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

United Airlines, British Airways, and American Airlines are the most popular carriers operating from Houston to Portugal

What airlines fly to Portugal?

United Airlines, British Airways and Delta 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 59% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 8 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 8 operators available for flights from Houston to Portugal as of August 2026.

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.

$284 Cheap Flights from Houston to Portugal in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Houston to Portugal

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Cheap round-trip flights

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11:50 am - 6:55 amIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

13h 05m1 stop Montreal Pierre Elliott Trudeau Intl

5:00 am - 2:00 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

15h 00m1 stop Frankfurt am Main

$698Multiple Airlines

Wed, Nov 11 - Wed, Nov 18

11:50 am - 10:40 amIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

16h 50m1 stop Montreal Pierre Elliott Trudeau Intl

5:00 am - 2:00 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

15h 00m1 stop Frankfurt am Main

$701Multiple Airlines

Mon, Nov 16 - Wed, Nov 25

11:00 am - 9:30 amIAH Houston George Bush Intcntl-OPO Porto

16h 30m1 stop Newark

6:00 am - 6:15 pmOPO Porto-IAH Houston George Bush Intcntl

18h 15m1 stop Frankfurt am Main

$707United Airlines

Mon, Dec 7 - Fri, Dec 11

7:10 pm - 10:00 pmIAH Houston George Bush Intcntl-OPO Porto

20h 50m1 stop Paris Charles de Gaulle

5:00 am - 1:05 pmOPO Porto-IAH Houston George Bush Intcntl

14h 05m1 stop Amsterdam Schiphol

$709KLM

Sun, Nov 8 - Fri, Nov 13

4:10 pm - 11:45 amIAH Houston George Bush Intcntl-OPO Porto

13h 35m1 stop Frankfurt am Main

6:00 am - 7:10 pmOPO Porto-IAH Houston George Bush Intcntl

19h 10m2 stops Frankfurt am Main Chicago O'Hare Intl

$710Lufthansa

Sun, Nov 8 - Fri, Nov 13

9:45 am - 9:30 amIAH Houston George Bush Intcntl-OPO Porto

17h 45m2 stops Washington, D.C. Reagan-National Newark

6:00 am - 6:15 pmOPO Porto-IAH Houston George Bush Intcntl

18h 15m1 stop Frankfurt am Main

$711United Airlines

Mon, Dec 7 - Fri, Dec 11

4:10 pm - 2:50 pmIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

16h 40m1 stop Frankfurt am Main

5:00 am - 2:00 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

15h 00m1 stop Frankfurt am Main

$716Lufthansa

Wed, Nov 11 - Wed, Nov 18

9:40 pm - 5:40 pmIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

14h 00m1 stop London Heathrow

11:05 am - 10:30 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

17h 25m1 stop Philadelphia

$717British Airways

Tue, Jan 19 - Tue, Jan 26

7:10 pm - 10:00 pmIAH Houston George Bush Intcntl-OPO Porto

20h 50m1 stop Paris Charles de Gaulle

5:00 am - 1:05 pmOPO Porto-IAH Houston George Bush Intcntl

14h 05m1 stop Amsterdam Schiphol

$759KLM

Thu, Nov 12 - Tue, Nov 17

3:50 pm - 12:05 pmIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

14h 15m1 stop London Heathrow

11:05 am - 9:28 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

16h 23m1 stop Philadelphia

$766British Airways

Fri, Dec 4 - Wed, Dec 9

Cheap last minute flights

Enter your travel dates to find the best prices.

9:15 pm - 3:35 pmIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

36h 20m1 stop Istanbul

5:55 am - 7:20 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

19h 25m1 stop Istanbul

$868Turkish Airlines

Tue, Aug 11 - Thu, Aug 27

9:15 pm - 3:35 pmIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

36h 20m1 stop Istanbul

5:55 am - 12:45 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

36h 50m1 stop Istanbul

$886Turkish Airlines

Tue, Aug 11 - Thu, Aug 27

10:00 am - 7:00 amIAH Houston George Bush Intcntl-OPO Porto

15h 00m1 stop Montreal Pierre Elliott Trudeau Intl

12:05 pm - 1:35 pmOPO Porto-IAH Houston George Bush Intcntl

31h 30m1 stop Frankfurt am Main

$928Multiple Airlines

Tue, Aug 11 - Tue, Aug 18

10:00 am - 7:00 amIAH Houston George Bush Intcntl-OPO Porto

15h 00m1 stop Montreal Pierre Elliott Trudeau Intl

11:20 am - 1:18 pmOPO Porto-IAH Houston George Bush Intcntl

31h 58m2 stops Montreal Pierre Elliott Trudeau Intl Washington, D.C. Reagan-National

$963United Airlines

Wed, Aug 12 - Wed, Aug 26

2:50 pm - 9:45 amIAH Houston George Bush Intcntl-OPO Porto

12h 55m1 stop Newark

11:20 am - 11:46 amOPO Porto-IAH Houston George Bush Intcntl

30h 26m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$964United Airlines

Wed, Aug 12 - Wed, Aug 26

10:00 am - 12:05 pmIAH Houston George Bush Intcntl-OPO Porto

20h 05m2 stops Montreal Pierre Elliott Trudeau Intl Brussels Bruxelles-National

4:35 pm - 1:35 pmOPO Porto-IAH Houston George Bush Intcntl

27h 00m1 stop Frankfurt am Main

$973Multiple Airlines

Tue, Aug 11 - Tue, Aug 18

1:13 pm - 3:25 pmHOU Houston Hobby-OPO Porto

20h 12m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

5:00 am - 10:05 pmOPO Porto-HOU Houston Hobby

23h 05m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

$981Delta

Wed, Aug 12 - Wed, Aug 26

3:55 pm - 5:50 pmIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

19h 55m1 stop Paris Charles de Gaulle

5:00 am - 1:20 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

14h 20m1 stop Amsterdam Schiphol

$1,062Delta

Wed, Aug 12 - Thu, Aug 20

9:05 pm - 5:55 pmIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

14h 50m1 stop London Heathrow

7:20 am - 7:20 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

18h 00m1 stop London Heathrow

$1,079British Airways

Wed, Aug 12 - Thu, Aug 20

9:05 pm - 5:55 pmIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

14h 50m1 stop London Heathrow

7:20 am - 7:20 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

18h 00m1 stop London Heathrow

$1,085British Airways

Wed, Aug 12 - Thu, Aug 20

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Air Canada flights from Houston to Portugal

Our best Air Canada deals on Houston to Portugal flight tickets

Air Canada

Oct 31

IAH6:20 pmHouston George Bush Intcntl

34h 00m

1 stop

LIS9:20 amLisbon Humberto Delgado

Nov 13

LIS11:20 amLisbon Humberto Delgado

16h 19m

1 stop

IAH9:39 pmHouston George Bush Intcntl

$743

Air Canada

Nov 14

IAH11:50 amHouston George Bush Intcntl

39h 30m

2 stops

LIS9:20 amLisbon Humberto Delgado

Nov 24

LIS12:50 pmLisbon Humberto Delgado

14h 49m

1 stop

IAH9:39 pmHouston George Bush Intcntl

$747

Air Canada

Oct 12

IAH6:16 pmHouston George Bush Intcntl

33h 04m

2 stops

LIS9:20 amLisbon Humberto Delgado

Oct 21

LIS11:25 amLisbon Humberto Delgado

14h 27m

1 stop

IAH7:52 pmHouston George Bush Intcntl

$776

American Airlines flights from Houston to Portugal

Our best American Airlines deals on Houston to Portugal flight tickets

American Airlines

Nov 10

HOU9:57 amHouston Hobby

17h 08m

2 stops

LIS9:05 amLisbon Humberto Delgado

Nov 18

LIS11:05 amLisbon Humberto Delgado

18h 08m

2 stops

HOU11:13 pmHouston Hobby

$751

American Airlines

Feb 5

HOU12:47 pmHouston Hobby

14h 18m

2 stops

LIS9:05 amLisbon Humberto Delgado

Feb 20

LIS8:20 amLisbon Humberto Delgado

17h 34m

2 stops

HOU7:54 pmHouston Hobby

$844

American Airlines

Jan 30

HOU10:35 amHouston Hobby

16h 30m

2 stops

LIS9:05 amLisbon Humberto Delgado

Feb 14

LIS11:05 amLisbon Humberto Delgado

18h 50m

2 stops

HOU11:55 pmHouston Hobby

$851

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

HoustonLisbon

IAH Houston George Bush Intcntl - LIS Lisbon Humberto Delgado

IAHLIS

Houston George Bush Intcntl

Wed 11/11

11:50 am-6:55 am

1 stop13h 05m

Lisbon Humberto Delgado

Wed 11/18

5:00 am-2:00 pm

1 stop15h 00m

$698

HoustonLisbon

IAH Houston George Bush Intcntl - LIS Lisbon Humberto Delgado

IAHLIS

Houston George Bush Intcntl

Mon 11/16

11:50 am-10:40 am

1 stop16h 50m

Lisbon Humberto Delgado

Wed 11/25

5:00 am-2:00 pm

1 stop15h 00m

$701

HoustonPorto

IAH Houston George Bush Intcntl - OPO Porto

IAHOPO

Houston George Bush Intcntl

Mon 12/7

11:00 am-9:30 am

1 stop16h 30m

Porto

Fri 12/11

6:00 am-6:15 pm

1 stop18h 15m

$707

HoustonPorto

IAH Houston George Bush Intcntl - OPO Porto

IAHOPO

Houston George Bush Intcntl

Sun 11/8

7:10 pm-10:00 pm

1 stop20h 50m

Porto

Fri 11/13

5:00 am-1:05 pm

1 stop14h 05m

$709

HoustonPorto

IAH Houston George Bush Intcntl - OPO Porto

IAHOPO

Houston George Bush Intcntl

Sun 11/8

4:10 pm-11:45 am

1 stop13h 35m

Porto

Fri 11/13

6:00 am-7:10 pm

2 stops19h 10m

$710

HoustonPorto

IAH Houston George Bush Intcntl - OPO Porto

IAHOPO

Houston George Bush Intcntl

Mon 12/7

9:45 am-9:30 am

2 stops17h 45m

Porto

Fri 12/11

6:00 am-6:15 pm

1 stop18h 15m

$711

HoustonLisbon

IAH Houston George Bush Intcntl - LIS Lisbon Humberto Delgado

IAHLIS

Houston George Bush Intcntl

Wed 11/11

4:10 pm-2:50 pm

1 stop16h 40m

Lisbon Humberto Delgado

Wed 11/18

5:00 am-2:00 pm

1 stop15h 00m

$716

HoustonLisbon

IAH Houston George Bush Intcntl - LIS Lisbon Humberto Delgado

IAHLIS

Houston George Bush Intcntl

Tue 1/19

9:40 pm-5:40 pm

1 stop14h 00m

Lisbon Humberto Delgado

Tue 1/26

11:05 am-10:30 pm

1 stop17h 25m

$717

HoustonPorto

IAH Houston George Bush Intcntl - OPO Porto

IAHOPO

Houston George Bush Intcntl

Thu 11/12

7:10 pm-10:00 pm

1 stop20h 50m

Porto

Tue 11/17

5:00 am-1:05 pm

1 stop14h 05m

$759

HoustonLisbon

IAH Houston George Bush Intcntl - LIS Lisbon Humberto Delgado

IAHLIS

Houston George Bush Intcntl

Fri 12/4

3:50 pm-12:05 pm

1 stop14h 15m

Lisbon Humberto Delgado

Wed 12/9

11:05 am-9:28 pm

1 stop16h 23m

$766

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 January. Flight prices, which tend to average around $682, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of January, then book flights to Portugal from Houston during February instead. Flights to Portugal in February, while not as cheap as those in January, still average around $707.

How far in advance should I book a flight from Houston 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 $929 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 $636 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

Fastest flight time	11h 31m
Direct flights	None

The fastest flight from Houston to Portugal takes 11h 31m

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

Search flight deals

Frequently asked questions about flying from Houston to Portugal

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 8 operators available for flights from Houston to Portugal as of August 2026.
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
KLM	PriceFrom $476	Free Cancellation	Rating 7.8 1,555 reviews	Search KLM flights
Air France	PriceFrom $512	Free Cancellation	Rating 7.5 1,640 reviews	Search Air France flights
Lufthansa	PriceFrom $529	Free Cancellation	Rating 6.8 8,176 reviews	Search Lufthansa flights
Delta	PriceFrom $534	Free Cancellation	Rating 7.8 8,505 reviews	Search Delta flights
British Airways	PriceFrom $559	Free Cancellation	Rating 6.7 8,154 reviews	Search British Airways flights
United Airlines	PriceFrom $575	Free Cancellation	Rating 7.4 10,101 reviews	Search United Airlines flights
Turkish Airlines	PriceFrom $621	Free Cancellation	Rating 7.4 4,480 reviews	Search Turkish Airlines flights
Air Canada	PriceFrom $704	Free Cancellation	Rating 7.1 11,462 reviews	Search Air Canada 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.

An easier way to manage your Portugal trip

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Popular cities

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Feeling lucky

Popular cities in Portugal

Flights to Lisbonfrom $552

Flights to Portofrom $514

Flights to Funchalfrom $605

Flights to Farofrom $626

Flights to Ponta Delgadafrom $575

Flights to Lajesfrom $605

Flights to Hortafrom $670

Flights to Pico Islandfrom $668

Flights to Porto Santofrom $713

Flights to Velasfrom $690

Cheap flights from Houston to Portugal from $284

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Houston to Portugal departing on 10/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Air Canada flights from Houston to Portugal

Our best Air Canada deals on Houston to Portugal flight tickets

American Airlines flights from Houston to Portugal

Our best American Airlines deals on Houston to Portugal flight tickets

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See travel insights to Portugal from

How to get the cheapest flight ticket from Houston to Portugal

What is the cheapest month to fly to Portugal?

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

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

What airlines fly to Portugal?

Cheap Houston to Portugal flight deals and tips

Fastest flight time

Direct flights

Frequently asked questions about flying from Houston to Portugal

Best airlines flying from Houston to Portugal

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

Why use momondo?

An easier way to manage your Portugal trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Portugal

Popular cities in Portugal

Popular flights according to clicks in the last 7 days on momondo

Portugal flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Portugal

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Portugal

List of cabin classes available on flights landing in Portugal. Availability may vary depending on flight origin and airline.

Complete your trip to Portugal

Explore popular destinations other users love

According to popular flight searches on momondo this year