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Portugal

$293+ Cheap flights from Houston to Portugal

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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — LIS
Nov 21 — Nov 281
Fri 11/21
Fri 11/28
1 adult, Economy
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Find flight deals from Houston to Portugal

Cheapest flights from Houston to Portugal
Explore the most affordable flight options available from Houston to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 22, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/22. 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.
Sat 12/64:30 pmIAH - OPO
1 stop16h 35mLufthansa
Sat 12/1312:30 pmOPO - IAH
1 stop32h 05mLufthansa
Deal found 10/22$515
This Delta deal was found by Cheapflights users on 10/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/184:05 pmIAH - OPO
1 stop12h 25mDelta
Thu 11/276:35 amOPO - IAH
1 stop36h 55mDelta
Deal found 10/20$527
This KLM deal was found by Cheapflights users on 10/22. 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.
Sat 12/612:55 pmIAH - OPO
2 stops15h 35mKLM
Sat 12/136:00 amOPO - IAH
2 stops20h 18mKLM
Deal found 10/22$532
This United Airlines deal was found by Cheapflights users on 10/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/182:38 pmIAH - OPO
1 stop12h 52mUnited Airlines
Tue 12/212:30 pmOPO - IAH
2 stops26h 40mUnited Airlines
Deal found 10/20$533
This Delta deal was found by Cheapflights users on 10/22. 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.
Sat 12/64:05 pmIAH - OPO
1 stop12h 25mDelta
Sat 12/136:00 amOPO - IAH
2 stops20h 18mDelta
Deal found 10/22$536
This Delta deal was found by Cheapflights users on 10/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/184:05 pmIAH - OPO
1 stop12h 25mDelta
Mon 12/111:15 amOPO - IAH
2 stops39h 56mDelta
Deal found 10/20$537
This Mytrip deal was found by Cheapflights users on 10/22. 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.
Sat 12/611:55 amIAH - OPO
2 stops24h 40mMultiple Airlines
Sat 12/1312:30 pmOPO - IAH
1 stop32h 05mMultiple Airlines
Deal found 10/22$538
This Delta deal was found by Cheapflights users on 10/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/243:30 pmIAH - OPO
1 stop13h 00mDelta
Mon 12/111:15 amOPO - IAH
2 stops39h 56mDelta
Deal found 10/20$542
This United Airlines deal was found by Cheapflights users on 10/21. 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.
Wed 11/192:38 pmIAH - OPO
1 stop12h 52mUnited Airlines
Sun 11/2312:35 pmOPO - IAH
1 stop15h 56mUnited Airlines
Deal found 10/21$543
This Delta deal was found by Cheapflights users on 10/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/184:05 pmIAH - OPO
1 stop12h 25mDelta
Tue 12/211:25 amOPO - IAH
1 stop32h 30mDelta
Deal found 10/20$545
This Air France deal was found by Cheapflights users on 10/20. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/1512:42 pmIAH - LIS
1 stop14h 18mKLM
Mon 12/2211:25 amLIS - IAH
1 stop32h 05mKLM
Deal found 10/20$591
This United Airlines deal was found by Cheapflights users on 10/21. 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.
Thu 11/1311:50 amIAH - LIS
1 stop15h 30mUnited Airlines
Tue 11/185:00 amLIS - IAH
1 stop19h 15mUnited Airlines
Deal found 10/21$597

Cheap flight deals from Houston to Portugal

Keep the following information in mind while searching for Houston to Portugal flight deals. Data was last updated October 22, 2025.

Round-trip from

$527
(Delta)

One-way from

$293
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$792
From Houston to Portugal
Search Deals
One-way flight from Houston to Portugal
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($197 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Houston to Portugal 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 October 22, 2025.
Use the filters below to find and compare flights from Houston to Portugal that are best for you.

Fly from

Houston

Fly to

Portugal

Route

Depart

Return

Price

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sat 12/6

4:30 pm-3:05 pm

1 stop16h 35m

Porto

Sat 12/13

12:30 pm-2:35 pm

1 stop32h 05m

$515

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 11/19

6:06 am-10:30 am

2 stops22h 24m

Porto

Thu 11/27

6:35 am-1:30 pm

1 stop36h 55m

$531

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 11/18

5:15 am-10:30 am

2 stops23h 15m

Porto

Thu 11/27

11:15 am-1:30 pm

1 stop32h 15m

$531

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sat 12/6

4:05 pm-10:30 am

1 stop12h 25m

Porto

Sat 12/13

6:00 am-8:18 pm

2 stops20h 18m

$532

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 11/18

2:38 pm-9:30 am

1 stop12h 52m

Porto

Tue 12/2

12:30 pm-9:10 am

2 stops26h 40m

$533

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sat 12/6

4:05 pm-10:30 am

1 stop12h 25m

Porto

Sat 12/13

6:00 am-8:18 pm

2 stops20h 18m

$536

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 11/23

7:30 am-9:30 am

2 stops20h 00m

Porto

Tue 12/2

12:30 pm-10:57 am

2 stops28h 27m

$537

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Thu 11/13

11:50 am-9:20 am

1 stop15h 30m

Lisbon Humberto Delgado

Tue 11/18

5:00 am-6:15 pm

1 stop19h 15m

$597

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Mon 1/5

7:50 pm-9:20 am

2 stops31h 30m

Lisbon Humberto Delgado

Fri 1/16

5:00 am-6:15 pm

1 stop19h 15m

$606

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Tue 12/16

8:18 am-9:05 am

1 stop18h 47m

Lisbon Humberto Delgado

Sun 12/21

11:05 am-10:56 pm

1 stop17h 51m

$610

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/21

Showing 1-10 of 53 results
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Best time to book a flight from Houston to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal 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 Portugal

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

Currently, February is the cheapest month in which you can book a flight from Houston to Portugal (average of $511). Flying from Houston to Portugal in June is currently the most expensive (average of $824). 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 PT?

Find hourly flight availability from Houston to Portugal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 22, 2025.

When flying from Houston to Portugal, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 14% versus a flight at noon.

What is the cheapest day to fly from Houston to Portugal?

Use this chart to determine the cheapest time to fly round-trip from Houston to Portugal. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Houston to Portugal flight should consider departing on Sunday afternoons when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Portugal

Get insights into the airlines that provide service to Portugal. 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 Portugal. Reviews last updated October 22, 2025.
Get a feel of what it's like to fly with Delta, Air France, and United Airlines from Houston to Portugal by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,979 reviews

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,979 reviews
Delta
7.9
Good
7,979 reviews

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Air France
7.4
Good
1,477 reviews
Delta
7.9
Good
7,979 reviews

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,988 reviews
Delta
7.9
Good
7,979 reviews

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Air Canada
7.1
Good
10,342 reviews
Delta
7.9
Good
7,979 reviews

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
British Airways
6.7
Okay
7,467 reviews
Delta
7.9
Good
7,979 reviews

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Related info for your journey

Find useful and relevant information for your journey from Houston to Portugal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Houston to Portugal?

    For as low as $532, Lufthansa can have you in Portugal from Houston in 12h 25m. There are 4726 mi between Houston and Portugal. This flight may include one or multiple stops.

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

    To fly one-way, consider booking your trip with KLM, which is currently one of the cheapest options available, starting at $443. Air France flights start at $467 while deals on Delta start at $467 one-way.

  • What are the most popular routes from Houston to Portugal?

    While some choose either Houston George Bush Intcntl - Lisbon Humberto Delgado or Houston Hobby - Porto, Houston Hobby - Lisbon Humberto Delgado is the most popular route from Houston to Portugal.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Houston to Portugal 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 Portugal?

    Currently, February is the cheapest month in which you can book a flight from Houston to Portugal (average of $511). Flying from Houston to Portugal in June is currently the most expensive (average of $824). 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

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Alternative routes for Houston to Portugal

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Top 9 airlines flying from Houston to Portugal

Discover the top 9 airlines that operate flights from Houston to Portugal. 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 October 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$517Average$866FlexibilityNo cancel feeOn-time71%
Air FranceCheapest$549Average$809FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$563Average$906FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$572Average$1,010FlexibilityNo cancel feeOn-time69%
KLMCheapest$595Average$1,079FlexibilityNo cancel feeOn-time75%
DeltaCheapest$595Average$853FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$601Average$1,031FlexibilityNo cancel feeOn-time70%
Turkish AirlinesCheapest$628Average$737FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$679Average$1,404FlexibilityNo cancel feeOn-time76%

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