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$741+ 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 11/1. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — OPO
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
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 March 31, 2025.

Round-trip from

$785
(Mytrip)

Popular in

December

Cheapest in

March

Average price

$738
From Houston to Porto
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($44 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($56 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
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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 March 31, 2025.

This Air Canada deal was found by Cheapflights users on 3/30. 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.
Sat 11/19:30 amIAH - OPO
2 stops24h 45mAir Canada
Sat 11/158:40 amOPO - IAH
2 stops19h 53mAir Canada
Deal found 3/30$741
This Booking.com deal was found by Cheapflights users on 3/30. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/18:10 pmHOU - OPO
2 stops42h 50mBritish Airways
Sat 11/158:20 amOPO - HOU
2 stops21h 25mBritish Airways
Deal found 3/30$754
This oojo deal was found by Cheapflights users on 3/29. 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.
Tue 10/79:00 pmIAH - OPO
1 stop31h 05mTurkish Airlines
Thu 10/164:50 pmOPO - IAH
1 stop25h 50mTurkish Airlines
Deal found 3/29$768
This United deal was found by Cheapflights users on 3/30. 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.
Tue 8/52:38 pmIAH - OPO
1 stop13h 07mUnited Airlines
Thu 8/2112:10 pmOPO - IAH
2 stops33h 25mUnited Airlines
Deal found 3/30$777
This Mytrip deal was found by Cheapflights users on 3/31. 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.
Wed 5/76:00 amIAH - OPO
3 stops33h 10mMultiple Airlines
Sun 5/185:55 amOPO - IAH
2 stops29h 00mMultiple Airlines
Deal found 3/31$785
This American Airlines deal was found by Cheapflights users on 3/30. 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.
Tue 10/76:43 pmHOU - OPO
2 stops15h 12mAmerican Airlines
Thu 10/1612:20 pmOPO - HOU
2 stops17h 24mAmerican Airlines
Deal found 3/30$815
This Iberia deal was found by Cheapflights users on 3/30. 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 10/74:25 pmIAH - OPO
2 stops17h 30mIberia
Thu 10/1612:20 pmOPO - IAH
2 stops17h 23mIberia
Deal found 3/30$815
This KLM deal was found by Cheapflights users on 3/30. 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.
Tue 4/223:30 pmIAH - OPO
1 stop24h 45mKLM
Wed 4/308:10 pmOPO - IAH
1 stop23h 05mKLM
Deal found 3/30$816
This Delta deal was found by Cheapflights users on 3/30. 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.
Tue 4/226:45 pmHOU - OPO
2 stops21h 30mDelta
Wed 4/306:20 amOPO - HOU
2 stops22h 48mDelta
Deal found 3/30$830
This Delta deal was found by Cheapflights users on 3/31. 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.
Wed 4/3010:55 amIAH - OPO
2 stops17h 45mDelta
Tue 5/136:20 amOPO - IAH
2 stops22h 37mDelta
Deal found 3/31$830
This KAYAK deal was found by Cheapflights users on 3/29. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/73:35 pmIAH - OPO
1 stop13h 40mLufthansa
Thu 10/166:15 amOPO - IAH
2 stops40h 40mLufthansa
Deal found 3/29$857
This Aeromexico deal was found by Cheapflights users on 3/31. 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.
Wed 4/303:50 pmIAH - OPO
1 stop34h 35mAir France
Mon 5/124:20 pmOPO - IAH
1 stop27h 15mAir France
Deal found 3/31$882

Cheapflights Fare Finder

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 March 31, 2025.
Use the filters below to find and compare flights from Houston to Porto that are best for you.

Fly from

Houston

Fly to

Porto

Route

Depart

Return

Price

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 5/7

6:00 am-9:10 pm

3 stops33h 10m

Porto

Sun 5/18

5:55 am-4:55 am

2 stops29h 00m

$785

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 4/22

9:30 am-11:30 am

2 stops20h 00m

Porto

Wed 4/30

6:00 am-11:14 am

2 stops35h 14m

$806

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 4/22

3:30 pm-10:15 pm

1 stop24h 45m

Porto

Wed 4/30

8:10 pm-1:15 pm

1 stop23h 05m

$816

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Tue 4/22

6:45 pm-10:15 pm

2 stops21h 30m

Porto

Wed 4/30

6:20 am-11:08 pm

2 stops22h 48m

$830

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 4/30

10:55 am-10:40 am

2 stops17h 45m

Porto

Tue 5/13

6:20 am-10:57 pm

2 stops22h 37m

$830

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 4/30

3:50 pm-8:25 am

1 stop34h 35m

Porto

Tue 5/13

4:20 pm-1:35 pm

1 stop27h 15m

$882

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sat 4/12

9:00 pm-9:55 am

1 stop30h 55m

Porto

Sat 4/19

4:50 pm-7:05 pm

1 stop32h 15m

$893

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 5/7

6:42 pm-10:45 pm

2 stops22h 03m

Porto

Sun 5/18

6:15 am-1:35 pm

2 stops37h 20m

$934

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 5/19

6:05 pm-3:45 pm

1 stop15h 40m

Porto

Tue 5/27

9:00 am-5:00 pm

1 stop14h 00m

$1,104

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 5/19

3:25 pm-7:50 pm

1 stop22h 25m

Porto

Mon 5/26

11:45 am-1:40 pm

1 stop31h 55m

$1,112

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

Showing 1-10 of 14 results
1
2

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.

Cheapflights Insights

Everything you need to know about your flight from Houston to Porto

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 $1,084). 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 March 31, 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 March 31, 2025.
To help decide which airline to fly from Houston to Porto, see what other customers have to say about Delta, KLM and Air France. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Comfort

8.0

Overall

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

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
7,899 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Comfort

8.0

Overall

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

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
1,321 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Comfort

8.0

Overall

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

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
1,425 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Comfort

8.0

Overall

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

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
8,614 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Comfort

8.0

Overall

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

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.
Turkish Airlines
7.3
Good
3,748 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Comfort

8.0

Overall

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

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 3 different airlines.

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

    Flying on Air Canada is currently your cheapest option to Porto, with prices starting at $806. Additional round-trip tickets that might be worth considering are offered by KLM and Delta, with the lowest prices starting at $816 and $830, respectively. These flights start at 30% 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 $1,084). 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 3 airlines flying from Houston to Porto

Discover the top 3 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 March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$494Average$1,026FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$635Average$1,061FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$697Average$1,206FlexibilityNo cancel feeOn-time69%
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