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$283+ Cheap flights from Houston 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 7/23. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — OPO
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 junio 12, 2025.

Round-trip from

$642
(Iberia)

One-way from

$283
(Kiwi.com)

Popular in

December

Cheapest in

November

Average price

$1,451
From Houston to Porto
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One-way flight from Houston to Porto
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Highest demand for flights based on searches. 3% potential increase in price ($38 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($56 potential savings vs. average RT price).
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Average for round-trip flights in June 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 junio 12, 2025.

This Iberia deal was found by Cheapflights users on 6/11. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/296:21 pmIAH - OPO
2 stops16h 39mIberia
lun. 11/38:40 pmOPO - IAH
2 stops28h 46mIberia
Deal found 6/11$642
This United Airlines deal was found by Cheapflights users on 6/9. 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.
dom. 10/191:25 pmIAH - OPO
1 stop14h 20mUnited Airlines
vie. 10/3112:30 pmOPO - IAH
1 stop35h 45mUnited Airlines
Deal found 6/9$648
This KLM deal was found by Cheapflights users on 6/11. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/294:30 pmIAH - OPO
1 stop13h 00mKLM
lun. 11/311:15 amOPO - IAH
1 stop32h 15mKLM
Deal found 6/11$650
This American Airlines deal was found by Cheapflights users on 6/11. 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.
mié. 10/296:21 pmIAH - OPO
2 stops16h 39mAmerican Airlines
lun. 11/38:40 pmOPO - IAH
2 stops20h 38mAmerican Airlines
Deal found 6/11$657
This Air France deal was found by Cheapflights users on 6/11. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/281:15 pmIAH - OPO
2 stops16h 35mMultiple Airlines
dom. 11/24:10 pmOPO - IAH
1 stop27h 20mMultiple Airlines
Deal found 6/11$679
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/286:36 pmIAH - OPO
2 stops22h 49mLufthansa
dom. 11/25:15 amOPO - IAH
2 stops22h 42mLufthansa
Deal found 6/11$689
This KAYAK deal was found by Cheapflights users on 6/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/611:27 amIAH - OPO
2 stops14h 13mBritish Airways
dom. 11/98:20 amOPO - IAH
2 stops17h 45mBritish Airways
Deal found 6/10$757
This Air Canada deal was found by Cheapflights users on 6/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/710:00 amIAH - OPO
2 stops19h 30mAir Canada
jue. 10/166:00 amOPO - IAH
2 stops22h 09mAir Canada
Deal found 6/11$760
This FlightHub deal was found by Cheapflights users on 6/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/272:25 pmIAH - OPO
1 stop19h 25mTurkish Airlines
jue. 9/411:05 amOPO - IAH
1 stop38h 00mTurkish Airlines
Deal found 6/10$772
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/52:20 pmIAH - OPO
2 stops19h 10mDelta
jue. 8/216:30 amOPO - IAH
2 stops22h 44mDelta
Deal found 6/10$804
This Delta deal was found by Cheapflights users on 6/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/286:00 amHOU - OPO
2 stops23h 50mDelta
dom. 11/25:00 amOPO - HOU
2 stops22h 40mDelta
Deal found 6/11$824
This American Airlines deal was found by Cheapflights users on 6/12. 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.
lun. 9/294:28 pmHOU - OPO
2 stops17h 27mAmerican Airlines
sáb. 10/1112:20 pmOPO - HOU
2 stops17h 24mAmerican Airlines
Deal found 6/12$827

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 junio 12, 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

mié. 10/29

6:21 pm-4:00 pm

2 stops16h 39m

Porto

lun. 11/3

8:40 pm-7:26 pm

2 stops28h 46m

$642

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

dom. 10/19

1:25 pm-9:45 am

1 stop14h 20m

Porto

vie. 10/31

12:30 pm-7:15 pm

1 stop35h 45m

$648

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

mié. 10/29

4:30 pm-10:30 am

1 stop13h 00m

Porto

lun. 11/3

11:15 am-1:30 pm

1 stop32h 15m

$650

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

mié. 10/29

6:21 pm-4:00 pm

2 stops16h 39m

Porto

lun. 11/3

8:40 pm-11:18 am

2 stops20h 38m

$657

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

mar. 10/28

1:15 pm-10:50 am

2 stops16h 35m

Porto

dom. 11/2

4:10 pm-1:30 pm

1 stop27h 20m

$679

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

mar. 10/28

6:36 pm-10:25 pm

2 stops22h 49m

Porto

dom. 11/2

5:15 am-10:57 pm

2 stops22h 42m

$689

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

jue. 11/6

11:27 am-7:40 am

2 stops14h 13m

Porto

dom. 11/9

8:20 am-8:05 pm

2 stops17h 45m

$757

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

mar. 10/7

10:00 am-11:30 am

2 stops19h 30m

Porto

jue. 10/16

6:00 am-10:09 pm

2 stops22h 09m

$760

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

mié. 8/27

2:25 pm-3:50 pm

1 stop19h 25m

Porto

jue. 9/4

11:05 am-7:05 pm

1 stop38h 00m

$772

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

mar. 8/5

2:20 pm-3:30 pm

2 stops19h 10m

Porto

jue. 8/21

6:30 am-11:14 pm

2 stops22h 44m

$804

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 21 results
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2
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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.

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 $1,047). 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 junio 12, 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 junio 12, 2025.
To help decide which airline to fly from Houston to Porto, see what other customers have to say about Delta, KLM and Austrian Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,950 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Austrian Airlines
7.6
Good
802 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,623 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 Iberia is currently your cheapest option to Porto, with prices starting at $642. Additional round-trip tickets that might be worth considering are offered by United Airlines and KLM, with the lowest prices starting at $648 and $650, respectively. These flights start at 43% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Houston to Porto one-way?

    For one-way options, check prices for Lufthansa. According to our data, you can fly for as low as $519. Users have also found prices from $583 and $596 on United Airlines and Iberia, respectively.

  • 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 $1,047). 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$494Average$954FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$629Average$1,140FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$677Average$1,073FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$679Average$1,404FlexibilityNo cancel feeOn-time76%

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