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Cheap flights from Houston George Bush Intcntl Airport to Portugal from $277

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 10/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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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.
Multiple Airlines Logo
10:00 am - 9:20 am
IAH
-
LIS
17h 20m
1 stop
Multiple Airlines Logo
5:00 am - 2:00 pm
LIS
-
IAH
15h 00m
1 stop
$709Multiple Airlines
Tue, Oct 13 - Tue, Nov 3
KLM Logo
7:10 pm - 10:00 pm
IAH
-
OPO
20h 50m
1 stop
KLM Logo
5:00 am - 1:05 pm
OPO
-
IAH
14h 05m
1 stop
$713KLM
Tue, Jan 12 - Tue, Jan 19
Multiple Airlines Logo
12:00 pm - 9:20 am
IAH
-
LIS
15h 20m
2 stops
Multiple Airlines Logo
5:00 am - 2:00 pm
LIS
-
IAH
15h 00m
1 stop
$717Multiple Airlines
Tue, Oct 13 - Tue, Nov 3
Delta Logo
11:50 am - 10:35 am
IAH
-
OPO
16h 45m
2 stops
Delta Logo
5:00 am - 1:05 pm
OPO
-
IAH
14h 05m
1 stop
$718Delta
Tue, Jan 12 - Tue, Jan 19
United Airlines Logo
11:50 am - 6:55 am
IAH
-
LIS
13h 05m
1 stop
United Airlines Logo
5:00 am - 6:15 pm
LIS
-
IAH
19h 15m
1 stop
$722United Airlines
Wed, Nov 11 - Thu, Nov 19
United Airlines Logo
7:30 am - 8:10 am
IAH
-
LIS
18h 40m
1 stop
United Airlines Logo
5:00 am - 6:15 pm
LIS
-
IAH
19h 15m
1 stop
$724United Airlines
Tue, Nov 10 - Wed, Nov 18
Delta Logo
11:50 am - 10:35 am
IAH
-
OPO
16h 45m
2 stops
Delta Logo
5:00 am - 6:28 pm
OPO
-
IAH
19h 28m
2 stops
$727Delta
Tue, Jan 12 - Tue, Jan 19
Air Canada Logo
6:10 pm - 6:55 am
IAH
-
LIS
30h 45m
2 stops
Air Canada Logo
5:00 am - 6:27 pm
LIS
-
IAH
19h 27m
2 stops
$730Air Canada
Tue, Nov 10 - Wed, Nov 18
Air Canada Logo
6:10 pm - 6:55 am
IAH
-
LIS
30h 45m
2 stops
Air Canada Logo
5:00 am - 6:27 pm
LIS
-
IAH
19h 27m
2 stops
$735Air Canada
Tue, Nov 10 - Wed, Nov 18
Iberia Logo
10:46 am - 12:55 pm
IAH
-
FNC
44h 09m
2 stops
Iberia Logo
1:20 pm - 9:59 pm
FNC
-
IAH
38h 39m
2 stops
$972Iberia
Mon, Sep 21 - Mon, Sep 28

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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
Nov 17
IAH5:03 pmHouston George Bush Intcntl
24h 27m
2 stops
LIS11:30 pmLisbon Humberto Delgado
Nov 27
LIS5:00 amLisbon Humberto Delgado
15h 00m
1 stop
IAH2:00 pmHouston George Bush Intcntl
$741
Lufthansa
Nov 17
IAH5:03 pmHouston George Bush Intcntl
24h 27m
2 stops
LIS11:30 pmLisbon Humberto Delgado
Nov 26
LIS5:00 amLisbon Humberto Delgado
25h 30m
2 stops
IAH12:30 amHouston George Bush Intcntl
$751
Lufthansa
Nov 16
IAH6:40 pmHouston George Bush Intcntl
22h 10m
2 stops
LIS10:50 pmLisbon Humberto Delgado
Nov 27
LIS12:25 pmLisbon Humberto Delgado
18h 05m
2 stops
IAH12:30 amHouston George Bush Intcntl
$762

KLM flights from Houston George Bush Intcntl Airport to Portugal

Our best KLM deals on Houston George Bush Intcntl Airport to Portugal flight tickets
KLM
Jan 12
IAH7:10 pmHouston George Bush Intcntl
20h 50m
1 stop
OPO10:00 pmPorto
Jan 19
OPO5:00 amPorto
14h 05m
1 stop
IAH1:05 pmHouston George Bush Intcntl
$713
KLM
Nov 11
IAH11:50 amHouston George Bush Intcntl
15h 10m
2 stops
LIS9:00 amLisbon Humberto Delgado
Nov 19
LIS5:00 amLisbon Humberto Delgado
19h 17m
2 stops
IAH6:17 pmHouston George Bush Intcntl
$740
KLM
Oct 21
IAH9:42 amHouston George Bush Intcntl
16h 18m
2 stops
LIS8:00 amLisbon Humberto Delgado
Oct 27
LIS5:00 amLisbon Humberto Delgado
18h 22m
2 stops
IAH6:22 pmHouston George Bush Intcntl
$775

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 July 24, 2026.
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 - LIS

IAHLIS

Houston George Bush Intcntl

Tue 10/13

10:00 am-9:20 am

1 stop17h 20m

Lisbon Humberto Delgado

Tue 11/3

5:00 am-2:00 pm

1 stop15h 00m

$709

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 1/12

7:10 pm-10:00 pm

1 stop20h 50m

Porto

Tue 1/19

5:00 am-1:05 pm

1 stop14h 05m

$713
Quickest round-trip

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Tue 10/13

12:00 pm-9:20 am

2 stops15h 20m

Lisbon Humberto Delgado

Tue 11/3

5:00 am-2:00 pm

1 stop15h 00m

$717

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 1/12

11:50 am-10:35 am

2 stops16h 45m

Porto

Tue 1/19

5:00 am-1:05 pm

1 stop14h 05m

$718

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Wed 11/11

11:50 am-6:55 am

1 stop13h 05m

Lisbon Humberto Delgado

Thu 11/19

5:00 am-6:15 pm

1 stop19h 15m

$722

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Tue 11/10

7:30 am-8:10 am

1 stop18h 40m

Lisbon Humberto Delgado

Wed 11/18

5:00 am-6:15 pm

1 stop19h 15m

$724

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 1/12

11:50 am-10:35 am

2 stops16h 45m

Porto

Tue 1/19

5:00 am-6:28 pm

2 stops19h 28m

$727

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Tue 11/10

6:10 pm-6:55 am

2 stops30h 45m

Lisbon Humberto Delgado

Wed 11/18

5:00 am-6:27 pm

2 stops19h 27m

$730

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Tue 11/10

6:10 pm-6:55 am

2 stops30h 45m

Lisbon Humberto Delgado

Wed 11/18

5:00 am-6:27 pm

2 stops19h 27m

$735

HoustonFunchal

IAH - FNC

IAHFNC

Houston George Bush Intcntl

Mon 9/21

10:46 am-12:55 pm

2 stops44h 09m

Funchal Madeira

Mon 9/28

1:20 pm-9:59 pm

2 stops38h 39m

$972

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 November. Flight prices, which tend to average around $649, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of November, 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 November, still average around $705.

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 $898 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 $718 on momondo.

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

You could potentially save up to 16% 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

Fastest flight time

11h 50m

Direct flights

None
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.
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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?

  • 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 $476Free CancellationRating
7.8
1,545 reviews
Search KLM flights
Air FrancePriceFrom $512Free CancellationRating
7.5
1,626 reviews
Search Air France flights
DeltaPriceFrom $541Free CancellationRating
7.8
8,482 reviews
Search Delta flights
British AirwaysPriceFrom $559Free CancellationRating
6.7
8,132 reviews
Search British Airways flights
United AirlinesPriceFrom $581Free CancellationRating
7.4
10,032 reviews
Search United Airlines flights
Turkish AirlinesPriceFrom $621Free CancellationRating
7.4
4,455 reviews
Search Turkish Airlines flights
Air CanadaPriceFrom $646Free CancellationRating
7.1
11,383 reviews
Search Air Canada flights
LufthansaPriceFrom $719Free CancellationRating
6.8
8,156 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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