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

United Airlines, British Airways, and Delta are the most popular carriers operating from Houston George Bush Intcntl to Portugal

What airlines fly to Portugal?

United Airlines, Delta and British Airways are the top three most popular airlines that fly to Portugal from Houston George Bush Intcntl Airport according to our data. United Airlines is the first choice among our users, with 60% 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.

How many operators does momondo search for flights from Houston George Bush Intcntl Airport to Portugal?

As of September 2026, there are 8 operators available to choose from for flights from Houston George Bush Intcntl Airport to Portugal.

How old do you have to be to fly from Houston George Bush Intcntl Airport to Portugal?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Houston George Bush Intcntl Airport to Portugal.

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

The required travel and health documents for your Portugal trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Portugal. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$265 Cheap Flights from Houston George Bush Intcntl Airport to Portugal in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Houston George Bush Intcntl Airport to Portugal

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

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

$699Multiple Airlines

Mon, Nov 9 - Wed, Nov 18

11:50 am - 11:15 amIAH Houston George Bush Intcntl-OPO Porto

41h 25m2 stops Montreal Pierre Elliott Trudeau Intl Zurich

12:35 pm - 12:22 amOPO Porto-IAH Houston George Bush Intcntl

17h 47m2 stops Frankfurt am Main Chicago O'Hare Intl

$703Multiple Airlines

Mon, Dec 7 - Fri, Dec 11

12:23 pm - 9:30 amIAH Houston George Bush Intcntl-OPO Porto

15h 07m1 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

Mon, Dec 7 - Fri, Dec 11

8:25 am - 9:30 amIAH Houston George Bush Intcntl-OPO Porto

19h 05m2 stops Chicago O'Hare Intl Newark

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

18h 15m1 stop Frankfurt am Main

$712United Airlines

Mon, Dec 7 - Fri, Dec 11

8:10 pm - 10:00 pmIAH Houston George Bush Intcntl-OPO Porto

20h 50m1 stop Paris Charles de Gaulle

5:00 am - 1:10 pmOPO Porto-IAH Houston George Bush Intcntl

14h 10m1 stop Amsterdam Schiphol

$718KLM

Wed, Oct 28 - Thu, Nov 5

3:30 pm - 6:35 pmIAH Houston George Bush Intcntl-FNC Funchal Madeira

21h 05m1 stop London Heathrow

4:25 pm - 2:05 pmFNC Funchal Madeira-IAH Houston George Bush Intcntl

27h 40m1 stop London Gatwick

$782British Airways

Mon, Oct 19 - Tue, Nov 3

3:30 pm - 6:05 pmIAH Houston George Bush Intcntl-FNC Funchal Madeira

20h 35m1 stop London Heathrow

12:30 pm - 7:55 pmFNC Funchal Madeira-IAH Houston George Bush Intcntl

37h 25m1 stop London Gatwick

$783British Airways

Sun, Oct 18 - Mon, Nov 2

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

13h 00m1 stop Montreal Pierre Elliott Trudeau Intl

5:00 am - 5:03 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

18h 03m2 stops Frankfurt am Main Toronto Pearson Intl

$808Air Canada

Sun, Feb 28 - Sat, Mar 13

11:55 am - 9:20 amIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

15h 25m2 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl

5:00 am - 5:03 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

18h 03m2 stops Frankfurt am Main Toronto Pearson Intl

$816Air Canada

Sun, Feb 28 - Sat, Mar 13

Cheap last minute flights

Enter your travel dates to find the best prices.

2:50 pm - 11:05 amIAH Houston George Bush Intcntl-OPO Porto

14h 15m1 stop Newark

11:00 am - 12:18 pmOPO Porto-IAH Houston George Bush Intcntl

30h 18m2 stops Lisbon Humberto Delgado New York John F Kennedy Intl

$1,137TAP AIR PORTUGAL

Sat, Sep 12 - Sat, Oct 31

11:48 am - 8:25 pmIAH Houston George Bush Intcntl-OPO Porto

26h 37m2 stops New York John F Kennedy Intl Lisbon Humberto Delgado

11:00 am - 12:18 pmOPO Porto-IAH Houston George Bush Intcntl

30h 18m2 stops Lisbon Humberto Delgado New York John F Kennedy Intl

$1,142TAP AIR PORTUGAL

Sat, Sep 12 - Sat, Oct 31

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

14h 50m1 stop London Heathrow

7:20 am - 7:15 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

17h 55m1 stop London Heathrow

$1,231British Airways

Tue, Sep 8 - Wed, Sep 23

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

14h 50m1 stop London Heathrow

7:20 am - 7:15 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

17h 55m1 stop London Heathrow

$1,256British Airways

Mon, Sep 7 - Wed, Sep 23

3:55 pm - 2:55 pmIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

17h 00m1 stop Paris Charles de Gaulle

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

14h 20m1 stop Amsterdam Schiphol

$1,280Delta

Fri, Sep 11 - Thu, Sep 17

3:55 pm - 2:55 pmIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

17h 00m1 stop Paris Charles de Gaulle

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

14h 20m1 stop Amsterdam Schiphol

$1,280Delta

Thu, Sep 10 - Fri, Sep 18

3:55 pm - 2:55 pmIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

17h 00m1 stop Paris Charles de Gaulle

9:50 am - 10:05 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

18h 15m2 stops Paris Charles de Gaulle Detroit Metropolitan Wayne County

$1,357Air France

Fri, Sep 11 - Sat, Sep 19

3:55 pm - 11:15 amIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

13h 20m1 stop Paris Charles de Gaulle

9:50 am - 10:05 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

18h 15m2 stops Paris Charles de Gaulle Detroit Metropolitan Wayne County

$1,357Air France

Thu, Sep 10 - Sat, Sep 19

12:21 pm - 10:55 amIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

16h 34m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol

11:55 am - 11:54 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

17h 59m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

$1,423KLM

Thu, Sep 10 - Fri, Sep 18

12:41 pm - 10:55 amIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

16h 14m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol

11:55 am - 11:54 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

17h 59m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

$1,648KLM

Sat, Sep 12 - Thu, Sep 17

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United Airlines flights from Houston George Bush Intcntl Airport to Portugal

Our best United Airlines deals on Houston George Bush Intcntl Airport to Portugal flight tickets

United Airlines

Dec 7

IAH12:23 pmHouston George Bush Intcntl

15h 07m

1 stop

OPO9:30 amPorto

Dec 11

OPO6:00 amPorto

18h 15m

1 stop

IAH6:15 pmHouston George Bush Intcntl

$707

United Airlines

Dec 7

IAH9:35 amHouston George Bush Intcntl

17h 55m

2 stops

OPO9:30 amPorto

Dec 11

OPO6:00 amPorto

20h 23m

2 stops

IAH8:23 pmHouston George Bush Intcntl

$722

United Airlines

Oct 26

IAH11:50 amHouston George Bush Intcntl

17h 50m

1 stop

LIS10:40 amLisbon Humberto Delgado

Nov 11

LIS5:00 amLisbon Humberto Delgado

15h 00m

1 stop

IAH2:00 pmHouston George Bush Intcntl

$723

Delta flights from Houston George Bush Intcntl Airport to Portugal

Our best Delta deals on Houston George Bush Intcntl Airport to Portugal flight tickets

Delta

Oct 28

IAH2:22 pmHouston George Bush Intcntl

15h 13m

2 stops

OPO10:35 amPorto

Nov 5

OPO5:00 amPorto

14h 10m

1 stop

IAH1:10 pmHouston George Bush Intcntl

$723

Delta

Oct 26

IAH6:20 pmHouston George Bush Intcntl

16h 05m

2 stops

OPO3:25 pmPorto

Nov 11

OPO11:15 amPorto

31h 55m

1 stop

IAH1:10 pmHouston George Bush Intcntl

$725

Delta

Oct 26

IAH2:22 pmHouston George Bush Intcntl

20h 03m

2 stops

OPO3:25 pmPorto

Nov 11

OPO5:00 amPorto

23h 22m

2 stops

IAH10:22 pmHouston George Bush Intcntl

$730

momondo Fare Finder

Use the filters below to find and compare flights from Houston George Bush Intcntl Airport to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HoustonLisbon

IAH Houston George Bush Intcntl - LIS Lisbon Humberto Delgado

IAHLIS

Houston George Bush Intcntl

Mon 11/9

11:50 am-10:40 am

1 stop16h 50m

Lisbon Humberto Delgado

Wed 11/18

5:00 am-2:00 pm

1 stop15h 00m

$699

HoustonPorto

IAH Houston George Bush Intcntl - OPO Porto

IAHOPO

Houston George Bush Intcntl

Mon 12/7

11:50 am-11:15 am

2 stops41h 25m

Porto

Fri 12/11

12:35 pm-12:22 am

2 stops17h 47m

$703

HoustonPorto

IAH Houston George Bush Intcntl - OPO Porto

IAHOPO

Houston George Bush Intcntl

Mon 12/7

12:23 pm-9:30 am

1 stop15h 07m

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

Mon 12/7

7:10 pm-10:00 pm

1 stop20h 50m

Porto

Fri 12/11

5:00 am-1:05 pm

1 stop14h 05m

$709

HoustonPorto

IAH Houston George Bush Intcntl - OPO Porto

IAHOPO

Houston George Bush Intcntl

Mon 12/7

8:25 am-9:30 am

2 stops19h 05m

Porto

Fri 12/11

6:00 am-6:15 pm

1 stop18h 15m

$712

HoustonPorto

IAH Houston George Bush Intcntl - OPO Porto

IAHOPO

Houston George Bush Intcntl

Wed 10/28

8:10 pm-10:00 pm

1 stop20h 50m

Porto

Thu 11/5

5:00 am-1:10 pm

1 stop14h 10m

$718

HoustonFunchal

IAH Houston George Bush Intcntl - FNC Funchal Madeira

IAHFNC

Houston George Bush Intcntl

Mon 10/19

3:30 pm-6:35 pm

1 stop21h 05m

Funchal Madeira

Tue 11/3

4:25 pm-2:05 pm

1 stop27h 40m

$782

HoustonFunchal

IAH Houston George Bush Intcntl - FNC Funchal Madeira

IAHFNC

Houston George Bush Intcntl

Sun 10/18

3:30 pm-6:05 pm

1 stop20h 35m

Funchal Madeira

Mon 11/2

12:30 pm-7:55 pm

1 stop37h 25m

$783

Quickest round-trip

HoustonLisbon

IAH Houston George Bush Intcntl - LIS Lisbon Humberto Delgado

IAHLIS

Houston George Bush Intcntl

Sun 2/28

11:55 am-6:55 am

1 stop13h 00m

Lisbon Humberto Delgado

Sat 3/13

5:00 am-5:03 pm

2 stops18h 03m

$808

HoustonLisbon

IAH Houston George Bush Intcntl - LIS Lisbon Humberto Delgado

IAHLIS

Houston George Bush Intcntl

Sun 2/28

11:55 am-9:20 am

2 stops15h 25m

Lisbon Humberto Delgado

Sat 3/13

5:00 am-5:03 pm

2 stops18h 03m

$816

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 George Bush Intcntl Airport 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 George Bush Intcntl Airport is in April. Flight prices, which tend to average around $733, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of April, then book flights to Portugal from Houston George Bush Intcntl Airport during March instead. Flights to Portugal in March, while not as cheap as those in April, still average around $748.

How far in advance should I book a flight from Houston George Bush Intcntl Airport to Portugal?

You are more likely to see cheaper flights to Portugal from Houston George Bush Intcntl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around $941 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portugal from Houston George Bush Intcntl Airport for as low as $796 on momondo.

Can stopping save me money on Houston George Bush Intcntl Airport to Portugal flights?

You could potentially save up to 9% on your flight if you consider stops on a Houston George Bush Intcntl Airport to Portugal flight.

Cheap Houston George Bush Intcntl Airport to Portugal flight deals and tips

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

Best Price Found	$265
Fastest flight time	11h 45m
Direct flights	None

The best one-way flight to Portugal from Houston George Bush Intcntl Airport in the past 72 hours is $265. The best round-trip flight deal from Houston George Bush Intcntl Airport to Portugal found on momondo in the last 72 hours is $699.

The fastest flight from Houston George Bush Intcntl Airport to Portugal takes 11h 45m

There are no direct flights from Houston George Bush Intcntl Airport to Portugal. There are no popular flight routes from Houston George Bush Intcntl Airport to Portugal.

Search flight deals

Frequently asked questions about flying from Houston George Bush Intcntl Airport to Portugal

When did momondo last update prices for flights from Houston George Bush Intcntl Airport to Portugal?
Prices for flights from Houston George Bush Intcntl Airport to Portugal refresh daily.
How many operators does momondo search for flights from Houston George Bush Intcntl Airport to Portugal?
As of September 2026, there are 8 operators available to choose from for flights from Houston George Bush Intcntl Airport to Portugal.
How old do you have to be to fly from Houston George Bush Intcntl Airport to Portugal?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Houston George Bush Intcntl Airport to Portugal.
What documentation or ID do you need to fly to Portugal?
The required travel and health documents for your Portugal trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Portugal. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Houston George Bush Intcntl Airport to Portugal

Compare and see reviews for airlines that fly from Houston George Bush Intcntl Airport to Portugal with momondo

Airline	Rating	Free Cancellation	Price
KLM	PriceFrom $476	Free Cancellation	Rating 7.8 1,568 reviews	Search KLM flights
Air France	PriceFrom $512	Free Cancellation	Rating 7.5 1,645 reviews	Search Air France flights
Delta	PriceFrom $541	Free Cancellation	Rating 7.8 8,558 reviews	Search Delta flights
Turkish Airlines	PriceFrom $552	Free Cancellation	Rating 7.4 4,480 reviews	Search Turkish Airlines flights
British Airways	PriceFrom $559	Free Cancellation	Rating 6.7 8,209 reviews	Search British Airways flights
United Airlines	PriceFrom $583	Free Cancellation	Rating 7.4 10,172 reviews	Search United Airlines flights
Air Canada	PriceFrom $704	Free Cancellation	Rating 7.1 11,592 reviews	Search Air Canada flights
Lufthansa	PriceFrom $719	Free Cancellation	Rating 6.8 8,222 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?

Yes. All flights to Portugal from Houston on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once all potential Houston to Portugal flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes. momondo can track prices for Houston to Portugal flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Popular cities in Portugal

Flights to Lisbonfrom $509

Flights to Portofrom $539

Flights to Funchalfrom $554

Flights to Farofrom $574

Flights to Ponta Delgadafrom $554

Flights to Lajesfrom $577

Flights to Hortafrom $591

Flights to Pico Islandfrom $561

Flights to Porto Santofrom $942

Flights to Velasfrom $692

Cheap flights from Houston George Bush Intcntl Airport to Portugal from $265

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United Airlines flights from Houston George Bush Intcntl Airport to Portugal

Our best United Airlines deals on Houston George Bush Intcntl Airport to Portugal flight tickets

Delta flights from Houston George Bush Intcntl Airport to Portugal

Our best Delta deals on Houston George Bush Intcntl Airport to Portugal flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Houston George Bush Intcntl Airport to Portugal that are best for you.

See travel insights to Portugal from

How to get the cheapest flight ticket from Houston George Bush Intcntl Airport to Portugal

What is the cheapest month to fly to Portugal?

How far in advance should I book a flight from Houston George Bush Intcntl Airport to Portugal?

Can stopping save me money on Houston George Bush Intcntl Airport to Portugal flights?

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

What airlines fly to Portugal?

Cheap Houston George Bush Intcntl Airport to Portugal flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Houston George Bush Intcntl Airport to Portugal

Best airlines flying from Houston George Bush Intcntl Airport to Portugal

Compare and see reviews for airlines that fly from Houston George Bush Intcntl Airport 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

Houston George Bush Intcntl Airport flight routes

According to popular flight searches on momondo this year

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