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Cheap flights from Houston George Bush Intcntl Airport to Portugal from $259

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 11/3. 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

United Airlines Logo
2:38 pm - 9:30 amIAH-OPO
12h 52m1 stop
United Airlines Logo
6:00 am - 6:15 pmOPO-IAH
18h 15m1 stop
$548United Airlines
Find Deal
Sun, Nov 16 - Fri, Jan 16
United Airlines Logo
9:49 am - 9:30 amIAH-OPO
17h 41m2 stops
United Airlines Logo
6:00 am - 6:15 pmOPO-IAH
18h 15m1 stop
$555United Airlines
Find Deal
Mon, Nov 17 - Fri, Jan 16
Air Canada Logo
11:50 am - 12:05 pmIAH-OPO
18h 15m2 stops
Air Canada Logo
6:00 am - 6:49 pmOPO-IAH
42h 49m2 stops
$583Air Canada
Find Deal
Mon, Nov 17 - Thu, Jan 15
Delta Logo
4:05 pm - 10:30 amIAH-OPO
12h 25m1 stop
Delta Logo
6:30 am - 1:30 pmOPO-IAH
37h 00m1 stop
$603Delta
Find Deal
Sun, Nov 16 - Mon, Jan 12
Delta Logo
10:02 am - 10:30 amIAH-OPO
18h 28m2 stops
Delta Logo
11:15 am - 1:30 pmOPO-IAH
32h 15m1 stop
$608Delta
Find Deal
Wed, Nov 19 - Thu, Jan 15
Air Canada Logo
6:10 pm - 8:55 amIAH-LIS
32h 45m2 stops
Air Canada Logo
5:00 am - 9:44 pmLIS-IAH
22h 44m2 stops
$618Air Canada
Find Deal
Fri, Feb 20 - Fri, Mar 6
Air France Logo
3:50 pm - 11:15 amIAH-LIS
13h 25m1 stop
Air France Logo
6:50 pm - 1:35 pmLIS-IAH
24h 45m1 stop
$636Air France
Find Deal
Mon, Oct 13 - Mon, Oct 20
Air France Logo
3:50 pm - 11:15 amIAH-LIS
13h 25m1 stop
Air France Logo
6:30 pm - 2:55 pmLIS-IAH
25h 25m1 stop
$642Air France
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Sun, Oct 19 - Sat, Nov 1
British Airways Logo
3:50 pm - 12:05 pmIAH-LIS
14h 15m1 stop
British Airways Logo
10:30 am - 9:34 pmLIS-IAH
16h 04m1 stop
$649British Airways
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Sun, Mar 1 - Sat, Mar 14
British Airways Logo
3:50 pm - 3:05 pmIAH-FNC
17h 15m1 stop
British Airways Logo
12:50 pm - 2:05 pmFNC-IAH
31h 15m1 stop
$695British Airways
Find Deal
Tue, Nov 11 - Sun, Nov 16

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
Sep 30
IAH9:00 pmHouston George Bush Intcntl
20h 35m
1 stop
LIS11:35 pmLisbon Humberto Delgado
Oct 7
LIS10:55 amLisbon Humberto Delgado
31h 45m
1 stop
IAH12:40 pmHouston George Bush Intcntl
$620
Find similar
Turkish Airlines
Oct 7
IAH9:00 pmHouston George Bush Intcntl
30h 55m
1 stop
LIS9:55 amLisbon Humberto Delgado
Oct 14
LIS4:45 pmLisbon Humberto Delgado
25h 55m
1 stop
IAH12:40 pmHouston George Bush Intcntl
$629
Find similar
Turkish Airlines
Oct 12
IAH9:00 pmHouston George Bush Intcntl
36h 15m
1 stop
LIS3:15 pmLisbon Humberto Delgado
Oct 22
LIS4:30 pmLisbon Humberto Delgado
32h 35m
1 stop
IAH7:05 pmHouston George Bush Intcntl
$647
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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 18
IAH4:30 pmHouston George Bush Intcntl
23h 55m
1 stop
OPO10:25 pmPorto
Jan 14
OPO12:30 pmPorto
40h 28m
2 stops
IAH10:58 pmHouston George Bush Intcntl
$584
Find similar
Lufthansa
Mar 16
IAH6:20 pmHouston George Bush Intcntl
24h 10m
2 stops
LIS11:30 pmLisbon Humberto Delgado
Mar 23
LIS2:10 pmLisbon Humberto Delgado
30h 00m
2 stops
IAH3:10 pmHouston George Bush Intcntl
$619
Find similar
Lufthansa
Mar 8
IAH5:30 pmHouston George Bush Intcntl
25h 00m
2 stops
LIS11:30 pmLisbon Humberto Delgado
Mar 26
LIS5:00 amLisbon Humberto Delgado
24h 12m
2 stops
IAH12:12 amHouston George Bush Intcntl
$621
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 September 19, 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

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 11/16

2:38 pm-9:30 am

1 stop12h 52m

Porto

Fri 1/16

6:00 am-6:15 pm

1 stop18h 15m

$548

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 11/17

9:49 am-9:30 am

2 stops17h 41m

Porto

Fri 1/16

6:00 am-6:15 pm

1 stop18h 15m

$555

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 11/17

11:50 am-12:05 pm

2 stops18h 15m

Porto

Thu 1/15

6:00 am-6:49 pm

2 stops42h 49m

$583

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 11/16

4:05 pm-10:30 am

1 stop12h 25m

Porto

Mon 1/12

6:30 am-1:30 pm

1 stop37h 00m

$603

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 11/19

10:02 am-10:30 am

2 stops18h 28m

Porto

Thu 1/15

11:15 am-1:30 pm

1 stop32h 15m

$608

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Fri 2/20

6:10 pm-8:55 am

2 stops32h 45m

Lisbon Humberto Delgado

Fri 3/6

5:00 am-9:44 pm

2 stops22h 44m

$618

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Mon 10/13

3:50 pm-11:15 am

1 stop13h 25m

Lisbon Humberto Delgado

Mon 10/20

6:50 pm-1:35 pm

1 stop24h 45m

$636

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Sun 10/19

3:50 pm-11:15 am

1 stop13h 25m

Lisbon Humberto Delgado

Sat 11/1

6:30 pm-2:55 pm

1 stop25h 25m

$642

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Sun 3/1

3:50 pm-12:05 pm

1 stop14h 15m

Lisbon Humberto Delgado

Sat 3/14

10:30 am-9:34 pm

1 stop16h 04m

$649

HoustonFunchal

IAH - FNC

IAHFNC

Houston George Bush Intcntl

Tue 11/11

3:50 pm-3:05 pm

1 stop17h 15m

Funchal Madeira

Sun 11/16

12:50 pm-2:05 pm

1 stop31h 15m

$695

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 $835 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.

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
Air FrancePriceFrom $549Free CancellationRating
7.4
1,468 reviews
Search Air France flights
Air CanadaPriceFrom $563Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
United AirlinesPriceFrom $576Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
American AirlinesPriceFrom $578Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
British AirwaysPriceFrom $585Free CancellationRating
6.7
7,373 reviews
Search British Airways flights
DeltaPriceFrom $620Free CancellationRating
7.9
7,964 reviews
Search Delta flights
KLMPriceFrom $629Free CancellationRating
7.8
1,386 reviews
Search KLM flights
Turkish AirlinesPriceFrom $637Free CancellationRating
7.3
3,969 reviews
Search Turkish Airlines flights
LufthansaPriceFrom $679Free CancellationRating
6.8
7,415 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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