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($37 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 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 September 11, 2025.

This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/209:47 amIAH - OPO
2 stops15h 48mAmerican Airlines
Wed 11/58:20 amOPO - IAH
2 stops17h 31mAmerican Airlines
Deal found 9/10$570
This United Airlines deal was found by Cheapflights users on 9/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/201:29 pmIAH - OPO
1 stop14h 16mUnited Airlines
Wed 11/512:35 pmOPO - IAH
2 stops26h 15mUnited Airlines
Deal found 9/10$605
This lol.travel deal was found by Cheapflights users on 9/10. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/108:30 pmIAH - OPO
1 stop31h 00mUnited Airlines
Sun 11/236:00 amOPO - IAH
2 stops24h 29mUnited Airlines
Deal found 9/10$608
This United deal was found by Cheapflights users on 9/10. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/209:45 amIAH - OPO
2 stops18h 00mMultiple Airlines
Wed 11/54:15 pmOPO - IAH
1 stop28h 20mMultiple Airlines
Deal found 9/10$616
This Iberia deal was found by Cheapflights users on 9/10. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/207:22 pmIAH - OPO
2 stops14h 33mIberia
Wed 11/58:40 pmOPO - IAH
2 stops26h 47mIberia
Deal found 9/10$619
This American Airlines deal was found by Cheapflights users on 9/11. 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.
Mon 11/101:17 pmIAH - OPO
2 stops16h 28mAmerican Airlines
Sun 11/238:20 amOPO - IAH
2 stops21h 07mAmerican Airlines
Deal found 9/11$628
This United Airlines deal was found by Cheapflights users on 9/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/119:49 amIAH - OPO
2 stops17h 41mUnited Airlines
Mon 11/1712:30 pmOPO - IAH
2 stops38h 20mUnited Airlines
Deal found 9/10$634
This Mytrip deal was found by Cheapflights users on 9/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/316:43 pmIAH - OPO
3 stops21h 42mMultiple Airlines
Wed 11/58:05 pmOPO - IAH
3 stops31h 48mMultiple Airlines
Deal found 9/11$658

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 September 11, 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

Mon 10/20

1:29 pm-9:45 am

1 stop14h 16m

Porto

Wed 11/5

12:35 pm-8:50 am

2 stops26h 15m

$605

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 10/20

9:45 am-9:45 am

2 stops18h 00m

Porto

Wed 11/5

4:15 pm-2:35 pm

1 stop28h 20m

$616

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 10/20

7:22 pm-3:55 pm

2 stops14h 33m

Porto

Wed 11/5

8:40 pm-5:27 pm

2 stops26h 47m

$619

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 11/11

2:38 pm-9:30 am

1 stop12h 52m

Porto

Mon 11/17

12:30 pm-2:35 pm

1 stop32h 05m

$619

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 2/10

4:30 pm-2:45 pm

1 stop16h 15m

Porto

Thu 2/26

6:00 am-6:15 pm

1 stop18h 15m

$623

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 2/10

12:05 pm-2:45 pm

2 stops20h 40m

Porto

Fri 2/27

6:00 am-6:15 pm

1 stop18h 15m

$627

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 2/10

6:55 pm-2:45 pm

1 stop13h 50m

Porto

Tue 2/24

12:35 pm-10:30 pm

1 stop15h 55m

$636

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 2/10

11:50 am-2:45 pm

2 stops20h 55m

Porto

Tue 2/24

12:35 pm-10:30 pm

1 stop15h 55m

$636

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 2/11

10:31 am-3:25 pm

2 stops22h 54m

Porto

Thu 2/26

6:00 am-12:12 am

2 stops24h 12m

$637

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 10/12

6:43 pm-3:05 pm

3 stops38h 22m

$276

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 14 results
1
2

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 $1,027). 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 September 11, 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 September 11, 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
7.8
Good
1,385 reviews

Overall

7.8

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Entertainment

7.2

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
KLM
7.8
Good
1,385 reviews
KLM
7.8
Good
1,385 reviews

Overall

7.8

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Entertainment

7.2

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
United Airlines
7.4
Good
8,937 reviews
KLM
7.8
Good
1,385 reviews

Overall

7.8

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Entertainment

7.2

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
Lufthansa
6.8
Okay
7,409 reviews
KLM
7.8
Good
1,385 reviews

Overall

7.8

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Entertainment

7.2

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

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 14h 16m. 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 37% 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, 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 $1,027). 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

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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$629Average$1,005FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$673Average$1,174FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$679Average$1,404FlexibilityNo cancel feeOn-time76%

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