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

Air Canada, United Airlines, and Aer Lingus are the most popular carriers operating from Houston George Bush Intcntl to Portugal

What airlines fly to Portugal?

United Airlines, KLM 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 58% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 7 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 October 2026, there are 7 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.

$325 Cheap Flights from Houston George Bush Intcntl Airport to Portugal in 2026/27

Discover deals from 900+ travel sites with momondo.

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

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:55 am - 12:05 pmIAH Houston George Bush Intcntl-OPO Porto

18h 10m2 stops Montreal Pierre Elliott Trudeau Intl Brussels Bruxelles-National

7:20 pm - 9:26 pmOPO Porto-IAH Houston George Bush Intcntl

31h 06m2 stops Zurich Montreal Pierre Elliott Trudeau Intl

$689Multiple Airlines

Mon, Mar 8 - Mon, Mar 15

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

$696Multiple Airlines

Mon, Dec 7 - Tue, Dec 22

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

20h 50m1 stop Paris Charles de Gaulle

4:10 pm - 2:05 pmOPO Porto-IAH Houston George Bush Intcntl

26h 55m1 stop Amsterdam Schiphol

$702KLM

Mon, Mar 8 - Mon, Mar 15

5:05 pm - 3:25 pmIAH Houston George Bush Intcntl-OPO Porto

16h 20m1 stop Paris Charles de Gaulle

5:00 am - 1:15 pmOPO Porto-IAH Houston George Bush Intcntl

14h 15m1 stop Amsterdam Schiphol

$702KLM

Tue, Apr 13 - Fri, Apr 23

5:05 pm - 3:25 pmIAH Houston George Bush Intcntl-OPO Porto

16h 20m1 stop Paris Charles de Gaulle

5:00 am - 1:15 pmOPO Porto-IAH Houston George Bush Intcntl

14h 15m1 stop Amsterdam Schiphol

$702Delta

Tue, Apr 13 - Fri, Apr 23

6:00 am - 9:45 amIAH Houston George Bush Intcntl-OPO Porto

21h 45m1 stop Newark

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

18h 00m1 stop Frankfurt am Main

$706United Airlines

Sun, Apr 11 - Fri, Apr 30

6:00 am - 9:45 amIAH Houston George Bush Intcntl-OPO Porto

21h 45m1 stop Newark

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

18h 00m1 stop Frankfurt am Main

$706United Airlines

Sun, Apr 11 - Wed, Apr 28

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

16h 50m1 stop Montreal Pierre Elliott Trudeau Intl

11:20 am - 10:53 amLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

29h 33m1 stop Toronto Pearson Intl

$713Air Canada

Mon, Dec 7 - Wed, Dec 23

4:10 pm - 3:00 pmIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

16h 50m1 stop Frankfurt am Main

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

15h 00m1 stop Frankfurt am Main

$724Lufthansa

Sun, Jan 17 - Fri, Jan 29

11:50 am - 9:20 amIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

15h 30m2 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl

5:00 am - 9:07 amLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

34h 07m2 stops Frankfurt am Main Toronto Pearson Intl

$728Air Canada

Tue, Dec 1 - Tue, Dec 8

Cheap last minute flights

Enter your travel dates to find the best prices.

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

$795KLM

Wed, Oct 28 - Thu, Nov 5

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

$795Delta

Wed, Oct 28 - Thu, Nov 5

2:22 pm - 10:35 amIAH Houston George Bush Intcntl-OPO Porto

15h 13m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

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

14h 10m1 stop Amsterdam Schiphol

$800Delta

Wed, Oct 28 - Thu, Nov 5

2:22 pm - 10:35 amIAH Houston George Bush Intcntl-OPO Porto

15h 13m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

4:10 pm - 1:05 pmOPO Porto-IAH Houston George Bush Intcntl

26h 55m1 stop Amsterdam Schiphol

$800Multiple Airlines

Wed, Oct 28 - Thu, Nov 5

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

$805KLM

Wed, Oct 28 - Thu, Nov 5

12:07 pm - 9:30 amIAH Houston George Bush Intcntl-OPO Porto

16h 23m2 stops Washington, D.C. Reagan-National Newark

6:00 am - 9:27 pmOPO Porto-IAH Houston George Bush Intcntl

21h 27m2 stops Frankfurt am Main Newark

$808United Airlines

Wed, Oct 28 - Thu, Nov 5

2:22 pm - 10:35 amIAH Houston George Bush Intcntl-OPO Porto

15h 13m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

11:15 am - 11:55 pmOPO Porto-IAH Houston George Bush Intcntl

18h 40m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

$810Multiple Airlines

Wed, Oct 28 - Thu, Nov 5

8:10 pm - 10:25 pmIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

21h 15m1 stop Paris Charles de Gaulle

11:15 am - 11:55 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

18h 40m2 stops Boston Logan Intl Atlanta Hartsfield-Jackson

$888Air France

Tue, Oct 27 - Mon, Nov 2

4:45 pm - 10:05 amIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

12h 20m1 stop Washington, D.C. Dulles Intl

10:15 am - 8:21 pmLIS Lisbon Humberto Delgado-IAH Houston George Bush Intcntl

16h 06m1 stop Newark

$961United Airlines

Tue, Oct 27 - Mon, Nov 2

5:10 pm - 10:50 pmIAH Houston George Bush Intcntl-LIS Lisbon Humberto Delgado

24h 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

$5,454Lufthansa

Tue, Oct 27 - Fri, Nov 6

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Air Canada flights from Houston George Bush Intcntl Airport to Portugal

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

Air Canada

Dec 7

IAH11:55 amHouston George Bush Intcntl

16h 45m

2 stops

LIS10:40 amLisbon Humberto Delgado

Dec 23

LIS11:20 amLisbon Humberto Delgado

29h 33m

1 stop

IAH10:53 amHouston George Bush Intcntl

$731

Air Canada

Dec 7

IAH11:50 amHouston George Bush Intcntl

16h 50m

1 stop

LIS10:40 amLisbon Humberto Delgado

Dec 23

LIS11:20 amLisbon Humberto Delgado

40h 14m

2 stops

IAH9:34 pmHouston George Bush Intcntl

$747

Air Canada

Jan 17

IAH11:55 amHouston George Bush Intcntl

15h 25m

2 stops

LIS9:20 amLisbon Humberto Delgado

Jan 29

LIS11:20 amLisbon Humberto Delgado

16h 14m

1 stop

IAH9:34 pmHouston George Bush Intcntl

$750

Lufthansa flights from Houston George Bush Intcntl Airport to Portugal

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

Lufthansa

Mar 8

IAH4:10 pmHouston George Bush Intcntl

17h 20m

1 stop

OPO3:30 pmPorto

Mar 15

OPO4:10 pmPorto

27h 50m

1 stop

IAH3:00 pmHouston George Bush Intcntl

$722

Lufthansa

Jan 17

IAH4:10 pmHouston George Bush Intcntl

16h 50m

1 stop

LIS3:00 pmLisbon Humberto Delgado

Jan 29

LIS5:00 amLisbon Humberto Delgado

15h 00m

1 stop

IAH2:00 pmHouston George Bush Intcntl

$724

Lufthansa

Mar 8

IAH4:10 pmHouston George Bush Intcntl

17h 20m

1 stop

OPO3:30 pmPorto

Mar 15

OPO12:30 pmPorto

31h 30m

1 stop

IAH3:00 pmHouston George Bush Intcntl

$749

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

HoustonPorto

IAH Houston George Bush Intcntl - OPO Porto

IAHOPO

Houston George Bush Intcntl

Mon 3/8

11:55 am-12:05 pm

2 stops18h 10m

Porto

Mon 3/15

7:20 pm-9:26 pm

2 stops31h 06m

$689

HoustonLisbon

IAH Houston George Bush Intcntl - LIS Lisbon Humberto Delgado

IAHLIS

Houston George Bush Intcntl

Mon 12/7

11:50 am-10:40 am

1 stop16h 50m

Lisbon Humberto Delgado

Tue 12/22

5:00 am-2:00 pm

1 stop15h 00m

$696

HoustonPorto

IAH Houston George Bush Intcntl - OPO Porto

IAHOPO

Houston George Bush Intcntl

Mon 3/8

7:10 pm-10:00 pm

1 stop20h 50m

Porto

Mon 3/15

4:10 pm-2:05 pm

1 stop26h 55m

$702

Quickest round-trip

HoustonPorto

IAH Houston George Bush Intcntl - OPO Porto

IAHOPO

Houston George Bush Intcntl

Tue 4/13

5:05 pm-3:25 pm

1 stop16h 20m

Porto

Fri 4/23

5:00 am-1:15 pm

1 stop14h 15m

$702

HoustonPorto

IAH Houston George Bush Intcntl - OPO Porto

IAHOPO

Houston George Bush Intcntl

Tue 4/13

5:05 pm-3:25 pm

1 stop16h 20m

Porto

Fri 4/23

5:00 am-1:15 pm

1 stop14h 15m

$702

HoustonPorto

IAH Houston George Bush Intcntl - OPO Porto

IAHOPO

Houston George Bush Intcntl

Sun 4/11

6:00 am-9:45 am

1 stop21h 45m

Porto

Fri 4/30

6:00 am-6:00 pm

1 stop18h 00m

$706

HoustonPorto

IAH Houston George Bush Intcntl - OPO Porto

IAHOPO

Houston George Bush Intcntl

Sun 4/11

6:00 am-9:45 am

1 stop21h 45m

Porto

Wed 4/28

6:00 am-6:00 pm

1 stop18h 00m

$706

HoustonLisbon

IAH Houston George Bush Intcntl - LIS Lisbon Humberto Delgado

IAHLIS

Houston George Bush Intcntl

Mon 12/7

11:50 am-10:40 am

1 stop16h 50m

Lisbon Humberto Delgado

Wed 12/23

11:20 am-10:53 am

1 stop29h 33m

$713

HoustonLisbon

IAH Houston George Bush Intcntl - LIS Lisbon Humberto Delgado

IAHLIS

Houston George Bush Intcntl

Sun 1/17

4:10 pm-3:00 pm

1 stop16h 50m

Lisbon Humberto Delgado

Fri 1/29

5:00 am-2:00 pm

1 stop15h 00m

$724

HoustonLisbon

IAH Houston George Bush Intcntl - LIS Lisbon Humberto Delgado

IAHLIS

Houston George Bush Intcntl

Tue 12/1

11:50 am-9:20 am

2 stops15h 30m

Lisbon Humberto Delgado

Tue 12/8

5:00 am-9:07 am

2 stops34h 07m

$728

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 $740, 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 $753.

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 $978 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 $750 on momondo.

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

You could potentially save up to 7% 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	$325
Fastest flight time	11h 50m
Direct flights	None

The best one-way flight to Portugal from Houston George Bush Intcntl Airport in the past 72 hours is $325. The best round-trip flight deal from Houston George Bush Intcntl Airport to Portugal found on momondo in the last 72 hours is $689.

The fastest flight from Houston George Bush Intcntl Airport to Portugal takes 11h 50m

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 October 2026, there are 7 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 1,594 reviews	Search KLM flights
Air France	PriceFrom $512	Free Cancellation	Rating 7.5 1,654 reviews	Search Air France flights
Delta	PriceFrom $541	Free Cancellation	Rating 7.8 8,678 reviews	Search Delta flights
British Airways	PriceFrom $559	Free Cancellation	Rating 6.7 8,270 reviews	Search British Airways flights
United Airlines	PriceFrom $610	Free Cancellation	Rating 7.3 10,432 reviews	Search United Airlines flights
Lufthansa	PriceFrom $719	Free Cancellation	Rating 6.8 8,295 reviews	Search Lufthansa flights
Air Canada	PriceFrom $730	Free Cancellation	Rating 7.1 11,805 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?

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 $451

Flights to Portofrom $400

Flights to Funchalfrom $405

Flights to Farofrom $569

Flights to Ponta Delgadafrom $549

Flights to Lajesfrom $546

Flights to Hortafrom $561

Flights to Pico Islandfrom $676

Flights to Porto Santofrom $945

Flights to Velasfrom $558

Cheap flights from Houston George Bush Intcntl Airport to Portugal from $325

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

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Air Canada flights from Houston George Bush Intcntl Airport to Portugal

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

Lufthansa flights from Houston George Bush Intcntl Airport to Portugal

Our best Lufthansa 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