Portugal

$341+ 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 8/10. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — LIS
Jul 19 — Jul 261
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Cheap 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 June 19, 2026.

This Gotogate deal was found by Cheapflights users on 6/18. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/312:10 pm
IAH
-
LIS
1 stop15h 40m
Multiple Airlines
Wed 11/185:00 am
LIS
-
IAH
1 stop15h 00m
Multiple Airlines
Deal found 6/18$708
This United Airlines deal was found by Cheapflights users on 6/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/611:00 am
IAH
-
OPO
1 stop16h 30m
United Airlines
Thu 12/106:00 am
OPO
-
IAH
2 stops22h 30m
United Airlines
Deal found 6/18$718
This United Airlines deal was found by Cheapflights users on 6/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1811:55 am
IAH
-
LIS
1 stop16h 25m
United Airlines
Fri 11/275:00 am
LIS
-
IAH
1 stop15h 00m
United Airlines
Deal found 6/18$724
This American Airlines deal was found by Cheapflights users on 6/17. 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.
Sun 11/89:28 am
IAH
-
OPO
2 stops16h 12m
American Airlines
Fri 11/1312:25 pm
OPO
-
IAH
2 stops18h 05m
American Airlines
Deal found 6/17$730
This Booking.com deal was found by Cheapflights users on 6/18. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/36:10 pm
IAH
-
LIS
2 stops34h 50m
Air Canada
Wed 11/185:00 am
LIS
-
IAH
2 stops18h 08m
Air Canada
Deal found 6/18$736
This Air Canada deal was found by Cheapflights users on 6/18. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1812:10 pm
IAH
-
LIS
2 stops16h 50m
Air Canada
Fri 11/2711:20 am
LIS
-
IAH
1 stop16h 19m
Air Canada
Deal found 6/18$747
This United Airlines deal was found by Cheapflights users on 6/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/185:05 pm
IAH
-
LIS
1 stop11h 10m
United Airlines
Tue 12/15:00 am
LIS
-
IAH
1 stop19h 15m
United Airlines
Deal found 6/18$755
This United Airlines deal was found by Cheapflights users on 6/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/228:18 pm
IAH
-
LIS
1 stop29h 52m
United Airlines
Tue 12/11:00 pm
LIS
-
IAH
1 stop26h 05m
United Airlines
Deal found 6/18$762
This United Airlines deal was found by Cheapflights users on 6/16. 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 11/1012:10 pm
IAH
-
LIS
1 stop15h 40m
United Airlines
Wed 11/185:00 am
LIS
-
IAH
1 stop15h 00m
United Airlines
Deal found 6/16$766
This United Airlines deal was found by Cheapflights users on 6/17. 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 11/117:40 am
IAH
-
LIS
1 stop18h 30m
United Airlines
Thu 11/195:00 am
LIS
-
IAH
1 stop19h 15m
United Airlines
Deal found 6/17$767
This Air France deal was found by Cheapflights users on 6/17. 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.
Wed 10/285:05 pm
IAH
-
LIS
1 stop13h 15m
Multiple Airlines
Mon 11/211:30 am
LIS
-
IAH
1 stop31h 35m
Multiple Airlines
Deal found 6/17$769
This Air France deal was found by Cheapflights users on 6/17. 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.
Tue 10/203:55 pm
IAH
-
OPO
1 stop17h 30m
Multiple Airlines
Tue 11/35:00 am
OPO
-
IAH
1 stop14h 05m
Multiple Airlines
Deal found 6/17$769

Find flight deals from Houston to Portugal

Keep the following information in mind while searching for Houston to Portugal flight deals. Data was last updated June 19, 2026.

Round-trip from

$708
(Gotogate)

One-way from

$341
(Kiwi.com)

Popular in

June

Cheapest in

April

Average price

$1,365
From Houston to Portugal
One-way flight from Houston to Portugal
Highest demand for flights based on searches. 23% potential increase in price ($282 potential increase over avg. RT price).
Cheapest flight prices on average. 5% potential price decrease ($43 potential savings vs. average RT price).
Average for round-trip flights in June 2026

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 June 19, 2026.
Use the filters below to find and compare flights from Houston to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 12/7

2:30 pm-9:30 am

1 stop13h 00m

Porto

Thu 12/10

6:00 am-6:44 pm

2 stops18h 44m

$718

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 12/6

8:40 am-9:30 am

2 stops18h 50m

Porto

Thu 12/10

6:00 am-6:44 pm

2 stops18h 44m

$722
Quickest round-trip

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Tue 11/10

12:10 pm-9:50 am

1 stop15h 40m

Lisbon Humberto Delgado

Wed 11/18

5:00 am-2:00 pm

1 stop15h 00m

$766

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Mon 12/7

9:45 am-8:10 am

2 stops16h 25m

Lisbon Humberto Delgado

Wed 12/9

10:15 am-10:35 pm

2 stops18h 20m

$794

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Fri 10/16

6:50 pm-4:00 pm

2 stops15h 10m

Porto

Wed 10/21

12:25 pm-12:19 am

2 stops17h 54m

$836

HoustonFunchal

IAH - FNC

IAHFNC

Houston George Bush Intcntl

Wed 11/11

4:10 pm-5:10 pm

2 stops43h 00m

Funchal Madeira

Wed 11/18

10:25 am-1:25 pm

1 stop33h 00m

$841

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Fri 10/16

10:00 am-7:10 am

1 stop15h 10m

Porto

Wed 10/21

11:20 am-11:41 am

2 stops30h 21m

$864

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Fri 10/16

10:00 am-7:10 am

1 stop15h 10m

Porto

Tue 10/20

11:15 am-11:41 am

2 stops30h 26m

$864

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 8/9

9:45 am-10:25 am

2 stops18h 40m

Porto

Tue 8/25

12:25 pm-11:52 pm

2 stops17h 27m

$868

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Fri 10/16

3:55 pm-3:25 pm

1 stop17h 30m

Porto

Wed 10/21

11:45 am-1:15 pm

1 stop31h 30m

$868

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/16

Showing 1-10 of 57 resultsSorted by cheapest first
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6

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, March is the cheapest month in which you can book a flight from Houston to Portugal (average of $395). Flying from Houston to Portugal in June is currently the most expensive (average of $1,089). 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.

How far ahead should I book a flight from Houston to Portugal?

The best time to book flights from Houston to Portugal is 69 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 June 19, 2026.
Get a feel of what it's like to fly with KLM,Delta, andAir France 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.

Boarding

7.8

Comfort

7.7

Crew

8.4

Overall

7.8

Entertainment

7.2

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

Boarding

7.8

Comfort

7.7

Crew

8.4

Overall

7.8

Entertainment

7.2

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

Boarding

7.8

Comfort

7.7

Crew

8.4

Overall

7.8

Entertainment

7.2

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

Boarding

7.8

Comfort

7.7

Crew

8.4

Overall

7.8

Entertainment

7.2

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

Boarding

7.8

Comfort

7.7

Crew

8.4

Overall

7.8

Entertainment

7.2

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

Boarding

7.8

Comfort

7.7

Crew

8.4

Overall

7.8

Entertainment

7.2

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

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 $718, United Airlines can have you in Portugal from Houston in 13h. 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 British Airways, which is currently one of the cheapest options available, starting at $337. United Airlines flights start at $410 while deals on KLM start at $547 one-way.

  • What are the most popular routes 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, March is the cheapest month in which you can book a flight from Houston to Portugal (average of $395). Flying from Houston to Portugal in June is currently the most expensive (average of $1,089). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 8 airlines flying from Houston to Portugal

Discover the top 8 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 June 19, 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$395Average$627FlexibilityNo cancel feeOn-time76%
DeltaCheapest$466Average$868FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$476Average$940FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$540Average$768FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$559Average$858FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$581Average$1,008FlexibilityNo cancel feeOn-time69%
Turkish AirlinesCheapest$621Average$734FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$646Average$870FlexibilityNo cancel feeOn-time67%

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