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$627+ Cheap flights from Houston to Porto (OPO)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — OPO
feb. 25 — mar. 41
mar. 2/25
mar. 3/4
1 adult, Economy
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Cheap flight deals from Houston to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Houston (HO1) 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 febrero 20, 2025.

Round-trip from

$627
(United)

Popular in

December

Cheapest in

March
From Houston to Porto
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($46 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($60 potential savings vs. average RT price).
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Find flight deals from Houston to Porto

Cheapest flights from Houston to Porto
Explore the most affordable flight options available from Houston to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on febrero 20, 2025.

This KLM deal was found by Cheapflights users on 2/18. 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.
mar. 3/184:25 pmIAH - OPO
1 stop13h 20mKLM
jue. 3/276:15 amOPO - IAH
1 stop37h 20mKLM
Deal found 2/18$631
This United Airlines deal was found by Cheapflights users on 2/19. 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. 4/19:30 amIAH - OPO
2 stops18h 15mUnited Airlines
mar. 4/86:00 amOPO - IAH
2 stops20h 50mUnited Airlines
Deal found 2/19$641
This Delta deal was found by Cheapflights users on 2/19. 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. 3/182:35 pmHOU - OPO
2 stops19h 50mDelta
mar. 3/2511:15 amOPO - HOU
2 stops27h 21mDelta
Deal found 2/19$646
This Gotogate deal was found by Cheapflights users on 2/19. 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.
mar. 3/258:45 amIAH - OPO
2 stops21h 30mMultiple Airlines
dom. 3/306:45 pmOPO - IAH
2 stops33h 16mMultiple Airlines
Deal found 2/19$680
This Delta deal was found by Cheapflights users on 2/19. 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.
jue. 3/204:25 pmIAH - OPO
1 stop13h 05mDelta
jue. 3/2711:15 amOPO - IAH
2 stops26h 30mDelta
Deal found 2/19$691
This Kiwi.com deal was found by Cheapflights users on 2/19. 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.
jue. 3/205:30 pmIAH - OPO
1 stop23h 55mLufthansa
jue. 3/274:20 pmOPO - IAH
1 stop28h 20mLufthansa
Deal found 2/19$723
This oojo deal was found by Cheapflights users on 2/19. 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.
mié. 4/309:00 pmIAH - OPO
1 stop30h 50mTurkish Airlines
mar. 5/1310:50 amOPO - IAH
1 stop31h 50mTurkish Airlines
Deal found 2/19$761
This KLM deal was found by Cheapflights users on 2/19. 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.
mar. 3/186:45 pmHOU - OPO
2 stops15h 40mKLM
mié. 3/266:00 amOPO - HOU
2 stops22h 06mKLM
Deal found 2/19$856
This SWISS deal was found by Cheapflights users on 2/18. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 3/198:50 pmIAH - OPO
2 stops15h 40mSWISS
mar. 3/257:30 pmOPO - IAH
2 stops25h 10mSWISS
Deal found 2/18$860
This Aeromexico deal was found by Cheapflights users on 2/19. 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 Aeromexico is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 4/262:41 pmIAH - OPO
2 stops42h 49mAir France
vie. 5/99:20 amOPO - IAH
2 stops36h 44mAir France
Deal found 2/19$894
This Gurufare deal was found by Cheapflights users on 2/20. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/178:17 pmHOU - OPO
2 stops38h 43mBritish Airways
lun. 3/2412:25 pmOPO - HOU
2 stops40h 28mBritish Airways
Deal found 2/20$981
This Expedia deal was found by Cheapflights users on 2/18. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 5/96:23 pmIAH - OPO
2 stops19h 32mIberia
dom. 5/188:15 amOPO - IAH
2 stops21h 28mIberia
Deal found 2/18$1,073

Find flights from Houston to Porto within your budget

Customize your flight search to find flights from Houston 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 febrero 20, 2025.

Fly from

Houston

Fly to

Porto

Route

Depart

Return

Price

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

mar. 4/1

2:55 pm-9:45 am

1 stop12h 50m

Porto

mar. 4/8

6:00 am-6:00 pm

1 stop18h 00m

$627

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

mar. 3/18

4:25 pm-10:45 am

1 stop13h 20m

Porto

mié. 3/26

4:10 pm-2:35 pm

1 stop27h 25m

$631

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

mar. 3/18

2:35 pm-3:25 pm

2 stops19h 50m

Porto

mar. 3/25

11:15 am-9:36 am

2 stops27h 21m

$646

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

mar. 3/25

8:45 am-11:15 am

2 stops21h 30m

Porto

dom. 3/30

6:45 pm-10:01 pm

2 stops33h 16m

$680

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

jue. 3/20

4:25 pm-10:30 am

1 stop13h 05m

Porto

jue. 3/27

11:15 am-8:45 am

2 stops26h 30m

$691

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

jue. 3/20

5:30 pm-10:25 pm

1 stop23h 55m

Porto

jue. 3/27

4:20 pm-3:40 pm

1 stop28h 20m

$723

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

mié. 4/30

9:00 pm-9:50 am

1 stop30h 50m

Porto

mar. 5/13

10:50 am-12:40 pm

1 stop31h 50m

$761

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

mar. 3/18

6:45 pm-3:25 pm

2 stops15h 40m

Porto

mié. 3/26

6:00 am-11:06 pm

2 stops22h 06m

$856

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

mié. 3/19

8:50 pm-5:30 pm

2 stops15h 40m

Porto

mar. 3/25

7:30 pm-3:40 pm

2 stops25h 10m

$860

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

sáb. 4/26

2:41 pm-3:30 pm

2 stops42h 49m

Porto

vie. 5/9

9:20 am-4:04 pm

2 stops36h 44m

$894

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 18 results
1
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Best time to book a flight from Houston to Porto

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

Travel insights for flights from Houston to Porto

Get recent, data-driven insights about flights from Houston to Porto including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Houston to Porto?

Currently, January is the cheapest month in which you can book a flight from Houston to Porto (average of $523). Flying from Houston to Porto in June is currently the most expensive (average of $1,092). 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 HOU to OPO?

Find hourly flight availability from Houston 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 febrero 20, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 27% on flights from Houston to Porto by exploring options for tickets in the afternoon.

Rainfall in Porto by month

Plan your trip to Porto by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Porto ranges from 0.7 - 7.7 inches per month. December is typically the wettest month, when rainfall can reach 7.7 in. July is typically the driest time to visit Porto when rainfall is around 0.7 in.

Temperature in Porto by month

Plan your trip to Porto by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Porto, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

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 febrero 20, 2025.
To help decide which airline to fly from Houston to Porto, see what other customers have to say about Delta, KLM and SWISS. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,219 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
8,219 reviews
Delta
8.0
Very good
8,219 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
8,219 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

SWISS
7.5
Good
1,568 reviews
Delta
8.0
Very good
8,219 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air France
7.4
Good
1,449 reviews
Delta
8.0
Very good
8,219 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines
7.4
Good
8,765 reviews
Delta
8.0
Very good
8,219 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Houston 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?

    If you book a flight to Porto from Houston, you will be flying to Porto, which is the city’s only airport. Porto (OPO) is located 6.8 mi from the center of Porto. There are 0 flights from Houston to Porto per day from 4 different airlines.

  • What are the cheapest airlines flying from Houston to Porto round-trip?

    Flying on United Airlines is currently your cheapest option to Porto, with prices starting at $627. Additional round-trip tickets that might be worth considering are offered by KLM and Delta, with the lowest prices starting at $631 and $646, respectively. These flights start at 46% lower than the current average price 3 months from now.

  • Can I find deals for flights from Houston to Porto that include hotel bookings?

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

  • How can I find direct flights from Houston to Porto?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Houston to Porto.

  • Can I find deals for business class flights from Houston to Porto?

    Yes. Cheapflights offers flight deals from Houston 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 to Porto?

    Currently, January is the cheapest month in which you can book a flight from Houston to Porto (average of $523). Flying from Houston to Porto in June is currently the most expensive (average of $1,092). 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 Houston?

Book flights to Houston if you plan to visit one of these locations
Aveiro
Coimbra
Matosinhos
Arcos de Valdevez

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Top 4 airlines flying from Houston to Porto

Discover the top 4 airlines that operate flights from Houston 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 febrero 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$644Average$1,055FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$679Average$1,651FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$697Average$1,230FlexibilityNo cancel feeOn-time69%
DeltaCheapest$717Average$1,026FlexibilityNo cancel feeOn-timeN/A
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