What is the cheapest airline that flies from Houston to Portugal?

Scandinavian Airlines, United Airlines, and Virgin Atlantic are the most popular carriers operating from Houston to Portugal

What airlines fly to Portugal?

United Airlines, British Airways and Air Canada are the top three most popular airlines that fly to Portugal from Houston according to our data. United Airlines is the first choice among our users, with 54% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 9 different airlines that fly to Portugal on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Houston to Portugal?

Prices for flights from Houston to Portugal refresh daily.

How many operators does momondo search for flights from Houston to Portugal?

There are 9 operators available for flights from Houston to Portugal as of September 2025.

How old do you have to be to fly from Houston to Portugal?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Houston to Portugal.

What documentation or ID do you need to fly to Portugal?

The necessary travel and health documents for your Portugal trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$260 Cheap Flights from Houston to Portugal in 2025/26

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Find the cheapest flights from Houston to Portugal

Round-trip

One-way

Last minute

Cheap round-trip flights

2:30 pm - 9:30 amIAH-OPO

14h 00m1 stop

6:00 am - 6:00 pmOPO-IAH

18h 00m1 stop

$600United Airlines

Find Deal

Sun, Mar 15 - Thu, Apr 2

2:30 pm - 9:30 amIAH-OPO

14h 00m2 stops

6:00 am - 6:00 pmOPO-IAH

18h 00m1 stop

$604United Airlines

Find Deal

Sun, Mar 15 - Thu, Apr 2

4:30 pm - 9:30 amIAH-OPO

12h 00m1 stop

6:00 am - 12:20 amOPO-IAH

24h 20m2 stops

$610United Airlines

Find Deal

Sun, Mar 15 - Wed, Apr 1

6:10 pm - 8:55 amIAH-LIS

32h 45m2 stops

5:00 am - 9:44 pmLIS-IAH

22h 44m2 stops

$618Air Canada

Find Deal

Fri, Feb 20 - Fri, Mar 6

6:00 am - 8:00 amIAH-LIS

20h 00m1 stop

5:40 am - 1:35 pmLIS-IAH

13h 55m1 stop

$622Delta

Find Deal

Tue, Oct 14 - Wed, Oct 22

11:55 am - 9:20 amIAH-LIS

15h 25m1 stop

10:50 am - 11:09 amLIS-IAH

30h 19m1 stop

$624Air Canada

Find Deal

Sun, Nov 30 - Sun, Dec 7

4:50 pm - 2:15 pmIAH-FNC

16h 25m1 stop

3:55 pm - 2:05 pmFNC-IAH

28h 10m1 stop

$627British Airways

Find Deal

Mon, Oct 27 - Wed, Nov 12

7:25 pm - 8:00 amIAH-LIS

30h 35m1 stop

5:40 am - 1:35 pmLIS-IAH

13h 55m1 stop

$633Delta

Find Deal

Sun, Oct 12 - Tue, Oct 21

3:50 pm - 5:50 pmIAH-LIS

20h 00m1 stop

6:50 pm - 1:35 pmLIS-IAH

24h 45m1 stop

$636Air France

Find Deal

Mon, Oct 13 - Mon, Oct 20

12:15 pm - 8:00 pmHOU-OPO

25h 45m2 stops

8:20 am - 7:50 pmOPO-HOU

17h 30m2 stops

$640British Airways

Find Deal

Wed, Nov 19 - Wed, Nov 26

British Airways flights from Houston to Portugal

Our best British Airways deals on Houston to Portugal flight tickets

British Airways

Oct 27

IAH4:50 pmHouston George Bush Intcntl

16h 25m

1 stop

FNC2:15 pmFunchal Madeira

Nov 12

FNC3:55 pmFunchal Madeira

28h 10m

1 stop

IAH2:05 pmHouston George Bush Intcntl

$627

Find similar

British Airways

Nov 19

HOU12:15 pmHouston Hobby

25h 45m

2 stops

OPO8:00 pmPorto

Nov 26

OPO8:20 amPorto

17h 30m

2 stops

HOU7:50 pmHouston Hobby

$640

Find similar

British Airways

Mar 1

IAH3:50 pmHouston George Bush Intcntl

14h 15m

1 stop

LIS12:05 pmLisbon Humberto Delgado

Mar 14

LIS10:30 amLisbon Humberto Delgado

16h 04m

1 stop

IAH9:34 pmHouston George Bush Intcntl

$649

Find similar

Delta flights from Houston to Portugal

Our best Delta deals on Houston to Portugal flight tickets

Delta

Oct 14

IAH6:00 amHouston George Bush Intcntl

20h 00m

1 stop

LIS8:00 amLisbon Humberto Delgado

Oct 22

LIS5:40 amLisbon Humberto Delgado

13h 55m

1 stop

IAH1:35 pmHouston George Bush Intcntl

$622

Find similar

Delta

Oct 12

IAH7:25 pmHouston George Bush Intcntl

30h 35m

1 stop

LIS8:00 amLisbon Humberto Delgado

Oct 21

LIS5:40 amLisbon Humberto Delgado

13h 55m

1 stop

IAH1:35 pmHouston George Bush Intcntl

$633

Find similar

Delta

Oct 13

IAH10:00 amHouston George Bush Intcntl

16h 00m

1 stop

LIS8:00 amLisbon Humberto Delgado

Oct 20

LIS12:10 pmLisbon Humberto Delgado

31h 25m

1 stop

IAH1:35 pmHouston George Bush Intcntl

$635

Find similar

Fly from

Fly to

Route

Depart

Return

Price

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 3/15

2:30 pm-9:30 am

1 stop14h 00m

Porto

Thu 4/2

6:00 am-6:00 pm

1 stop18h 00m

$600

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 3/15

2:30 pm-9:30 am

2 stops14h 00m

Porto

Thu 4/2

6:00 am-6:00 pm

1 stop18h 00m

$604

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 3/15

4:30 pm-9:30 am

1 stop12h 00m

Porto

Wed 4/1

6:00 am-12:20 am

2 stops24h 20m

$610

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Fri 2/20

6:10 pm-8:55 am

2 stops32h 45m

Lisbon Humberto Delgado

Fri 3/6

5:00 am-9:44 pm

2 stops22h 44m

$618

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Tue 10/14

6:00 am-8:00 am

1 stop20h 00m

Lisbon Humberto Delgado

Wed 10/22

5:40 am-1:35 pm

1 stop13h 55m

$622

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Sun 11/30

11:55 am-9:20 am

1 stop15h 25m

Lisbon Humberto Delgado

Sun 12/7

10:50 am-11:09 am

1 stop30h 19m

$624

HoustonFunchal

IAH - FNC

IAHFNC

Houston George Bush Intcntl

Mon 10/27

4:50 pm-2:15 pm

1 stop16h 25m

Funchal Madeira

Wed 11/12

3:55 pm-2:05 pm

1 stop28h 10m

$627

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Sun 10/12

7:25 pm-8:00 am

1 stop30h 35m

Lisbon Humberto Delgado

Tue 10/21

5:40 am-1:35 pm

1 stop13h 55m

$633

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Mon 10/13

3:50 pm-5:50 pm

1 stop20h 00m

Lisbon Humberto Delgado

Mon 10/20

6:50 pm-1:35 pm

1 stop24h 45m

$636

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Wed 11/19

12:15 pm-8:00 pm

2 stops25h 45m

Porto

Wed 11/26

8:20 am-7:50 pm

2 stops17h 30m

$640

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Houston to Portugal

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Portugal?

The cheapest month to fly to Portugal from Houston is in February. Flight prices, which tend to average around $617, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Portugal from Houston during March instead. Flights to Portugal in March, while not as cheap as those in February, still average around $694.

What is the cheapest day to depart on your flight to Portugal?

According to our data, Sunday is the cheapest day to fly to Portugal from Houston. The lowest ticket price found for a Sunday departure recently was $825. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Portugal is Wednesday, with ticket prices averaging around $1,199.

What is the cheapest time of day to depart on your flight to Portugal?

Our most recent data shows that the best time of day to fly to Portugal is in the evening. Flights from Houston to Portugal during this time can be as low as $913. At noon is when there is more demand to fly to Portugal, so prices are often more expensive at around $1,116 per ticket.

How far in advance should I book a flight to Portugal?

You are more likely to see cheaper flights to Portugal from Houston when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around $850 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portugal from Houston for as low as $689 on momondo.

Cheap Houston to Portugal flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Houston to Portugal

Direct flights	None

There are no direct flights from Houston to Portugal. There are no popular flight routes from Houston to Portugal.

Search flight deals

When did momondo last update prices for flights from Houston to Portugal?
Prices for flights from Houston to Portugal refresh daily.
How many operators does momondo search for flights from Houston to Portugal?
There are 9 operators available for flights from Houston to Portugal as of September 2025.
How old do you have to be to fly from Houston to Portugal?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Houston to Portugal.
What documentation or ID do you need to fly to Portugal?
The necessary travel and health documents for your Portugal trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Houston to Portugal

Compare and see reviews for airlines that fly from Houston to Portugal with momondo

Airline	Rating	Free Cancellation	Price
Air France	PriceFrom $549	Free Cancellation	Rating 7.4 1,468 reviews	Search Air France flights
Air Canada	PriceFrom $563	Free Cancellation	Rating 7.1 10,000 reviews	Search Air Canada flights
United Airlines	PriceFrom $576	Free Cancellation	Rating 7.4 8,926 reviews	Search United Airlines flights
American Airlines	PriceFrom $578	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
British Airways	PriceFrom $585	Free Cancellation	Rating 6.7 7,367 reviews	Search British Airways flights
Delta	PriceFrom $615	Free Cancellation	Rating 7.9 7,961 reviews	Search Delta flights
KLM	PriceFrom $629	Free Cancellation	Rating 7.8 1,386 reviews	Search KLM flights
Turkish Airlines	PriceFrom $637	Free Cancellation	Rating 7.3 3,965 reviews	Search Turkish Airlines flights
Lufthansa	PriceFrom $679	Free Cancellation	Rating 6.8 7,409 reviews	Search Lufthansa flights

Why use momondo?

Why should I use momondo to find a flight deal from Houston to Portugal?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Houston to Portugal. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Houston to Portugal with flexible booking policies on momondo?

All flight searches from Houston to Portugal on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Houston to Portugal?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Houston to Portugal.

I’m not ready to book a flight from Houston to Portugal right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Portugal from Houston. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.