Portugal

$303+ 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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — LIS
Jul 29 — Aug 51
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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 29, 2026.

This Gotogate deal was found by Cheapflights users on 6/25. 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.
Mon 11/211:50 am
IAH
-
LIS
1 stop16h 50m
Multiple Airlines
Fri 11/275:00 am
LIS
-
IAH
1 stop15h 00m
Multiple Airlines
Deal found 6/25$706
This United Airlines deal was found by Cheapflights users on 6/24. 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.
Mon 12/71:35 pm
IAH
-
OPO
1 stop13h 55m
United Airlines
Thu 12/106:00 am
OPO
-
IAH
1 stop18h 15m
United Airlines
Deal found 6/24$707
This KLM deal was found by Cheapflights users on 6/25. 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.
Sun 11/84:05 pm
IAH
-
OPO
1 stop12h 30m
KLM
Fri 11/135:00 am
OPO
-
IAH
1 stop14h 05m
KLM
Deal found 6/25$708
This Delta deal was found by Cheapflights users on 6/25. 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.
Sun 11/88:15 am
IAH
-
OPO
2 stops20h 20m
Delta
Fri 11/135:00 am
OPO
-
IAH
1 stop14h 05m
Delta
Deal found 6/25$712
This Gotogate deal was found by Cheapflights users on 6/25. 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 11/1711:50 am
IAH
-
LIS
2 stops15h 30m
Multiple Airlines
Tue 11/245:00 am
LIS
-
IAH
1 stop15h 00m
Multiple Airlines
Deal found 6/25$713
This Air France deal was found by Cheapflights users on 6/28. 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 12/74:05 pm
IAH
-
OPO
1 stop12h 30m
Multiple Airlines
Thu 12/105:00 am
OPO
-
IAH
2 stops17h 35m
Multiple Airlines
Deal found 6/28$718
This United deal was found by Cheapflights users on 6/25. 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.
Sun 11/88:34 pm
IAH
-
OPO
2 stops30h 56m
Multiple Airlines
Fri 11/136:00 am
OPO
-
IAH
2 stops25h 01m
Multiple Airlines
Deal found 6/25$721
This United Airlines deal was found by Cheapflights users on 6/26. 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 11/1111:50 am
IAH
-
LIS
1 stop13h 05m
United Airlines
Thu 11/195:00 am
LIS
-
IAH
1 stop19h 15m
United Airlines
Deal found 6/26$722
This Delta deal was found by Cheapflights users on 6/25. 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.
Sun 11/810:05 am
HOU
-
OPO
2 stops17h 00m
Delta
Fri 11/135:00 am
OPO
-
HOU
2 stops22h 43m
Delta
Deal found 6/25$723
This United Airlines deal was found by Cheapflights users on 6/25. 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 11/107:30 am
IAH
-
LIS
1 stop18h 40m
United Airlines
Wed 11/185:00 am
LIS
-
IAH
1 stop19h 15m
United Airlines
Deal found 6/25$723
This Delta deal was found by Cheapflights users on 6/27. 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 11/187:00 am
IAH
-
LIS
1 stop19h 00m
Delta
Wed 12/211:30 am
LIS
-
IAH
1 stop31h 55m
Delta
Deal found 6/27$725
This FlightHub deal was found by Cheapflights users on 6/24. 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.
Tue 11/106:10 pm
IAH
-
LIS
2 stops32h 45m
Multiple Airlines
Wed 11/185:00 am
LIS
-
IAH
1 stop15h 00m
Multiple Airlines
Deal found 6/24$727

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 29, 2026.

Round-trip from

$706
(Gotogate)

One-way from

$303
(Kiwi.com)

Popular in

June

Cheapest in

April

Average price

$1,361
From Houston to Portugal
One-way flight from Houston to Portugal
Highest demand for flights based on searches. 27% potential increase in price ($346 potential increase over avg. RT price).
Cheapest flight prices on average. 4% potential price decrease ($40 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 29, 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

9:45 am-9:30 am

2 stops17h 45m

Porto

Thu 12/10

6:00 am-6:15 pm

1 stop18h 15m

$711

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Tue 11/10

7:30 am-8:10 am

1 stop18h 40m

Lisbon Humberto Delgado

Wed 11/18

5:00 am-6:15 pm

1 stop19h 15m

$723

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Wed 11/11

6:00 am-6:55 am

2 stops18h 55m

Lisbon Humberto Delgado

Thu 11/19

5:00 am-2:00 pm

1 stop15h 00m

$726

HoustonLisbon

HOU - LIS

HOULIS

Houston Hobby

Tue 11/10

1:00 pm-11:20 am

2 stops16h 20m

Lisbon Humberto Delgado

Wed 11/18

5:00 am-9:43 pm

2 stops22h 43m

$738

HoustonLisbon

HOU - LIS

HOULIS

Houston Hobby

Wed 11/11

6:00 am-11:20 am

2 stops23h 20m

Lisbon Humberto Delgado

Thu 11/19

5:00 am-4:30 pm

2 stops17h 30m

$739

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Wed 10/21

9:42 am-8:00 am

2 stops16h 18m

Lisbon Humberto Delgado

Wed 10/28

3:35 pm-2:25 pm

1 stop27h 50m

$760
Quickest round-trip

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Tue 10/13

10:00 am-9:20 am

1 stop17h 20m

Lisbon Humberto Delgado

Fri 10/23

11:25 am-7:52 pm

1 stop14h 27m

$768

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Sun 12/6

9:45 pm-10:40 am

2 stops30h 55m

Lisbon Humberto Delgado

Thu 12/10

5:00 am-2:00 pm

1 stop15h 00m

$769

HoustonLisbon

HOU - LIS

HOULIS

Houston Hobby

Wed 11/18

10:05 am-8:00 am

2 stops15h 55m

Lisbon Humberto Delgado

Tue 12/1

11:30 am-9:26 am

2 stops27h 56m

$770

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Wed 10/21

10:57 am-10:55 am

2 stops17h 58m

Lisbon Humberto Delgado

Wed 10/28

5:00 am-10:15 pm

2 stops22h 15m

$773

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/24

Showing 1-10 of 60 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, April is the cheapest month in which you can book a flight from Houston to Portugal (average of $404). 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 57 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 29, 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.

Overall

7.8

Boarding

7.8

Crew

8.4

Comfort

7.7

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

Overall

7.8

Boarding

7.8

Crew

8.4

Comfort

7.7

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

Overall

7.8

Boarding

7.8

Crew

8.4

Comfort

7.7

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

Overall

7.8

Boarding

7.8

Crew

8.4

Comfort

7.7

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

Overall

7.8

Boarding

7.8

Crew

8.4

Comfort

7.7

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

Overall

7.8

Boarding

7.8

Crew

8.4

Comfort

7.7

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 $760, United Airlines can have you in Portugal from Houston in 16h 18m. There are 4767 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, April is the cheapest month in which you can book a flight from Houston to Portugal (average of $404). 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 7 airlines flying from Houston to Portugal

Discover the top 7 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 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$466Average$868FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$476Average$940FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$540Average$782FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$559Average$834FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$581Average$1,034FlexibilityNo cancel feeOn-time69%
Turkish AirlinesCheapest$621Average$732FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$646Average$870FlexibilityNo cancel feeOn-time67%

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