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Cheap flights from Houston George Bush Intcntl Airport to Portugal from $310

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 George Bush Intcntl Airport to Portugal departing on 11/12. 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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Find the cheapest flights from Houston George Bush Intcntl Airport to Portugal

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
12:10 pm - 9:20 amIAH-LIS
15h 10m1 stop
United Airlines Logo
5:00 am - 6:15 pmLIS-IAH
19h 15m1 stop
$526United Airlines
Find Deal
Tue, Feb 24 - Tue, Mar 3
United Airlines Logo
12:10 pm - 9:20 amIAH-LIS
15h 10m1 stop
United Airlines Logo
10:55 am - 6:55 pmLIS-IAH
38h 00m2 stops
$527United Airlines
Find Deal
Tue, Dec 2 - Thu, Dec 11
United Airlines Logo
12:10 pm - 9:20 amIAH-LIS
15h 10m1 stop
United Airlines Logo
6:10 am - 4:10 pmLIS-IAH
16h 00m1 stop
$528United Airlines
Find Deal
Tue, Dec 2 - Thu, Dec 11
Air Canada Logo
12:10 pm - 9:20 amIAH-LIS
15h 10m1 stop
Air Canada Logo
5:00 am - 11:09 amLIS-IAH
36h 09m2 stops
$533Air Canada
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Tue, Dec 2 - Wed, Dec 10
Delta Logo
4:05 pm - 5:30 pmIAH-LIS
19h 25m1 stop
Delta Logo
11:25 am - 1:30 pmLIS-IAH
32h 05m1 stop
$534Delta
Find Deal
Mon, Dec 1 - Tue, Dec 9
Delta Logo
6:40 pm - 5:30 pmIAH-LIS
16h 50m2 stops
Delta Logo
11:25 am - 1:30 pmLIS-IAH
32h 05m1 stop
$539Delta
Find Deal
Mon, Dec 1 - Thu, Dec 11
Air Canada Logo
12:10 pm - 9:20 amIAH-LIS
15h 10m1 stop
Air Canada Logo
11:20 am - 9:39 pmLIS-IAH
40h 19m2 stops
$547Air Canada
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Thu, Dec 4 - Fri, Dec 12
British Airways Logo
1:15 pm - 9:05 amIAH-LIS
13h 50m1 stop
British Airways Logo
3:50 pm - 2:05 pmLIS-IAH
28h 15m1 stop
$584British Airways
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Tue, Dec 2 - Mon, Jan 19
Turkish Airlines Logo
9:05 pm - 9:55 amIAH-OPO
30h 50m1 stop
Turkish Airlines Logo
4:30 pm - 8:10 pmOPO-IAH
32h 40m1 stop
$643Turkish Airlines
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Fri, Feb 27 - Sun, Mar 15
Turkish Airlines Logo
10:05 pm - 3:30 pmIAH-OPO
36h 25m1 stop
Turkish Airlines Logo
10:50 am - 8:10 pmOPO-IAH
38h 20m1 stop
$678Turkish Airlines
Find Deal
Fri, Mar 20 - Tue, Mar 24

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 2
IAH12:10 pmHouston George Bush Intcntl
15h 10m
1 stop
LIS9:20 amLisbon Humberto Delgado
Dec 10
LIS5:00 amLisbon Humberto Delgado
36h 09m
2 stops
IAH11:09 amHouston George Bush Intcntl
$533
Find similar
Air Canada
Dec 4
IAH12:10 pmHouston George Bush Intcntl
15h 10m
1 stop
LIS9:20 amLisbon Humberto Delgado
Dec 12
LIS11:20 amLisbon Humberto Delgado
40h 19m
2 stops
IAH9:39 pmHouston George Bush Intcntl
$547
Find similar
Air Canada
Dec 2
IAH7:10 amHouston George Bush Intcntl
20h 10m
2 stops
LIS9:20 amLisbon Humberto Delgado
Dec 11
LIS10:55 amLisbon Humberto Delgado
16h 49m
2 stops
IAH9:44 pmHouston George Bush Intcntl
$553
Find similar

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
Dec 1
IAH4:05 pmHouston George Bush Intcntl
19h 25m
1 stop
LIS5:30 pmLisbon Humberto Delgado
Dec 9
LIS11:25 amLisbon Humberto Delgado
32h 05m
1 stop
IAH1:30 pmHouston George Bush Intcntl
$534
Find similar
Delta
Dec 1
IAH6:40 pmHouston George Bush Intcntl
16h 50m
2 stops
LIS5:30 pmLisbon Humberto Delgado
Dec 11
LIS11:25 amLisbon Humberto Delgado
32h 05m
1 stop
IAH1:30 pmHouston George Bush Intcntl
$539
Find similar
Delta
Dec 4
IAH4:05 pmHouston George Bush Intcntl
13h 15m
1 stop
LIS11:20 amLisbon Humberto Delgado
Dec 12
LIS5:00 amLisbon Humberto Delgado
19h 19m
2 stops
IAH6:19 pmHouston George Bush Intcntl
$544
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Houston George Bush Intcntl Airport 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, momondo users made 832,500 searches. Data last updated November 6, 2025.
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

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Tue 2/24

12:10 pm-9:20 am

1 stop15h 10m

Lisbon Humberto Delgado

Tue 3/3

5:00 am-6:15 pm

1 stop19h 15m

$526

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Tue 12/2

12:10 pm-9:20 am

1 stop15h 10m

Lisbon Humberto Delgado

Thu 12/11

10:55 am-6:55 pm

2 stops38h 00m

$527

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Tue 12/2

12:10 pm-9:20 am

1 stop15h 10m

Lisbon Humberto Delgado

Thu 12/11

6:10 am-4:10 pm

1 stop16h 00m

$528

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Tue 12/2

12:10 pm-9:20 am

1 stop15h 10m

Lisbon Humberto Delgado

Wed 12/10

5:00 am-11:09 am

2 stops36h 09m

$533

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Mon 12/1

4:05 pm-5:30 pm

1 stop19h 25m

Lisbon Humberto Delgado

Tue 12/9

11:25 am-1:30 pm

1 stop32h 05m

$534

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Mon 12/1

6:40 pm-5:30 pm

2 stops16h 50m

Lisbon Humberto Delgado

Thu 12/11

11:25 am-1:30 pm

1 stop32h 05m

$539

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Thu 12/4

12:10 pm-9:20 am

1 stop15h 10m

Lisbon Humberto Delgado

Fri 12/12

11:20 am-9:39 pm

2 stops40h 19m

$547

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Tue 12/2

1:15 pm-9:05 am

1 stop13h 50m

Lisbon Humberto Delgado

Mon 1/19

3:50 pm-2:05 pm

1 stop28h 15m

$584

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Fri 2/27

9:05 pm-9:55 am

1 stop30h 50m

Porto

Sun 3/15

4:30 pm-8:10 pm

1 stop32h 40m

$643

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Fri 3/20

10:05 pm-3:30 pm

1 stop36h 25m

Porto

Tue 3/24

10:50 am-8:10 pm

1 stop38h 20m

$678

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Portugal from

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

What is the cheapest month to fly to Portugal?

The cheapest month to fly to Portugal from Houston George Bush Intcntl Airport is in February. Flight prices, which tend to average around $588, 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 George Bush Intcntl Airport during January instead. Flights to Portugal in January, while not as cheap as those in February, still average around $621.

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

According to our data, Tuesday is the cheapest day to fly to Portugal from Houston George Bush Intcntl Airport. The lowest ticket price found for a Tuesday departure recently was $877. 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 Friday, 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 George Bush Intcntl Airport to Portugal during this time can be as low as $963. At noon is when there is more demand to fly to Portugal, so prices are often more expensive at around $1,106 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 George Bush Intcntl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around $826 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 $748 on momondo.

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

You could potentially save up to 37% 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

Direct flights

None
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.
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  • 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?

  • 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
KLMPriceFrom $536Free CancellationRating
7.7
1,405 reviews
Search KLM flights
Air FrancePriceFrom $549Free CancellationRating
7.4
1,484 reviews
Search Air France flights
Air CanadaPriceFrom $563Free CancellationRating
7.1
10,412 reviews
Search Air Canada flights
United AirlinesPriceFrom $570Free CancellationRating
7.4
9,003 reviews
Search United Airlines flights
American AirlinesPriceFrom $578Free CancellationRating
7.2
11,040 reviews
Search American Airlines flights
British AirwaysPriceFrom $601Free CancellationRating
6.7
7,499 reviews
Search British Airways flights
Turkish AirlinesPriceFrom $628Free CancellationRating
7.3
4,031 reviews
Search Turkish Airlines flights
DeltaPriceFrom $643Free CancellationRating
7.9
8,001 reviews
Search Delta flights
LufthansaPriceFrom $679Free CancellationRating
6.8
7,555 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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