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Cheap flights from Houston George Bush Intcntl Airport to Portugal from $208

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 3/3. 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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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.
United Airlines Logo
6:30 am - 9:30 am
IAH
-
OPO
21h 00m1 stop
United Airlines Logo
12:35 pm - 11:39 pm
OPO
-
IAH
16h 04m1 stop
$436United Airlines
lun., feb. 23 - mar., mar. 10
United Airlines Logo
8:20 pm - 9:30 am
IAH
-
OPO
31h 10m1 stop
United Airlines Logo
12:35 pm - 11:39 pm
OPO
-
IAH
16h 04m1 stop
$437United Airlines
lun., feb. 23 - mié., mar. 11
British Airways Logo
4:36 pm - 5:35 pm
IAH
-
OPO
18h 59m2 stops
British Airways Logo
8:20 am - 11:53 pm
OPO
-
IAH
20h 33m2 stops
$445British Airways
lun., feb. 23 - mié., mar. 11
Lufthansa Logo
6:55 pm - 3:25 pm
IAH
-
OPO
14h 30m1 stop
Lufthansa Logo
6:00 am - 6:15 pm
OPO
-
IAH
18h 15m1 stop
$451Lufthansa
mié., feb. 4 - mar., feb. 10
British Airways Logo
4:36 pm - 5:35 pm
IAH
-
OPO
18h 59m2 stops
British Airways Logo
8:40 pm - 9:27 pm
OPO
-
IAH
29h 47m2 stops
$452British Airways
lun., feb. 23 - mar., mar. 10
Lufthansa Logo
4:30 pm - 10:25 pm
IAH
-
OPO
23h 55m1 stop
Lufthansa Logo
6:00 am - 7:15 pm
OPO
-
IAH
18h 15m1 stop
$453Lufthansa
mié., mar. 4 - mié., mar. 11
Delta Logo
5:30 am - 8:00 am
IAH
-
LIS
20h 30m2 stops
Delta Logo
11:25 am - 1:30 pm
LIS
-
IAH
32h 05m1 stop
$501Delta
lun., feb. 2 - lun., feb. 16
Delta Logo
4:05 pm - 3:10 pm
IAH
-
LIS
17h 05m1 stop
Delta Logo
11:25 am - 1:30 pm
LIS
-
IAH
32h 05m1 stop
$505Delta
lun., feb. 2 - lun., feb. 16
KLM Logo
3:20 pm - 10:50 pm
IAH
-
LIS
25h 30m1 stop
KLM Logo
11:55 am - 1:15 pm
LIS
-
IAH
31h 20m1 stop
$511KLM
mié., abr. 15 - mar., abr. 28
KLM Logo
4:25 pm - 2:35 pm
IAH
-
LIS
16h 10m2 stops
KLM Logo
3:30 pm - 1:30 pm
LIS
-
IAH
28h 00m1 stop
$512KLM
lun., feb. 2 - lun., feb. 16

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
Mar 17
IAH5:05 pmHouston George Bush Intcntl
12h 25m
1 stop
OPO10:30 amPorto
Mar 24
OPO11:25 amPorto
26h 45m
2 stops
IAH9:10 amHouston George Bush Intcntl
$475
Delta
Mar 17
IAH12:40 pmHouston George Bush Intcntl
21h 45m
2 stops
OPO3:25 pmPorto
Mar 24
OPO11:25 amPorto
29h 26m
2 stops
IAH11:51 amHouston George Bush Intcntl
$493
Delta
Feb 2
IAH5:30 amHouston George Bush Intcntl
20h 30m
2 stops
LIS8:00 amLisbon Humberto Delgado
Feb 16
LIS11:25 amLisbon Humberto Delgado
32h 05m
1 stop
IAH1:30 pmHouston George Bush Intcntl
$501

United Airlines flights from Houston George Bush Intcntl Airport to Portugal

Our best United Airlines deals on Houston George Bush Intcntl Airport to Portugal flight tickets
United Airlines
Feb 23
IAH8:00 amHouston George Bush Intcntl
19h 30m
1 stop
OPO9:30 amPorto
Mar 10
OPO12:35 pmPorto
16h 55m
2 stops
IAH12:30 amHouston George Bush Intcntl
$436
United Airlines
Feb 23
IAH8:20 pmHouston George Bush Intcntl
31h 10m
1 stop
OPO9:30 amPorto
Mar 11
OPO12:35 pmPorto
16h 04m
1 stop
IAH11:39 pmHouston George Bush Intcntl
$437
United Airlines
Mar 16
IAH4:55 pmHouston George Bush Intcntl
11h 35m
1 stop
OPO9:30 amPorto
Mar 24
OPO12:30 pmPorto
31h 40m
1 stop
IAH3:10 pmHouston George Bush Intcntl
$473

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 enero 8, 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

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

lun. 2/23

6:30 am-9:30 am

1 stop21h 00m

Porto

mar. 3/10

12:35 pm-11:39 pm

1 stop16h 04m

$436

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

lun. 2/23

8:20 pm-9:30 am

1 stop31h 10m

Porto

mié. 3/11

12:35 pm-11:39 pm

1 stop16h 04m

$437

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

lun. 2/23

4:36 pm-5:35 pm

2 stops18h 59m

Porto

mié. 3/11

8:20 am-11:53 pm

2 stops20h 33m

$445

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

mié. 2/4

6:55 pm-3:25 pm

1 stop14h 30m

Porto

mar. 2/10

6:00 am-6:15 pm

1 stop18h 15m

$451

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

lun. 2/23

4:36 pm-5:35 pm

2 stops18h 59m

Porto

mar. 3/10

8:40 pm-9:27 pm

2 stops29h 47m

$452

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

mié. 3/4

4:30 pm-10:25 pm

1 stop23h 55m

Porto

mié. 3/11

6:00 am-7:15 pm

1 stop18h 15m

$453

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

lun. 2/2

5:30 am-8:00 am

2 stops20h 30m

Lisbon Humberto Delgado

lun. 2/16

11:25 am-1:30 pm

1 stop32h 05m

$501

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

lun. 2/2

4:05 pm-3:10 pm

1 stop17h 05m

Lisbon Humberto Delgado

lun. 2/16

11:25 am-1:30 pm

1 stop32h 05m

$505

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

mié. 4/15

3:20 pm-10:50 pm

1 stop25h 30m

Lisbon Humberto Delgado

mar. 4/28

11:55 am-1:15 pm

1 stop31h 20m

$511

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

lun. 2/2

4:25 pm-2:35 pm

2 stops16h 10m

Lisbon Humberto Delgado

lun. 2/16

3:30 pm-1:30 pm

1 stop28h 00m

$512

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 $625, 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 November instead. Flights to Portugal in November, while not as cheap as those in February, still average around $631.

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 $832 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 $742 on momondo.

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

You could potentially save up to 42% 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

13h 15m

Direct flights

None
The fastest flight from Houston George Bush Intcntl Airport to Portugal takes 13h 15m
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

  • 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 $494Free CancellationRating
7.7
1,434 reviews
Search KLM flights
Air FrancePriceFrom $540Free CancellationRating
7.4
1,519 reviews
Search Air France flights
DeltaPriceFrom $546Free CancellationRating
7.9
8,032 reviews
Search Delta flights
British AirwaysPriceFrom $558Free CancellationRating
6.7
7,659 reviews
Search British Airways flights
United AirlinesPriceFrom $587Free CancellationRating
7.4
9,142 reviews
Search United Airlines flights
Turkish AirlinesPriceFrom $621Free CancellationRating
7.3
4,154 reviews
Search Turkish Airlines flights
Air CanadaPriceFrom $646Free CancellationRating
7.1
10,603 reviews
Search Air Canada flights
LufthansaPriceFrom $679Free CancellationRating
6.8
7,698 reviews
Search Lufthansa flights
American AirlinesPriceFrom $699Free CancellationRating
7.2
11,097 reviews
Search American Airlines 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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