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Cheap flights from Houston George Bush Intcntl Airport to Portugal from $373

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 5/14. 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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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.
Turkish Airlines Logo
9:05 pm - 3:45 pm
IAH
-
LIS
36h 40m
1 stop
Turkish Airlines Logo
11:00 am - 7:10 pm
LIS
-
IAH
38h 10m
1 stop
$695Turkish Airlines
Wed, Aug 26 - Fri, Sep 4
Turkish Airlines Logo
9:05 pm - 3:45 pm
IAH
-
LIS
36h 40m
1 stop
Turkish Airlines Logo
11:00 am - 7:10 pm
LIS
-
IAH
38h 10m
1 stop
$696Turkish Airlines
Wed, Aug 26 - Fri, Sep 4
Turkish Airlines Logo
9:05 pm - 3:35 pm
IAH
-
LIS
36h 30m
1 stop
Turkish Airlines Logo
5:55 am - 7:10 pm
LIS
-
IAH
19h 15m
1 stop
$698Turkish Airlines
Tue, Sep 15 - Tue, Sep 22
Turkish Airlines Logo
9:05 pm - 3:45 pm
IAH
-
LIS
36h 40m
1 stop
Turkish Airlines Logo
5:55 am - 7:10 pm
LIS
-
IAH
19h 15m
1 stop
$701Turkish Airlines
Wed, Sep 9 - Wed, Sep 16
Iberia Logo
6:13 pm - 12:55 pm
IAH
-
FNC
36h 42m
2 stops
Iberia Logo
11:20 am - 11:59 pm
FNC
-
IAH
18h 39m
2 stops
$856Iberia
Mon, May 4 - Sun, May 10
Iberia Logo
12:19 pm - 12:55 pm
IAH
-
FNC
42h 36m
2 stops
Iberia Logo
11:20 am - 11:59 pm
FNC
-
IAH
18h 39m
2 stops
$857Iberia
Mon, May 4 - Sun, May 10
British Airways Logo
3:30 pm - 6:05 pm
IAH
-
FNC
20h 35m
1 stop
British Airways Logo
7:35 pm - 1:25 pm
FNC
-
IAH
23h 50m
1 stop
$905British Airways
Sun, Sep 20 - Tue, Oct 6
British Airways Logo
1:24 pm - 6:05 pm
IAH
-
FNC
22h 41m
2 stops
British Airways Logo
7:35 pm - 1:25 pm
FNC
-
IAH
23h 50m
1 stop
$930British Airways
Sun, Sep 20 - Tue, Oct 6
Multiple Airlines Logo
6:00 am - 12:25 pm
IAH
-
FNC
24h 25m
3 stops
Multiple Airlines Logo
5:35 am - 3:01 pm
FNC
-
IAH
39h 26m
2 stops
$1,107Multiple Airlines
Sun, Jun 7 - Sun, Jun 14
Multiple Airlines Logo
6:00 am - 12:25 pm
IAH
-
FNC
24h 25m
3 stops
Multiple Airlines Logo
5:35 am - 11:36 pm
FNC
-
IAH
48h 01m
3 stops
$1,109Multiple Airlines
Sun, Jun 7 - Sun, Jun 14

Turkish Airlines flights from Houston George Bush Intcntl Airport to Portugal

Our best Turkish Airlines deals on Houston George Bush Intcntl Airport to Portugal flight tickets
Turkish Airlines
Aug 26
IAH9:05 pmHouston George Bush Intcntl
36h 40m
1 stop
LIS3:45 pmLisbon Humberto Delgado
Sep 4
LIS11:00 amLisbon Humberto Delgado
38h 10m
1 stop
IAH7:10 pmHouston George Bush Intcntl
$695
Turkish Airlines
Aug 26
IAH9:05 pmHouston George Bush Intcntl
36h 40m
1 stop
LIS3:45 pmLisbon Humberto Delgado
Sep 4
LIS11:00 amLisbon Humberto Delgado
38h 10m
1 stop
IAH7:10 pmHouston George Bush Intcntl
$696
Turkish Airlines
Sep 15
IAH9:05 pmHouston George Bush Intcntl
36h 30m
1 stop
LIS3:35 pmLisbon Humberto Delgado
Sep 22
LIS5:55 amLisbon Humberto Delgado
19h 15m
1 stop
IAH7:10 pmHouston George Bush Intcntl
$698

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
Apr 28
IAH3:50 pmHouston George Bush Intcntl
20h 00m
1 stop
LIS5:50 pmLisbon Humberto Delgado
May 6
LIS11:55 amLisbon Humberto Delgado
31h 25m
1 stop
IAH1:20 pmHouston George Bush Intcntl
$776
Delta
Apr 20
IAH3:50 pmHouston George Bush Intcntl
20h 00m
1 stop
LIS5:50 pmLisbon Humberto Delgado
May 4
LIS11:55 amLisbon Humberto Delgado
31h 25m
1 stop
IAH1:20 pmHouston George Bush Intcntl
$779
Delta
Apr 28
IAH9:58 amHouston George Bush Intcntl
18h 47m
2 stops
LIS10:45 amLisbon Humberto Delgado
May 6
LIS11:55 amLisbon Humberto Delgado
31h 25m
1 stop
IAH1:20 pmHouston George Bush Intcntl
$780

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 April 18, 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

Wed 8/26

9:05 pm-3:45 pm

1 stop36h 40m

Lisbon Humberto Delgado

Fri 9/4

11:00 am-7:10 pm

1 stop38h 10m

$695

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Wed 8/26

9:05 pm-3:45 pm

1 stop36h 40m

Lisbon Humberto Delgado

Fri 9/4

11:00 am-7:10 pm

1 stop38h 10m

$696

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Tue 9/15

9:05 pm-3:35 pm

1 stop36h 30m

Lisbon Humberto Delgado

Tue 9/22

5:55 am-7:10 pm

1 stop19h 15m

$698

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Wed 9/9

9:05 pm-3:45 pm

1 stop36h 40m

Lisbon Humberto Delgado

Wed 9/16

5:55 am-7:10 pm

1 stop19h 15m

$701

HoustonFunchal

IAH - FNC

IAHFNC

Houston George Bush Intcntl

Mon 5/4

6:13 pm-12:55 pm

2 stops36h 42m

Funchal Madeira

Sun 5/10

11:20 am-11:59 pm

2 stops18h 39m

$856

HoustonFunchal

IAH - FNC

IAHFNC

Houston George Bush Intcntl

Mon 5/4

12:19 pm-12:55 pm

2 stops42h 36m

Funchal Madeira

Sun 5/10

11:20 am-11:59 pm

2 stops18h 39m

$857
Quickest round-trip

HoustonFunchal

IAH - FNC

IAHFNC

Houston George Bush Intcntl

Sun 9/20

3:30 pm-6:05 pm

1 stop20h 35m

Funchal Madeira

Tue 10/6

7:35 pm-1:25 pm

1 stop23h 50m

$905

HoustonFunchal

IAH - FNC

IAHFNC

Houston George Bush Intcntl

Sun 9/20

1:24 pm-6:05 pm

2 stops22h 41m

Funchal Madeira

Tue 10/6

7:35 pm-1:25 pm

1 stop23h 50m

$930

HoustonFunchal

IAH - FNC

IAHFNC

Houston George Bush Intcntl

Sun 6/7

6:00 am-12:25 pm

3 stops24h 25m

Funchal Madeira

Sun 6/14

5:35 am-3:01 pm

2 stops39h 26m

$1,107

HoustonFunchal

IAH - FNC

IAHFNC

Houston George Bush Intcntl

Sun 6/7

6:00 am-12:25 pm

3 stops24h 25m

Funchal Madeira

Sun 6/14

5:35 am-11:36 pm

3 stops48h 01m

$1,109

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 $620, 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 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 $861 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 $660 on momondo.

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

You could potentially save up to 17% 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

15h 00m

Direct flights

None
The fastest flight from Houston George Bush Intcntl Airport to Portugal takes 15h 00m
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
1,502 reviews
Search KLM flights
Air FrancePriceFrom $540Free CancellationRating
7.4
1,572 reviews
Search Air France flights
DeltaPriceFrom $541Free CancellationRating
7.9
8,423 reviews
Search Delta flights
United AirlinesPriceFrom $577Free CancellationRating
7.4
9,605 reviews
Search United Airlines flights
Turkish AirlinesPriceFrom $621Free CancellationRating
7.3
4,308 reviews
Search Turkish Airlines flights
British AirwaysPriceFrom $628Free CancellationRating
6.7
7,891 reviews
Search British Airways flights
Air CanadaPriceFrom $646Free CancellationRating
7.1
10,938 reviews
Search Air Canada flights
LufthansaPriceFrom $831Free CancellationRating
6.8
7,930 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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