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$226+ 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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — OPO
feb. 26 — mar. 51
jue. 2/26
jue. 3/5
1 adult, Economy
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Cheap 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 enero 27, 2026.

This Gotogate deal was found by Cheapflights users on 1/26. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/24:30 pm
IAH
-
OPO
1 stop16h 25m
Multiple Airlines
mié. 3/116:00 am
OPO
-
IAH
2 stops34h 09m
Multiple Airlines
Deal found 1/26$533
This Kiwi.com deal was found by Cheapflights users on 1/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/24:30 pm
IAH
-
OPO
1 stop13h 10m
Lufthansa
mié. 3/114:15 pm
OPO
-
IAH
1 stop27h 55m
Lufthansa
Deal found 1/26$542
This Gotogate deal was found by Cheapflights users on 1/26. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 2/2312:10 pm
IAH
-
OPO
2 stops17h 55m
Multiple Airlines
mié. 3/44:15 pm
OPO
-
IAH
1 stop27h 55m
Multiple Airlines
Deal found 1/26$546
This United Airlines deal was found by Cheapflights users on 1/26. 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.
lun. 2/231:25 pm
IAH
-
OPO
1 stop14h 05m
United Airlines
mié. 3/46:00 am
OPO
-
IAH
1 stop18h 15m
United Airlines
Deal found 1/26$548
This United Airlines deal was found by Cheapflights users on 1/25. 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.
lun. 2/232:35 pm
IAH
-
OPO
1 stop12h 55m
United Airlines
mié. 3/116:00 am
OPO
-
IAH
1 stop18h 15m
United Airlines
Deal found 1/25$550
This Delta deal was found by Cheapflights users on 1/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 2/249:54 am
IAH
-
OPO
2 stops18h 36m
Delta
mar. 3/35:00 am
OPO
-
IAH
1 stop14h 30m
Delta
Deal found 1/26$555
This KLM deal was found by Cheapflights users on 1/26. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/23:30 pm
IAH
-
OPO
1 stop21h 20m
KLM
mié. 3/115:00 am
OPO
-
IAH
1 stop14h 30m
KLM
Deal found 1/26$556
This Delta deal was found by Cheapflights users on 1/25. 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.
mar. 3/1011:39 am
IAH
-
OPO
2 stops17h 51m
Delta
jue. 3/265:00 am
OPO
-
IAH
1 stop14h 30m
Delta
Deal found 1/25$561
This Air France deal was found by Cheapflights users on 1/25. 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.
lun. 2/237:15 am
IAH
-
OPO
2 stops21h 15m
Multiple Airlines
mié. 3/115:00 am
OPO
-
IAH
2 stops21h 09m
Multiple Airlines
Deal found 1/25$562
This United Airlines deal was found by Cheapflights users on 1/26. 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. 2/242:35 pm
IAH
-
OPO
1 stop12h 55m
United Airlines
mar. 3/312:35 pm
OPO
-
IAH
1 stop14h 05m
United Airlines
Deal found 1/26$567

Find 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 enero 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$533
(Gotogate)

One-way from

$226
(Expedia)

Popular in

December

Cheapest in

March

Average price

$1,205
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
Search Deals
One-way flight from Houston George Bush Intcntl to Porto
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($213 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($88 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
Search Deals

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 enero 27, 2026.
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

lun. 3/2

4:30 pm-2:55 pm

1 stop16h 25m

Porto

mié. 3/11

6:00 am-11:09 am

2 stops34h 09m

$533

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

lun. 2/23

1:25 pm-9:30 am

1 stop14h 05m

Porto

mié. 3/4

6:00 am-6:15 pm

1 stop18h 15m

$548

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

lun. 2/23

2:35 pm-9:30 am

1 stop12h 55m

Porto

mié. 3/11

6:00 am-7:15 pm

1 stop18h 15m

$550

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

mar. 2/24

9:54 am-10:30 am

2 stops18h 36m

Porto

mar. 3/3

5:00 am-1:30 pm

1 stop14h 30m

$555

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

mar. 2/24

12:15 pm-10:30 am

2 stops16h 15m

Porto

mar. 3/3

4:10 pm-1:30 pm

1 stop27h 20m

$555

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

mar. 3/10

11:39 am-10:30 am

2 stops17h 51m

Porto

jue. 3/26

5:00 am-2:30 pm

1 stop14h 30m

$561

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

lun. 2/23

7:15 am-10:30 am

2 stops21h 15m

Porto

mié. 3/11

5:00 am-9:09 pm

2 stops21h 09m

$562

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

dom. 3/1

7:20 am-9:30 am

2 stops20h 10m

Porto

mar. 3/10

12:35 pm-12:30 am

2 stops16h 55m

$571

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

lun. 5/4

9:05 pm-7:50 pm

1 stop16h 45m

$226

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

mar. 5/19

9:05 pm-7:30 pm

1 stop16h 25m

$301

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 17 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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Houston George Bush Intcntl Airport-Porto flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.

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 enero 27, 2026.
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
1,443 reviews

Comfort

7.6

Boarding

7.8

Food

7.3

Entertainment

7.1

Crew

8.4

Overall

7.7

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
KLM
7.7
Good
1,443 reviews
KLM
7.7
Good
1,443 reviews

Comfort

7.6

Boarding

7.8

Food

7.3

Entertainment

7.1

Crew

8.4

Overall

7.7

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
United Airlines
7.4
Good
9,205 reviews
KLM
7.7
Good
1,443 reviews

Comfort

7.6

Boarding

7.8

Food

7.3

Entertainment

7.1

Crew

8.4

Overall

7.7

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Lufthansa
6.8
Okay
7,748 reviews
KLM
7.7
Good
1,443 reviews

Comfort

7.6

Boarding

7.8

Food

7.3

Entertainment

7.1

Crew

8.4

Overall

7.7

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.

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 05m. 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 ($476), United Airlines ($642), and Lufthansa ($831) 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 55% 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.

See more FAQs

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
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 enero 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$476Average$700FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$642Average$1,116FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$831Average$1,404FlexibilityNo cancel feeOn-time76%

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